refactor: remove old test suite update docs (#7498)

* chore: update all ci workflows

* chore: added readme for tests

* chore: fix release branch

* Update .github/workflows/release-branch.yml

Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

---------

Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

.github/workflows/publish.yml

@@ -12,7 +12,6 @@ permissions:
 jobs:
   publish:
     runs-on: ubuntu-latest
-
     steps:
       - name: Checkout repo
         uses: actions/checkout@v6

.github/workflows/release-branch.yml

@@ -21,12 +21,112 @@ permissions:
   pull-requests: write
 
 jobs:
-  release:
+  build-and-run-vitest:
+    name: Build and run vitest
     runs-on: ubuntu-latest
-
     steps:
       - name: Checkout repo
         uses: actions/checkout@v6
+        with:
+          persist-credentials: true
+      - name: Setup node
+        uses: actions/setup-node@v6
+        with:
+          node-version: 24.x
+          cache: npm
+      - name: Install dependencies
+        run: npm ci
+      - name: Build project
+        run: npm run build
+      - name: Install Playwright with deps
+        run: npx playwright install --with-deps
+      - name: Run unit tests
+        run: npm run test:vitest:unit
+      - name: Run browser tests
+        run: npm run test:vitest:browser:headless
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v7
+        with:
+          name: axios
+          path: dist
+          retention-days: 1
+
+  cjs-smoke-tests:
+    name: CJS smoke tests (Node ${{ matrix.node-version }})
+    needs: build-and-run-vitest
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [12, 14, 16, 18]
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: true
+      - name: Setup node
+        uses: actions/setup-node@v6
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+          cache-dependency-path: tests/smoke/cjs/package-lock.json
+      - name: Install dependencies
+        if: matrix.node-version == 16 || matrix.node-version == 18
+        run: npm ci
+      - name: Download build artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: axios
+          path: dist
+      - name: Install CJS smoke test dependencies
+        working-directory: tests/smoke/cjs
+        run: npm install
+      - name: Run CJS smoke tests
+        working-directory: tests/smoke/cjs
+        run: npm run test:smoke:cjs:mocha
+
+  esm-smoke-tests:
+    name: ESM smoke tests (Node ${{ matrix.node-version }})
+    needs: build-and-run-vitest
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [20, 22, 24]
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: true
+      - name: Setup node
+        uses: actions/setup-node@v6
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+          cache-dependency-path: tests/smoke/esm/package-lock.json
+      - name: Install dependencies
+        run: npm ci
+      - name: Download build artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: axios
+          path: dist
+      - name: Install ESM smoke test dependencies
+        working-directory: tests/smoke/esm
+        run: npm install
+      - name: Run ESM smoke tests
+        working-directory: tests/smoke/esm
+        run: npm run test:smoke:esm:vitest
+
+  bump-version-and-create-pr:
+    name: Bump version and create PR
+    needs: [build-and-run-vitest, cjs-smoke-tests, esm-smoke-tests]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
@@ -61,19 +161,13 @@ jobs:
         run: npm run preversion
       - name: Build project
         run: npm run build
-      - name: Run unit tests
-        run: npm run test:node
-      - name: Run package tests
-        run: npm run test:package
-      - name: Run browser tests
-        run: npm run test:browser
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@v8
         with:
-          branch: "release"
+          branch: 'release'
-          commit-message: "chore(release): prepare release ${{ steps.bump-version.outputs.newTag }}"
+          commit-message: 'chore(release): prepare release ${{ steps.bump-version.outputs.newTag }}'
-          body: "This PR prepares the release ${{ steps.bump-version.outputs.newTag }}."
+          body: 'This PR prepares the release ${{ steps.bump-version.outputs.newTag }}.'
-          title: "chore(release): prepare release ${{ steps.bump-version.outputs.newTag }}"
+          title: 'chore(release): prepare release ${{ steps.bump-version.outputs.newTag }}'
           maintainer-can-modify: true
           draft: false
           labels: |

