Test run black on self (#3114)

* Add run_self environment in tox

* Add run_self task as part of the lint CI flow

* Remove hard coded sources list

* Remove black from pre-commit

Co-authored-by: Cooper Lees <me@cooperlees.com>

.github/workflows/lint.yml

@@ -25,6 +25,11 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -e '.[d]'
+          python -m pip install tox
 
       - name: Lint
         uses: pre-commit/action@v3.0.0
+
+      - name: Run On Self
+        run: |
+          tox -e run_self

.pre-commit-config.yaml

@@ -4,14 +4,6 @@ exclude: ^(src/blib2to3/|profiling/|tests/data/)
 repos:
   - repo: local
     hooks:
-      - id: black
-        name: black
-        language: system
-        entry: black
-        minimum_pre_commit_version: 2.9.2
-        require_serial: true
-        types_or: [python, pyi]
-
       - id: check-pre-commit-rev-in-example
         name: Check pre-commit rev in example
         language: python

tests/test_format.py

@@ -1,5 +1,5 @@
 from dataclasses import replace
-from typing import Any, Iterator, List
+from typing import Any, Iterator
 from unittest.mock import patch
 
 import pytest
@@ -14,47 +14,6 @@
     all_data_cases,
 )
 
-SOURCES: List[str] = [
-    "src/black/__init__.py",
-    "src/black/__main__.py",
-    "src/black/brackets.py",
-    "src/black/cache.py",
-    "src/black/comments.py",
-    "src/black/concurrency.py",
-    "src/black/const.py",
-    "src/black/debug.py",
-    "src/black/files.py",
-    "src/black/linegen.py",
-    "src/black/lines.py",
-    "src/black/mode.py",
-    "src/black/nodes.py",
-    "src/black/numerics.py",
-    "src/black/output.py",
-    "src/black/parsing.py",
-    "src/black/report.py",
-    "src/black/rusty.py",
-    "src/black/strings.py",
-    "src/black/trans.py",
-    "src/blackd/__init__.py",
-    "src/blib2to3/pygram.py",
-    "src/blib2to3/pytree.py",
-    "src/blib2to3/pgen2/conv.py",
-    "src/blib2to3/pgen2/driver.py",
-    "src/blib2to3/pgen2/grammar.py",
-    "src/blib2to3/pgen2/literals.py",
-    "src/blib2to3/pgen2/parse.py",
-    "src/blib2to3/pgen2/pgen.py",
-    "src/blib2to3/pgen2/tokenize.py",
-    "src/blib2to3/pgen2/token.py",
-    "setup.py",
-    "tests/test_black.py",
-    "tests/test_blackd.py",
-    "tests/test_format.py",
-    "tests/optional.py",
-    "tests/util.py",
-    "tests/conftest.py",
-]
-
 
 @pytest.fixture(autouse=True)
 def patch_dump_to_file(request: Any) -> Iterator[None]:
@@ -93,11 +52,6 @@ def test_preview_minimum_python_310_format(filename: str) -> None:
     assert_format(source, expected, mode, minimum_version=(3, 10))
 
 
-@pytest.mark.parametrize("filename", SOURCES)
-def test_source_is_formatted(filename: str) -> None:
-    check_file("", filename, DEFAULT_MODE, data=False)
-
-
 # =============== #
 # Complex cases
 # ============= #

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = {,ci-}py{36,37,38,39,310,py3},fuzz
+envlist = {,ci-}py{36,37,38,39,310,py3},fuzz,run_self
 
 [testenv]
 setenv = PYTHONPATH = {toxinidir}/src
@@ -61,3 +61,10 @@ commands =
     coverage erase
     coverage run fuzz.py
     coverage report
+
+[testenv:run_self]
+setenv = PYTHONPATH = {toxinidir}/src
+skip_install = True
+commands =
+    pip install -e .[d]
+    black --check {toxinidir}/src {toxinidir}/tests {toxinidir}/setup.py