CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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Merged
kbuffardi merged 2 commits into from
Feb 23, 2026
Merged

CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152 #13

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77b2e85
CPP compilation excludes redundant code submission file, fixes codewi…
kbuffardi Feb 19, 2026
62d8cb6
Update template C++ test code
kbuffardi Feb 20, 2026
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4 changes: 2 additions & 2 deletions README.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
"language": "cpp",
"code": "int add(int a, int b) { return a + b; }\n",
"code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n",
"runTests": true,
"testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
"testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down
4 changes: 2 additions & 2 deletions codeeval.http
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Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
"language": "cpp",
"code": "int add(int a, int b) { return a + b; }\n",
"code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n",
"runTests": true,
"testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
"testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down
3 changes: 1 addition & 2 deletions executor.js
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Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
const testHeaderPath = path.join(uniqueDir, 'test_program.h');
const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
const runnerExecutablePath = path.join(uniqueDir, 'runner');
const mainCppPath = path.join(uniqueDir, 'program.cpp');

await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);

@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.

Can we:

@kbuffardikbuffardiFeb 19, 2026

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From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.

A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.

Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.

Can we [...] Verify if all testCode will contain #include program.cpp?

Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h

I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us

Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?

Agreed, I'll update this PR with those revisions as well.

@NickK21NickK21Feb 21, 2026

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PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.

Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:

  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.

}

function extractFunctionDeclarations(cppCode) {
Expand Down
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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 Merged

kbuffardi
merged 2 commits into

from

Feb 23, 2026
 Merged


CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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77b2e85

CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down

4 changes: 2 additions & 2 deletions
codeeval.http

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down

3 changes: 1 addition & 2 deletions
executor.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

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ContributorAuthor
Choose a reason for hiding this comment

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From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

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Choose a reason for hiding this comment

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PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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 Merged

kbuffardi
merged 2 commits into

from

Feb 23, 2026
 Merged


CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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77b2e85

CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down

4 changes: 2 additions & 2 deletions
codeeval.http

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down

3 changes: 1 addition & 2 deletions
executor.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

Copy link


Copy Markdown

ContributorAuthor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

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Contributor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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 Merged

kbuffardi
merged 2 commits into

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Feb 23, 2026
 Merged


CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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77b2e85

CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

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Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down

4 changes: 2 additions & 2 deletions
codeeval.http

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Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down

3 changes: 1 addition & 2 deletions
executor.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

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From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

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PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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 Merged

kbuffardi
merged 2 commits into

from

Feb 23, 2026
 Merged


CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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77b2e85

CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down

4 changes: 2 additions & 2 deletions
codeeval.http

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down

3 changes: 1 addition & 2 deletions
executor.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

Copy link


Copy Markdown

ContributorAuthor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

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PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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 Merged

kbuffardi
merged 2 commits into

from

Feb 23, 2026
 Merged


CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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77b2e85

CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down

4 changes: 2 additions & 2 deletions
codeeval.http

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down

3 changes: 1 addition & 2 deletions
executor.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

Copy link


Copy Markdown

ContributorAuthor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

Copy link


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Contributor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152#13

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 Merged

kbuffardi
merged 2 commits into

from

Feb 23, 2026
 Merged


CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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77b2e85

CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

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4 changes: 2 additions & 2 deletions
codeeval.http

View file


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Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
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3 changes: 1 addition & 2 deletions
executor.js

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Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

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From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

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PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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 Merged

kbuffardi
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Feb 23, 2026
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CPP compilation excludes redundant code submission file, fixes codewit-us/codewit.us#152
#13
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CPP compilation excludes redundant code submission file, fixes codewi…


