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Make README logo link to docs (#3285)
[etc/vim.git] / tests / test_blackd.py
diff --git a/tests/test_blackd.py b/tests/test_blackd.py
index 8e739063f6e50c908105cfab832df1b7c2dc4445..511bd86441d81aebc9710f8e489d589df772641c 100644 (file)
--- a/tests/test_blackd.py
+++ b/tests/test_blackd.py
@@ -1,6 +1,5 @@
 import re
 import re
-import sys
-from typing import Any
+from typing import TYPE_CHECKING, Any, Callable, TypeVar
 from unittest.mock import patch
 
 import pytest
 from unittest.mock import patch
 
 import pytest
@@ -8,201 +7,205 @@ from click.testing import CliRunner
 
 from tests.util import DETERMINISTIC_HEADER, read_data
 
 
 from tests.util import DETERMINISTIC_HEADER, read_data
 
-LESS_THAN_311 = sys.version_info < (3, 11)
+try:
+    from aiohttp import web
+    from aiohttp.test_utils import AioHTTPTestCase
 
 
-if LESS_THAN_311:  # noqa: C901
-    try:
-        from aiohttp import web
-        from aiohttp.test_utils import AioHTTPTestCase
+    import blackd
+except ImportError as e:
+    raise RuntimeError("Please install Black with the 'd' extra") from e
 
 
-        import blackd
-    except ImportError as e:
-        raise RuntimeError("Please install Black with the 'd' extra") from e
+if TYPE_CHECKING:
+    F = TypeVar("F", bound=Callable[..., Any])
 
 
+    unittest_run_loop: Callable[[F], F] = lambda x: x
+else:
     try:
         from aiohttp.test_utils import unittest_run_loop
     except ImportError:
     try:
         from aiohttp.test_utils import unittest_run_loop
     except ImportError:
-        # unittest_run_loop is unnecessary and a no-op since aiohttp 3.8, and aiohttp 4
-        # removed it. To maintain compatibility we can make our own no-op decorator.
-        def unittest_run_loop(func: Any, *args: Any, **kwargs: Any) -> Any:
+        # unittest_run_loop is unnecessary and a no-op since aiohttp 3.8, and
+        # aiohttp 4 removed it. To maintain compatibility we can make our own
+        # no-op decorator.
+        def unittest_run_loop(func, *args, **kwargs):
             return func
 