.github/workflows/run-ci.yml

@@ -13,7 +13,8 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  ci:
+  build-and-run-vitest:
+    name: Build and run vitest
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
@@ -46,7 +47,7 @@ jobs:
 
   cjs-smoke-tests:
     name: CJS smoke tests (Node ${{ matrix.node-version }})
-    needs: ci
+    needs: build-and-run-vitest
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -80,7 +81,7 @@ jobs:
 
   esm-smoke-tests:
     name: ESM smoke tests (Node ${{ matrix.node-version }})
-    needs: ci
+    needs: build-and-run-vitest
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false

karma.conf.cjs

@@ -1,224 +0,0 @@
-/* eslint-disable no-console */
-/* eslint-disable no-unused-vars */
-/* eslint-disable func-names */
-// Karma configuration
-// Generated on Fri Aug 15 2014 23:11:13 GMT-0500 (CDT)
-
-'use strict';
-
-var resolve = require('@rollup/plugin-node-resolve').default;
-var commonjs = require('@rollup/plugin-commonjs');
-
-function createCustomLauncher(browser, version, platform) {
-  return {
-    base: 'SauceLabs',
-    browserName: browser,
-    version: version,
-    platform: platform,
-  };
-}
-
-module.exports = function (config) {
-  var customLaunchers = {};
-  var browsers = process.env.Browsers && process.env.Browsers.split(',');
-  var sauceLabs;
-
-  if (process.env.SAUCE_USERNAME || process.env.SAUCE_ACCESS_KEY) {
-    customLaunchers = {};
-
-    var runAll = true;
-    var options = [
-      'SAUCE_CHROME',
-      'SAUCE_FIREFOX',
-      'SAUCE_SAFARI',
-      'SAUCE_OPERA',
-      'SAUCE_IE',
-      'SAUCE_EDGE',
-      'SAUCE_IOS',
-      'SAUCE_ANDROID',
-    ];
-
-    options.forEach(function (opt) {
-      if (process.env[opt]) {
-        runAll = false;
-      }
-    });
-
-    // Chrome
-    if (runAll || process.env.SAUCE_CHROME) {
-      customLaunchers.SL_Chrome = createCustomLauncher('chrome');
-      // customLaunchers.SL_ChromeDev = createCustomLauncher('chrome', 'dev');
-      // customLaunchers.SL_ChromeBeta = createCustomLauncher('chrome', 'beta');
-    }
-
-    // Firefox
-    if (runAll || process.env.SAUCE_FIREFOX) {
-      //customLaunchers.SL_Firefox = createCustomLauncher('firefox');
-      // customLaunchers.SL_FirefoxDev = createCustomLauncher('firefox', 'dev');
-      // customLaunchers.SL_FirefoxBeta = createCustomLauncher('firefox', 'beta');
-    }
-
-    // Safari
-    if (runAll || process.env.SAUCE_SAFARI) {
-      // customLaunchers.SL_Safari7 = createCustomLauncher('safari', 7);
-      // customLaunchers.SL_Safari8 = createCustomLauncher('safari', 8);
-      customLaunchers.SL_Safari9 = createCustomLauncher('safari', 9.0, 'OS X 10.11');
-      customLaunchers.SL_Safari10 = createCustomLauncher('safari', '10.1', 'macOS 10.12');
-      customLaunchers.SL_Safari11 = createCustomLauncher('safari', '11.1', 'macOS 10.13');
-    }
-
-    // Opera
-    if (runAll || process.env.SAUCE_OPERA) {
-      // TODO The available versions of Opera are too old and lack basic APIs
-      // customLaunchers.SL_Opera11 = createCustomLauncher('opera', 11, 'Windows XP');
-      // customLaunchers.SL_Opera12 = createCustomLauncher('opera', 12, 'Windows 7');
-    }
-
-    // IE
-    if (runAll || process.env.SAUCE_IE) {
-      customLaunchers.SL_IE11 = createCustomLauncher('internet explorer', 11, 'Windows 8.1');
-    }
-
-    // Edge
-    if (runAll || process.env.SAUCE_EDGE) {
-      customLaunchers.SL_Edge = createCustomLauncher('microsoftedge', null, 'Windows 10');
-    }
-
-    // IOS
-    if (runAll || process.env.SAUCE_IOS) {
-      // TODO IOS7 capture always timesout
-      // customLaunchers.SL_IOS7 = createCustomLauncher('iphone', '7.1', 'OS X 10.10');
-      // TODO Mobile browsers are causing failures, possibly from too many concurrent VMs
-      // customLaunchers.SL_IOS8 = createCustomLauncher('iphone', '8.4', 'OS X 10.10');
