[devscripts] `run_tests`: Create Python script (#8720)

Authored by: Grub4K

.github/workflows/core.yml

@@ -38,18 +38,14 @@ jobs:
         os: [ubuntu-latest]
         # CPython 3.11 is in quick-test
         python-version: ['3.8', '3.9', '3.10', '3.12', pypy-3.8, pypy-3.10]
-        run-tests-ext: [sh]
         include:
         # atleast one of each CPython/PyPy tests must be in windows
         - os: windows-latest
           python-version: '3.8'
-          run-tests-ext: bat
         - os: windows-latest
           python-version: '3.12'
-          run-tests-ext: bat
         - os: windows-latest
           python-version: pypy-3.9
-          run-tests-ext: bat
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
@@ -62,4 +58,4 @@ jobs:
       continue-on-error: False
       run: |
         python3 -m yt_dlp -v || true  # Print debug head
-        ./devscripts/run_tests.${{ matrix.run-tests-ext }} core
+        python3 ./devscripts/run_tests.py core

.github/workflows/download.yml

@@ -18,7 +18,7 @@ jobs:
       run: pip install pytest -r requirements.txt
     - name: Run tests
       continue-on-error: true
-      run: ./devscripts/run_tests.sh download
+      run: python3 ./devscripts/run_tests.py download
 
   full:
     name: Full Download Tests
@@ -29,15 +29,12 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: ['3.10', '3.11', '3.12', pypy-3.8, pypy-3.10]
-        run-tests-ext: [sh]
         include:
         # atleast one of each CPython/PyPy tests must be in windows
         - os: windows-latest
           python-version: '3.8'
-          run-tests-ext: bat
         - os: windows-latest
           python-version: pypy-3.9
-          run-tests-ext: bat
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
@@ -48,4 +45,4 @@ jobs:
       run: pip install pytest -r requirements.txt
     - name: Run tests
       continue-on-error: true
-      run: ./devscripts/run_tests.${{ matrix.run-tests-ext }} download
+      run: python3 ./devscripts/run_tests.py download

.github/workflows/quick-test.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Run tests
       run: |
         python3 -m yt_dlp -v || true
-        ./devscripts/run_tests.sh core
+        python3 ./devscripts/run_tests.py core
   flake8:
     name: Linter
     if: "!contains(github.event.head_commit.message, 'ci skip all')"

CONTRIBUTING.md

@@ -140,12 +140,9 @@ To run yt-dlp as a developer, you don't need to build anything either. Simply ex
 
     python -m yt_dlp
 
-To run the test, simply invoke your favorite test runner, or execute a test file directly; any of the following work:
+To run all the available core tests, use:
 
-    python -m unittest discover
+    python devscripts/run_tests.py
-    python test/test_download.py
-    nosetests
-    pytest
 
 See item 6 of [new extractor tutorial](#adding-support-for-a-new-site) for how to run extractor specific test cases.
 
@@ -187,15 +184,21 @@ After you have ensured this site is distributing its content legally, you can fo
             'url': 'https://yourextractor.com/watch/42',
             'md5': 'TODO: md5 sum of the first 10241 bytes of the video file (use --test)',
             'info_dict': {
+                # For videos, only the 'id' and 'ext' fields are required to RUN the test:
                 'id': '42',
                 'ext': 'mp4',
-                'title': 'Video title goes here',
+                # Then if the test run fails, it will output the missing/incorrect fields.
-                'thumbnail': r're:^https?://.*\.jpg$',
+                # Properties can be added as:
-                # TODO more properties, either as:
+                # * A value, e.g.
-                # * A value
+                #     'title': 'Video title goes here',
-                # * MD5 checksum; start the string with md5:
+                # * MD5 checksum; start the string with 'md5:', e.g.
-                # * A regular expression; start the string with re:
+                #     'description': 'md5:098f6bcd4621d373cade4e832627b4f6',
-                # * Any Python type, e.g. int or float
+                # * A regular expression; start the string with 're:', e.g.
+                #     'thumbnail': r're:^https?://.*\.jpg$',
+                # * A count of elements in a list; start the string with 'count:', e.g.
+                #     'tags': 'count:10',
+                # * Any Python type, e.g.
+                #     'view_count': int,
             }
         }]
 