             return func
 
-    @pytest.mark.blackd
-    class BlackDTestCase(AioHTTPTestCase):
-        def test_blackd_main(self) -> None:
-            with patch("blackd.web.run_app"):
-                result = CliRunner().invoke(blackd.main, [])
-                if result.exception is not None:
-                    raise result.exception
-                self.assertEqual(result.exit_code, 0)
-
-        async def get_application(self) -> web.Application:
-            return blackd.make_app()
-
-        @unittest_run_loop
-        async def test_blackd_request_needs_formatting(self) -> None:
-            response = await self.client.post("/", data=b"print('hello world')")
-            self.assertEqual(response.status, 200)
-            self.assertEqual(response.charset, "utf8")
-            self.assertEqual(await response.read(), b'print("hello world")\n')
-
-        @unittest_run_loop
-        async def test_blackd_request_no_change(self) -> None:
-            response = await self.client.post("/", data=b'print("hello world")\n')
-            self.assertEqual(response.status, 204)
-            self.assertEqual(await response.read(), b"")
-
-        @unittest_run_loop
-        async def test_blackd_request_syntax_error(self) -> None:
-            response = await self.client.post("/", data=b"what even ( is")
-            self.assertEqual(response.status, 400)
-            content = await response.text()
-            self.assertTrue(
-                content.startswith("Cannot parse"),
-                msg=f"Expected error to start with 'Cannot parse', got {repr(content)}",
-            )
-
-        @unittest_run_loop
-        async def test_blackd_unsupported_version(self) -> None:
-            response = await self.client.post(
-                "/", data=b"what", headers={blackd.PROTOCOL_VERSION_HEADER: "2"}
-            )
-            self.assertEqual(response.status, 501)
-
-        @unittest_run_loop
-        async def test_blackd_supported_version(self) -> None:
-            response = await self.client.post(
-                "/", data=b"what", headers={blackd.PROTOCOL_VERSION_HEADER: "1"}
-            )
-            self.assertEqual(response.status, 200)
-
-        @unittest_run_loop
-        async def test_blackd_invalid_python_variant(self) -> None:
-            async def check(header_value: str, expected_status: int = 400) -> None:
-                response = await self.client.post(
-                    "/",
-                    data=b"what",
-                    headers={blackd.PYTHON_VARIANT_HEADER: header_value},
-                )
-                self.assertEqual(response.status, expected_status)
-
-            await check("lol")
-            await check("ruby3.5")
-            await check("pyi3.6")
-            await check("py1.5")
-            await check("2")
-            await check("2.7")
-            await check("py2.7")
-            await check("2.8")
-            await check("py2.8")
-            await check("3.0")
-            await check("pypy3.0")
-            await check("jython3.4")
-
-        @unittest_run_loop
-        async def test_blackd_pyi(self) -> None:
-            source, expected = read_data("miscellaneous", "stub.pyi")
-            response = await self.client.post(
-                "/", data=source, headers={blackd.PYTHON_VARIANT_HEADER: "pyi"}
-            )
-            self.assertEqual(response.status, 200)
-            self.assertEqual(await response.text(), expected)
-
-        @unittest_run_loop
-        async def test_blackd_diff(self) -> None:
-            diff_header = re.compile(
-                r"(In|Out)\t\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
-            )
-
-            source, _ = read_data("miscellaneous", "blackd_diff")
-            expected, _ = read_data("miscellaneous", "blackd_diff.diff")
 