-      // customLaunchers.SL_IOS9 = createCustomLauncher('iphone', '9.2', 'OS X 10.10');
-    }
-
-    // Android
-    if (runAll || process.env.SAUCE_ANDROID) {
-      // TODO Mobile browsers are causing failures, possibly from too many concurrent VMs
-      // customLaunchers.SL_Android4 = createCustomLauncher('android', '4.4', 'Linux');
-      // customLaunchers.SL_Android5 = createCustomLauncher('android', '5.1', 'Linux');
-    }
-
-    browsers = Object.keys(customLaunchers);
-
-    sauceLabs = {
-      recordScreenshots: false,
-      connectOptions: {
-        // port: 5757,
-        logfile: 'sauce_connect.log',
-      },
-      public: 'public',
-    };
-  } else if (process.env.TRAVIS_PULL_REQUEST && process.env.TRAVIS_PULL_REQUEST !== 'false') {
-    console.log(
-      'Cannot run on Sauce Labs as encrypted environment variables are not available to PRs. ' +
-        'Running on Travis.'
-    );
-    browsers = ['Firefox'];
-  } else if (process.env.GITHUB_ACTIONS === 'true') {
-    console.log('Running ci on GitHub Actions.');
-    browsers = ['FirefoxHeadless', 'ChromeHeadless'];
-  } else {
-    browsers = browsers || ['Chrome'];
-    console.log(
-      `Running ${browsers} locally since SAUCE_USERNAME and SAUCE_ACCESS_KEY environment variables are not set.`
-    );
-  }
-
-  config.set({
-    // base path that will be used to resolve all patterns (eg. files, exclude)
-    basePath: '',
-
-    // frameworks to use
-    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
-    frameworks: ['jasmine-ajax', 'jasmine', 'sinon'],
-
-    // list of files / patterns to load in the browser
-    files: [
-      { pattern: 'test/specs/__helpers.js', watched: false },
-      { pattern: 'test/specs/**/*.spec.js', watched: false },
-    ],
-
-    // list of files to exclude
-    exclude: [],
-
-    // preprocess matching files before serving them to the browser
-    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
-    preprocessors: {
-      'test/specs/__helpers.js': ['rollup'],
-      'test/specs/**/*.spec.js': ['rollup'],
-    },
-
-    rollupPreprocessor: {
-      plugins: [resolve({ browser: true }), commonjs()],
-      output: {
-        format: 'iife',
-        name: '_axios',
-        sourcemap: 'inline',
-      },
-    },
-
-    // test results reporter to use
-    // possible values: 'dots', 'progress'
-    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
-    // Disable code coverage, as it's breaking CI:
-    // reporters: ['dots', 'coverage', 'saucelabs'],
-    reporters: ['progress'],
-
-    // web server port
-    port: 9876,
-
-    // Increase timeouts to prevent the issue with disconnected tests (https://goo.gl/nstA69)
-    captureTimeout: 4 * 60 * 1000,
-    browserDisconnectTimeout: 10000,
-    browserDisconnectTolerance: 1,
-    browserNoActivityTimeout: 4 * 60 * 1000,
-
-    // enable / disable colors in the output (reporters and logs)
-    colors: true,
-
-    // level of logging
-    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
-    logLevel: config.LOG_INFO,
-
-    // enable / disable watching file and executing tests whenever any file changes
-    autoWatch: false,
-
-    // start these browsers
-    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
-    browsers: browsers,
-
-    // Continuous Integration mode
-    // if true, Karma captures browsers, runs the tests and exits
-    singleRun: false,
-
-    // Webpack config
-    webpack: {
-      mode: 'development',
-      cache: true,
-      devtool: 'inline-source-map',
-      externals: [
-        {
-          './adapters/http': 'var undefined',
-        },
-      ],
-    },
-
-    webpackServer: {
-      stats: {
-        colors: true,
-      },
-    },
-
-    // Coverage reporting
-    coverageReporter: {
-      type: 'lcov',
-      dir: 'coverage/',
-      subdir: '.',
-    },
-
-    sauceLabs: sauceLabs,
-    customLaunchers: customLaunchers,
-  });
-};