@@ -215,8 +218,8 @@ After you have ensured this site is distributing its content legally, you can fo
             }
     ```
 1. Add an import in [`yt_dlp/extractor/_extractors.py`](yt_dlp/extractor/_extractors.py). Note that the class name must end with `IE`.
-1. Run `python test/test_download.py TestDownload.test_YourExtractor` (note that `YourExtractor` doesn't end with `IE`). This *should fail* at first, but you can continually re-run it until you're done. If you decide to add more than one test, the tests will then be named `TestDownload.test_YourExtractor`, `TestDownload.test_YourExtractor_1`, `TestDownload.test_YourExtractor_2`, etc. Note that tests with `only_matching` key in test's dict are not counted in. You can also run all the tests in one go with `TestDownload.test_YourExtractor_all`
+1. Run `python devscripts/run_tests.py YourExtractor`. This *may fail* at first, but you can continually re-run it until you're done. Upon failure, it will output the missing fields and/or correct values which you can copy. If you decide to add more than one test, the tests will then be named `YourExtractor`, `YourExtractor_1`, `YourExtractor_2`, etc. Note that tests with an `only_matching` key in the test's dict are not included in the count. You can also run all the tests in one go with `YourExtractor_all`
-1. Make sure you have atleast one test for your extractor. Even if all videos covered by the extractor are expected to be inaccessible for automated testing, tests should still be added with a `skip` parameter indicating why the particular test is disabled from running.
+1. Make sure you have at least one test for your extractor. Even if all videos covered by the extractor are expected to be inaccessible for automated testing, tests should still be added with a `skip` parameter indicating why the particular test is disabled from running.
 1. Have a look at [`yt_dlp/extractor/common.py`](yt_dlp/extractor/common.py) for possible helper methods and a [detailed description of what your extractor should and may return](yt_dlp/extractor/common.py#L119-L440). Add tests and code for as many as you want.
 1. Make sure your code follows [yt-dlp coding conventions](#yt-dlp-coding-conventions) and check the code with [flake8](https://flake8.pycqa.org/en/latest/index.html#quickstart):
 

devscripts/run_tests.bat

@@ -1,17 +1,4 @@
-@setlocal
 @echo off
-cd /d %~dp0..
 
-if ["%~1"]==[""] (
+>&2 echo run_tests.bat is deprecated. Please use `devscripts/run_tests.py` instead
-    set "test_set="test""
+python %~dp0run_tests.py %~1
-) else if ["%~1"]==["core"] (
-    set "test_set="-m not download""
-) else if ["%~1"]==["download"] (
-    set "test_set="-m "download""
-) else (
-    echo.Invalid test type "%~1". Use "core" ^| "download"
-    exit /b 1
-)
-
-set PYTHONWARNINGS=error
-pytest %test_set%

devscripts/run_tests.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+
+import argparse
+import functools
+import os
+import re
+import subprocess
+import sys
+from pathlib import Path
+
+
+fix_test_name = functools.partial(re.compile(r'IE(_all|_\d+)?$').sub, r'\1')
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(description='Run selected yt-dlp tests')
+    parser.add_argument(
+        'test', help='a extractor tests, or one of "core" or "download"', nargs='*')
+    parser.add_argument(
+        '-k', help='run a test matching EXPRESSION. Same as "pytest -k"', metavar='EXPRESSION')
+    return parser.parse_args()
+
+
+def run_tests(*tests, pattern=None):
+    run_core = 'core' in tests or (not pattern and not tests)
+    run_download = 'download' in tests
+    tests = list(map(fix_test_name, tests))
+
+    arguments = ['pytest', '-Werror', '--tb', 'short']
+    if run_core:
+        arguments.extend(['-m', 'not download'])
+    elif run_download:
+        arguments.extend(['-m', 'download'])
+    elif pattern:
+        arguments.extend(['-k', pattern])
+    else:
+        arguments.extend(
+            f'test/test_download.py::TestDownload::test_{test}' for test in tests)
+
+    print(f'Running {arguments}')
+    try:
+        subprocess.run(arguments)
+        return
+    except FileNotFoundError:
+        pass
+
+    arguments = [sys.executable, '-Werror', '-m', 'unittest']
+    if run_core:
+        print('"pytest" needs to be installed to run core tests', file=sys.stderr)
+        return
+    elif run_download:
+        arguments.append('test.test_download')
+    elif pattern:
+        arguments.extend(['-k', pattern])
+    else:
+        arguments.extend(
+            f'test.test_download.TestDownload.test_{test}' for test in tests)
+
+    print(f'Running {arguments}')
+    subprocess.run(arguments)
+
+
+if __name__ == '__main__':
+    try:
+        args = parse_args()
+
+        os.chdir(Path(__file__).parent.parent)
+        run_tests(*args.test, pattern=args.k)
+    except KeyboardInterrupt:
+        pass

devscripts/run_tests.sh

@@ -1,14 +1,4 @@
 #!/usr/bin/env sh
 
-if [ -z "$1" ]; then
+>&2 echo 'run_tests.sh is deprecated. Please use `devscripts/run_tests.py` instead'
-    test_set='test'
+python3 devscripts/run_tests.py "$1"
-elif [ "$1" = 'core' ]; then
-    test_set="-m not download"
-elif [ "$1" = 'download' ]; then
-    test_set="-m download"
-else
-    echo 'Invalid test type "'"$1"'". Use "core" | "download"'
-    exit 1
-fi
-
-python3 -bb -Werror -m pytest "$test_set"