kbuffardi Feb 19, 2026
62d8cb6

Update template C++ test code


kbuffardi Feb 20, 2026

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4 changes: 2 additions & 2 deletions
README.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -99,9 +99,9 @@ curl -X POST http://localhost:3000/execute \
-H "Content-Type: application/json" \
-d '{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}'
```

Expand Down

4 changes: 2 additions & 2 deletions
codeeval.http

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -33,9 +33,9 @@ Cookie: connect.sid=suhvferkuhvikerv

{
 "language": "cpp",
 "code": "int add(int a, int b) { return a + b; }\n", 
 "code": "#include <iostream>\nusing namespace std;\nint main(){\ncout<<\"Hola!\n\";\nreturn 0;\n}\n", 
 "runTests": true,
 "testCode": "extern int add(int a, int b);\n#include <cxxtest/TestSuite.h>\n\nclass AddTestSuite : public CxxTest::TestSuite {\npublic:\n void testAddPositiveNumbers() { TS_ASSERT_EQUALS(add(2, 3), 5); }\n void testAddNegativeNumbers() { TS_ASSERT_EQUALS(add(-1, 1), 0); }\n};"
 "testCode": "#include <cxxtest/TestSuite.h>\n#include <sstream>\n#include <iostream>\n#define main program_main\n#include \"program.cpp\"\n#undef main\nclass codewit_test : public CxxTest::TestSuite {\npublic:\nvoid testHolaMundo(){\nstd::stringstream out;\nstd::streambuf* cout_buf = std::cout.rdbuf();\nstd::cout.rdbuf(out.rdbuf());\nprogram_main();\nstd::cout.rdbuf(cout_buf);\nTS_ASSERT_EQUALS(\"Hola!\n\",out.str());}};\n"
}

###
Expand Down

3 changes: 1 addition & 2 deletions
executor.js

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -154,10 +154,9 @@ async function generateCppTestRunner(uniqueDir) {
 const testHeaderPath = path.join(uniqueDir, 'test_program.h');
 const runnerCppPath = path.join(uniqueDir, 'runner.cpp');
 const runnerExecutablePath = path.join(uniqueDir, 'runner');
 const mainCppPath = path.join(uniqueDir, 'program.cpp');

 await compileCode('cxxtestgen', ['--error-printer', '-o', runnerCppPath, testHeaderPath], uniqueDir);
 await compileCode('g++', ['-o', runnerExecutablePath, runnerCppPath, mainCppPath], uniqueDir);
 await compileCode('g++', ['-std=c++20', '-o', runnerExecutablePath, runnerCppPath], uniqueDir);
@NickK21NickK21Feb 19, 2026

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program.cpp was removed from linking unconditionally. That fixes duplicate-symbol errors when tests #include "program.cpp", but it breaks extern-style tests (shown in README.md (line 104) and codeeval.http (line 38)) because student symbols are no longer linked.
Can we:
@kbuffardikbuffardiFeb 19, 2026

Copy link


Copy Markdown

ContributorAuthor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

From a strategic standpoint, it's important that we let the user submit code that matches the video's code exactly and it should always pass the tests.
A secondary priority is that we want to avoid the system having to edit the user's submitted attempt (such as wrapping it in a novel namespace, deleting some code, or other workarounds) mostly because (A) it'd add more complexity and potential points of failure, and (B) compilation errors would likely report inconsistent line numbers with what the user actually submitted.
Therefore, it makes sense to put the burden on the test code for every exercise to adapt as necessary to test what was demonstrated in the video.
Can we [...] Verify if all testCode will contain #include program.cpp?
Yes. I'll make sure to document it for reference purposes, but this seems like our best solution. The test code will need to manipulate how program.cpp is processed (e.g. capture cin/cout to automate simulated console interaction, redefine main as program_main, etc.) so we'll need to adopt the practice of making sure to always #include program.cpp in the test file test_program.h
I've verified that the approach this PR takes fixes the compilation error when run manually within the codewit-us/containership/Dockerfile.cpp.box container. However, before merging it, we should verify that it works in local development with codeval + codewit.us
Update/align README.md and codeeval.http with the intended pattern(s) if something somewhere is incorrect?
Agreed, I'll update this PR with those revisions as well.
@NickK21NickK21Feb 21, 2026

Copy link


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Contributor
Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

PR #13 fixes the immediate duplicate-linking failure for include-style C++ tests by removing program.cpp from the runner link step, and I have confirmed that include-style payloads now pass locally.
Approving this as a scoped hotfix, with one suggested follow-up issue before/alongside rollout:
  • Remove C++ declaration injection in executor.js (the regex-generated declarations prepended to test_program.h) so test behavior is owned entirely by testCode (#include "program.cpp, main renaming, I/O adaptation), since the current injection can still introduce signature conflicts (e.g., unsigned int vs int) and cause compile errors unrelated to student correctness.
}

function extractFunctionDeclarations(cppCode) {
Expand Down