package.json

@@ -45,28 +45,16 @@
   "type": "module",
   "types": "index.d.ts",
   "scripts": {
-    "test": "npm run test:node && npm run test:browser && npm run test:package",
+    "build": "gulp clear && cross-env NODE_ENV=production rollup -c -m",
-    "test:node": "npm run test:mocha",
+    "version": "npm run build && git add package.json",
-    "test:node:coverage": "c8 npm run test:mocha",
+    "preversion": "gulp version",
-    "test:browser": "npm run test:karma",
+    "test": "npm run test:vitest",
     "test:vitest": "vitest run",
     "test:vitest:unit": "vitest run --project unit",
     "test:vitest:browser": "vitest run --project browser",
     "test:vitest:browser:headless": "vitest run --project browser-headless",
     "test:vitest:watch": "vitest",
-    "test:package": "npm run test:eslint && npm run test:exports",
-    "test:eslint": "node bin/ssl_hotfix.js eslint lib/**/*.js",
-    "test:mocha": "node bin/ssl_hotfix.js mocha test/unit/**/*.js --timeout 30000 --exit",
-    "test:exports": "node bin/ssl_hotfix.js mocha test/module/test.js --timeout 30000 --exit",
-    "test:karma": "node ./bin/run-karma-tests.js",
-    "test:karma:firefox": "node bin/ssl_hotfix.js cross-env LISTEN_ADDR=:: Browsers=Firefox karma start karma.conf.cjs --single-run",
-    "test:karma:server": "node bin/ssl_hotfix.js cross-env karma start karma.conf.cjs",
-    "test:build:version": "node ./bin/check-build-version.js",
     "start": "node ./sandbox/server.js",
-    "preversion": "gulp version",
-    "version": "npm run build && git add package.json",
-    "prepublishOnly": "npm run test:build:version",
-    "build": "gulp clear && cross-env NODE_ENV=production rollup -c -m",
     "examples": "node ./examples/server.js",
     "fix": "eslint --fix lib/**/*.js",
     "prepare": "husky install && npm run prepare:hooks",

