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JavaScript Testing

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

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JavaScript unit testing using Vitest

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, '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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JavaScript Testing

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

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JavaScript unit testing using Vitest

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

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

About

JavaScript unit testing using Vitest

Topics

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0 stars

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1 watching

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, '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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JavaScript Testing

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

About

JavaScript unit testing using Vitest

Topics

Resources

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0 stars

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1 watching

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, '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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JavaScript Testing

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

About

JavaScript unit testing using Vitest

Topics

Resources

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0 stars

Watchers

1 watching

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

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

About

JavaScript unit testing using Vitest

Topics

Resources

Stars

0 stars

Watchers

1 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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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JavaScript Testing

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

About

JavaScript unit testing using Vitest

Topics

Resources

Stars

0 stars

Watchers

1 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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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JavaScript Testing

Testing in software development is a crucial process aimed at ensuring the quality, functionality, and reliability of software applications. It involves executing software with the intent of identifying errors, gaps, or missing requirements compared to the desired outcomes. The process of software testing can be broadly categorized into several key types, each serving a specific purpose within the development lifecycle

You can also read:

Initial setup

  1. Initialize your project
    npm init
  2. Install Vitest as a development dependency
    npm i -D vitest
  3. Add the test command to your package.json
    scripts: {
    ...
    "test": "vitest"
    }
    
  4. Run your tests in watch mode
    npm run test

1 - vitest running2 - vitest commands

Test UI

  1. Install @vitest/ui
    npm i -D @vitest/ui
  2. Add test:ui command to package.json
    scripts: {
    ...
    "test:ui": "vitest --ui"
    }
    
  3. Run the test:ui command
    npm run test:ui

3 - vitest ui4 - vitest ui 2

Code Coverage

  1. Add the command to package.json
    scripts: {
    ...
    "coverage": "vitest run --coverage"
    }
    
  2. Run the coverage command and install the dependencies
    npm run coverage
  3. Re-run the command
    npm run coverage
  4. Go to the generated coverage directory
  5. Open your index.html file (recommended extension - LiveServer)

5 - vitest coverage6 - vitest coverage 2

About

JavaScript unit testing using Vitest

Topics

Resources

Stars

0 stars

Watchers

1 watching

Forks

Releases

Packages

Used by

Contributors

Languages