 
-            response = await self.client.post(
-                "/", data=source, headers={blackd.DIFF_HEADER: "true"}
-            )
-            self.assertEqual(response.status, 200)
-
-            actual = await response.text()
-            actual = diff_header.sub(DETERMINISTIC_HEADER, actual)
-            self.assertEqual(actual, expected)
-
-        @unittest_run_loop
-        async def test_blackd_python_variant(self) -> None:
-            code = (
-                "def f(\n"
-                "    and_has_a_bunch_of,\n"
-                "    very_long_arguments_too,\n"
-                "    and_lots_of_them_as_well_lol,\n"
-                "    **and_very_long_keyword_arguments\n"
-                "):\n"
-                "    pass\n"
-            )
-
-            async def check(header_value: str, expected_status: int) -> None:
-                response = await self.client.post(
-                    "/", data=code, headers={blackd.PYTHON_VARIANT_HEADER: header_value}
-                )
-                self.assertEqual(
-                    response.status, expected_status, msg=await response.text()
-                )
-
-            await check("3.6", 200)
-            await check("py3.6", 200)
-            await check("3.6,3.7", 200)
-            await check("3.6,py3.7", 200)
-            await check("py36,py37", 200)
-            await check("36", 200)
-            await check("3.6.4", 200)
-            await check("3.4", 204)
-            await check("py3.4", 204)
-            await check("py34,py36", 204)
-            await check("34", 204)
-
-        @unittest_run_loop
-        async def test_blackd_line_length(self) -> None:
-            response = await self.client.post(
-                "/", data=b'print("hello")\n', headers={blackd.LINE_LENGTH_HEADER: "7"}
-            )
-            self.assertEqual(response.status, 200)
-
-        @unittest_run_loop
-        async def test_blackd_invalid_line_length(self) -> None:
+@pytest.mark.blackd
+class BlackDTestCase(AioHTTPTestCase):  # type: ignore[misc]
+    def test_blackd_main(self) -> None:
+        with patch("blackd.web.run_app"):
+            result = CliRunner().invoke(blackd.main, [])
+            if result.exception is not None:
+                raise result.exception
+            self.assertEqual(result.exit_code, 0)
+
+    async def get_application(self) -> web.Application:
+        return blackd.make_app()
+
+    @unittest_run_loop
+    async def test_blackd_request_needs_formatting(self) -> None:
+        response = await self.client.post("/", data=b"print('hello world')")
+        self.assertEqual(response.status, 200)
+        self.assertEqual(response.charset, "utf8")
+        self.assertEqual(await response.read(), b'print("hello world")\n')
+
+    @unittest_run_loop
+    async def test_blackd_request_no_change(self) -> None:
+        response = await self.client.post("/", data=b'print("hello world")\n')
+        self.assertEqual(response.status, 204)
+        self.assertEqual(await response.read(), b"")
+
+    @unittest_run_loop
+    async def test_blackd_request_syntax_error(self) -> None:
+        response = await self.client.post("/", data=b"what even ( is")
+        self.assertEqual(response.status, 400)
+        content = await response.text()
+        self.assertTrue(
+            content.startswith("Cannot parse"),
+            msg=f"Expected error to start with 'Cannot parse', got {repr(content)}",
+        )
+
+    @unittest_run_loop
+    async def test_blackd_unsupported_version(self) -> None:
+        response = await self.client.post(
+            "/", data=b"what", headers={blackd.PROTOCOL_VERSION_HEADER: "2"}
+        )
+        self.assertEqual(response.status, 501)
+
+    @unittest_run_loop
+    async def test_blackd_supported_version(self) -> None:
+        response = await self.client.post(
+            "/", data=b"what", headers={blackd.PROTOCOL_VERSION_HEADER: "1"}
+        )
+        self.assertEqual(response.status, 200)
+
+    @unittest_run_loop
+    async def test_blackd_invalid_python_variant(self) -> None:
+        async def check(header_value: str, expected_status: int = 400) -> None:
             response = await self.client.post(
                 "/",
             response = await self.client.post(
                 "/",
-                data=b'print("hello")\n',
-                headers={blackd.LINE_LENGTH_HEADER: "NaN"},
+                data=b"what",
+                headers={blackd.PYTHON_VARIANT_HEADER: header_value},
             )
             )
-            self.assertEqual(response.status, 400)
-
-        @unittest_run_loop
-        async def test_blackd_preview(self) -> None:
+            self.assertEqual(response.status, expected_status)
+
+        await check("lol")
+        await check("ruby3.5")
+        await check("pyi3.6")
+        await check("py1.5")
+        await check("2")
+        await check("2.7")
+        await check("py2.7")
+        await check("2.8")
+        await check("py2.8")
+        await check("3.0")
+        await check("pypy3.0")
+        await check("jython3.4")
+
+    @unittest_run_loop
+    async def test_blackd_pyi(self) -> None:
+        source, expected = read_data("miscellaneous", "stub.pyi")
+        response = await self.client.post(
+            "/", data=source, headers={blackd.PYTHON_VARIANT_HEADER: "pyi"}
+        )
+        self.assertEqual(response.status, 200)
