Spying on printf breaks coverage collection #724

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Closed
Spying on printf breaks coverage collection#724
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Description

@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1

Summary

Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)

This likely relates to #607

Current behavior

When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.

How to reproduce

# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}

Run bashunit tests/test_hello_world.sh --coverage

Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.

Expected behavior

Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon

Metadata

Metadata

Assignees

Labels

bugSomething isn't working

Type

No type

Projects

  • bashunit
    Status
    Done

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions

, '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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Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions

, '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
Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions

, '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('^' + ".*" + '

Skip to content
Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions

, '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" + '

Skip to content
Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions

, '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
Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions

, '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('^' + ".*" + '

Skip to content
Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions

, '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); }
})();
})();

Skip to content
Spying on printf breaks coverage collection #724
Closed
Closed
Spying on printf breaks coverage collection#724
Assignees
Chemaclass
Labels
bugSomething isn't working
Description
@RevanProdigalKnight
RevanProdigalKnight
opened on Jun 16, 2026
QA
OSLinux (Cygwin on Windows 10)
Shell & versionbash 5.2.21(1)-release
bashunit version0.39.1
Summary
Spying on printf causes coverage information for a given test to be improperly collected (i.e. not collected)
This likely relates to #607
Current behavior
When spying on printf in a test, coverage information for any functions called during the test's execution is not collected properly.
How to reproduce
# source filefunctionhello_world() {
printf'%s\n'"hello world"
}
# test filefunctiontest_hello_world() {
bashunit::spy printf
hello_world
assert_have_been_called_with printf'%s\n'"hello world"
}
Run bashunit tests/test_hello_world.sh --coverage
Open the coverage report and see that the line printf '%s\n' "hello world" in function hello_world is not marked as being covered.
Expected behavior
Coverage information for all lines is collect properly regardless of what shell builtins have been spied upon
Metadata
Metadata
Assignees
Labels
bugSomething isn't working
Type
No type
Projects
  • bashunit
    Status
    Done
Milestone
No milestone
Relationships
None yet
Development
No branches or pull requests
Issue actions