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JUnit-Examples-for-Beginners

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

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4 stars

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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - ImrenR/JUnit-Examples-for-Beginners: A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure. · GitHub
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JUnit-Examples-for-Beginners

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

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Stars

4 stars

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0 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' GitHub - ImrenR/JUnit-Examples-for-Beginners: A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure. · GitHub
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JUnit-Examples-for-Beginners

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

Topics

Resources

Stars

4 stars

Watchers

0 watching

Forks

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

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

Topics

Resources

Stars

4 stars

Watchers

0 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' GitHub - ImrenR/JUnit-Examples-for-Beginners: A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure. · GitHub
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JUnit-Examples-for-Beginners

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

Topics

Resources

Stars

4 stars

Watchers

0 watching

Forks

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' GitHub - ImrenR/JUnit-Examples-for-Beginners: A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure. · GitHub
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JUnit-Examples-for-Beginners

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

Topics

Resources

Stars

4 stars

Watchers

0 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' GitHub - ImrenR/JUnit-Examples-for-Beginners: A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure. · GitHub
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JUnit-Examples-for-Beginners

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

Topics

Resources

Stars

4 stars

Watchers

0 watching

Forks

Releases

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Contributors

Languages

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

A practical collection of JUnit tests for learning and practicing Java testing.
This repository is designed for beginners to understand how to write unit tests, handle exceptions, and use parameterized tests in Java.


📖 About

JUnit is a popular Java testing framework that allows developers to test their code automatically.
This repo includes simple examples covering:

  • Basic unit tests
  • Exception testing
  • Parameterized tests
  • Testing common Java classes and small projects

🗂 Project Structure

JUnit-Examples-for-Beginners/
│
├─ src/
│ ├─ main
│ ├─ java
│ ├─ jUnit
│ │ ├─ C01_Calculator.java # Basic arithmetic operations
│ │ │ │ │ │
│ └─ test/java/jUnit
│ ├─ C01_CalculatorTest.java
│ ├─ J01_Assertions.java
│ └─ J02_BeforeAfterEachhAll.java

License

All content in this repository is the original work of the author. You may use it for learning and reference purposes only. Re-uploading, redistributing, or presenting this work as your own is not allowed.

About

A beginner-friendly collection of Java unit tests using JUnit , including examples for Calculator, String utilities, and BankAccount. Learn unit testing, exception handling, and test structure.

Topics

Resources

Stars

4 stars

Watchers

0 watching

Forks

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