tests/README.md

@@ -0,0 +1,110 @@
+# Test Contribution Guide
+
+This guide explains how to contribute tests inside the `tests` directory.
+It is intentionally scoped to this directory only.
+
+## Tests Directory Layout
+
+```text
+tests/
+  browser/   # browser runtime tests
+  setup/     # shared test setup utilities
+  smoke/     # package-compat smoke suites (esm + cjs)
+  unit/      # focused unit/behavior tests
+```
+
+Use the runtime-first layout already present in this directory:
+
+- Put browser-runtime behavior in `tests/browser`.
+- Put non-browser focused tests in `tests/unit`.
+- Put packaging/compatibility smoke checks in `tests/smoke/esm/tests` and `tests/smoke/cjs/tests`.
+- Reuse helpers from `tests/setup` instead of duplicating setup logic.
+
+## File Naming Conventions
+
+Follow the existing file patterns:
+
+- Unit tests: `*.test.js`
+- Browser tests: `*.browser.test.js`
+- ESM smoke tests: `*.smoke.test.js`
+- CJS smoke tests: `*.smoke.test.cjs`
+
+When adding a new test, match the nearest existing file name pattern in the same subdirectory.
+
+## Suite-Specific Authoring Patterns
+
+### Unit (`tests/unit`)
+
+- Keep tests focused on one behavior or API surface.
+- For adapter/network behavior, prefer local test servers using utilities from `tests/setup/server.js`.
+- Ensure server cleanup with `try/finally` so tests do not leak resources.
+- Keep fixtures close to the tests that use them (see `tests/unit/adapters` for examples).
+
+Representative files:
+
+- `tests/unit/adapters/http.test.js`
+- `tests/unit/adapters/fetch.test.js`
+- `tests/unit/regression.test.js`
+
+### Browser (`tests/browser`)
+
+- Use local in-file `MockXMLHttpRequest` style mocks when testing request behavior.
+- Replace global XHR in `beforeEach` and restore it in `afterEach`.
+- Reset spies/mocks in cleanup hooks to keep tests isolated.
+- Keep assertions centered on observable request/response behavior.
+
+Representative files:
+
+- `tests/browser/requests.browser.test.js`
+- `tests/browser/adapter.browser.test.js`
+- `tests/browser/defaults.browser.test.js`
+
+### Smoke (`tests/smoke`)
+
+- Keep ESM and CJS smoke coverage aligned for compatibility-sensitive behavior.
+- If you add a new smoke scenario in one format, add the equivalent in the other format.
+- Keep smoke tests small and focused on import/runtime behavior and critical request flows.
+
+Representative files:
+
+- `tests/smoke/esm/tests/fetch.smoke.test.js`
+- `tests/smoke/cjs/tests/fetch.smoke.test.cjs`
+- `tests/smoke/esm/tests/basic.smoke.test.js`
+- `tests/smoke/cjs/tests/basic.smoke.test.cjs`
+
+## Shared Setup Utilities (`tests/setup`)
+
+Use shared helpers before introducing new setup code:
+
+- `tests/setup/server.js`
+  - Server lifecycle helpers: `startHTTPServer`, `stopHTTPServer`, `stopAllTrackedHTTPServers`
+  - Timing helpers: `setTimeoutAsync`
+  - Data/stream helpers used by adapter tests
+- `tests/setup/browser.setup.js`
+  - Browser cleanup hook (`afterEach`) for clearing test DOM state
+
+General expectation: if a helper can be reused by multiple tests in this directory, add or extend it in `tests/setup` instead of copying setup code between test files.
+
+## Fixtures and Test Data
+
+- Prefer colocated fixtures near the test files that need them.
+- Keep fixture names explicit and stable.
+- For matrix-like scenarios, prefer concise table-driven cases inside the test file when practical.
+
+Examples of colocated fixtures:
+
+- `tests/unit/adapters/cert.pem`
+- `tests/unit/adapters/key.pem`
+- `tests/unit/adapters/axios.png`
+
+## Contributor Checklist
+
+Before opening a PR for tests in this directory:
+
+- File is placed in the correct suite directory (`unit`, `browser`, or `smoke`).
+- File name matches the local pattern (`*.test.js`, `*.browser.test.js`, `*.smoke.test.js`, `*.smoke.test.cjs`).
+- Test setup/teardown is explicit and leaves no global/server state behind.
+- Shared setup logic uses `tests/setup` helpers where possible.
+- Smoke tests remain ESM/CJS consistent when behavior is format-sensitive.
+- Fixtures are colocated and minimal.
+- Assertions are deterministic and avoid unnecessary timing/network flakiness.