+        self.assertEqual(await response.text(), expected)
+
+    @unittest_run_loop
+    async def test_blackd_diff(self) -> None:
+        diff_header = re.compile(
+            r"(In|Out)\t\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d\d\d\d \+\d\d\d\d"
+        )
+
+        source, _ = read_data("miscellaneous", "blackd_diff")
+        expected, _ = read_data("miscellaneous", "blackd_diff.diff")
+
+        response = await self.client.post(
+            "/", data=source, headers={blackd.DIFF_HEADER: "true"}
+        )
+        self.assertEqual(response.status, 200)
+
+        actual = await response.text()
+        actual = diff_header.sub(DETERMINISTIC_HEADER, actual)
+        self.assertEqual(actual, expected)
+
+    @unittest_run_loop
+    async def test_blackd_python_variant(self) -> None:
+        code = (
+            "def f(\n"
+            "    and_has_a_bunch_of,\n"
+            "    very_long_arguments_too,\n"
+            "    and_lots_of_them_as_well_lol,\n"
+            "    **and_very_long_keyword_arguments\n"
+            "):\n"
+            "    pass\n"
+        )
+
+        async def check(header_value: str, expected_status: int) -> None:
             response = await self.client.post(
             response = await self.client.post(
-                "/", data=b'print("hello")\n', headers={blackd.PREVIEW: "true"}
+                "/", data=code, headers={blackd.PYTHON_VARIANT_HEADER: header_value}
             )
             )
-            self.assertEqual(response.status, 204)
-
-        @unittest_run_loop
-        async def test_blackd_response_black_version_header(self) -> None:
-            response = await self.client.post("/")
-            self.assertIsNotNone(response.headers.get(blackd.BLACK_VERSION_HEADER))
-
-        @unittest_run_loop
-        async def test_cors_preflight(self) -> None:
-            response = await self.client.options(
-                "/",
-                headers={
-                    "Access-Control-Request-Method": "POST",
-                    "Origin": "*",
-                    "Access-Control-Request-Headers": "Content-Type",
-                },
+            self.assertEqual(
+                response.status, expected_status, msg=await response.text()
             )
             )
-            self.assertEqual(response.status, 200)
-            self.assertIsNotNone(response.headers.get("Access-Control-Allow-Origin"))
-            self.assertIsNotNone(response.headers.get("Access-Control-Allow-Headers"))
-            self.assertIsNotNone(response.headers.get("Access-Control-Allow-Methods"))
-
-        @unittest_run_loop
-        async def test_cors_headers_present(self) -> None:
-            response = await self.client.post("/", headers={"Origin": "*"})
-            self.assertIsNotNone(response.headers.get("Access-Control-Allow-Origin"))
-            self.assertIsNotNone(response.headers.get("Access-Control-Expose-Headers"))
+
+        await check("3.6", 200)
+        await check("py3.6", 200)
+        await check("3.6,3.7", 200)
+        await check("3.6,py3.7", 200)
+        await check("py36,py37", 200)
+        await check("36", 200)
+        await check("3.6.4", 200)
+        await check("3.4", 204)
+        await check("py3.4", 204)
+        await check("py34,py36", 204)
+        await check("34", 204)
+
+    @unittest_run_loop
+    async def test_blackd_line_length(self) -> None:
+        response = await self.client.post(
+            "/", data=b'print("hello")\n', headers={blackd.LINE_LENGTH_HEADER: "7"}
+        )
+        self.assertEqual(response.status, 200)
+
+    @unittest_run_loop
+    async def test_blackd_invalid_line_length(self) -> None:
+        response = await self.client.post(
+            "/",
+            data=b'print("hello")\n',
+            headers={blackd.LINE_LENGTH_HEADER: "NaN"},
+        )
+        self.assertEqual(response.status, 400)
+
+    @unittest_run_loop
+    async def test_blackd_preview(self) -> None:
+        response = await self.client.post(
+            "/", data=b'print("hello")\n', headers={blackd.PREVIEW: "true"}
+        )
+        self.assertEqual(response.status, 204)
+
+    @unittest_run_loop
+    async def test_blackd_response_black_version_header(self) -> None:
+        response = await self.client.post("/")
+        self.assertIsNotNone(response.headers.get(blackd.BLACK_VERSION_HEADER))
+
+    @unittest_run_loop
+    async def test_cors_preflight(self) -> None:
+        response = await self.client.options(
+            "/",
+            headers={
+                "Access-Control-Request-Method": "POST",
+                "Origin": "*",
+                "Access-Control-Request-Headers": "Content-Type",
+            },
+        )
+        self.assertEqual(response.status, 200)
+        self.assertIsNotNone(response.headers.get("Access-Control-Allow-Origin"))
+        self.assertIsNotNone(response.headers.get("Access-Control-Allow-Headers"))
+        self.assertIsNotNone(response.headers.get("Access-Control-Allow-Methods"))
+
+    @unittest_run_loop
+    async def test_cors_headers_present(self) -> None:
+        response = await self.client.post("/", headers={"Origin": "*"})
+        self.assertIsNotNone(response.headers.get("Access-Control-Allow-Origin"))
+        self.assertIsNotNone(response.headers.get("Access-Control-Expose-Headers"))
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