Only make sure mypy cache is up to date once

A5rocks · A5rocks · commit 1f75b1f9abc1 · 2023-06-24T07:09:25.000+09:00
diff --git a/trio/_tests/test_exports.py b/trio/_tests/test_exports.py
@@ -18,6 +18,8 @@
 from .._core._tests.tutil import slow
 from .pytest_plugin import RUN_SLOW
 
+mypy_cache_updated = False
+
 
 def test_core_is_properly_reexported():
     # Each export from _core should be re-exported by exactly one of these
@@ -72,6 +74,7 @@ def public_modules(module):
     "ignore:module 'sre_constants' is deprecated:DeprecationWarning",
 )
 def test_static_tool_sees_all_symbols(tool, modname, tmpdir):
+    global mypy_cache_updated
     module = importlib.import_module(modname)
 
     def no_underscores(symbols):
@@ -113,7 +116,16 @@ def no_underscores(symbols):
         from mypy.api import run
 
         # This pollutes the `empty` dir. Should this be changed?
-        run(["--config-file=", "--cache-dir=./.mypy_cache", "-c", f"import {modname}"])
+        if not mypy_cache_updated:
+            run(
+                [
+                    "--config-file=",
+                    "--cache-dir=./.mypy_cache",
+                    "-c",
+                    f"import {modname}",
+                ]
+            )
+            mypy_cache_updated = True
 
         trio_cache = next(cache.glob("*/trio"))
         _, modname = (modname + ".").split(".", 1)
@@ -197,6 +209,7 @@ def no_underscores(symbols):
 @pytest.mark.parametrize("module_name", PUBLIC_MODULE_NAMES)
 @pytest.mark.parametrize("tool", ["jedi", "mypy"])
 def test_static_tool_sees_class_members(tool, module_name, tmpdir) -> None:
+    global mypy_cache_updated
     module = PUBLIC_MODULES[PUBLIC_MODULE_NAMES.index(module_name)]
 
     # ignore hidden, but not dunder, symbols
@@ -222,14 +235,16 @@ def no_hidden(symbols):
         from mypy.api import run
 
         # This pollutes the `empty` dir. Should this be changed?
-        run(
-            [
-                "--config-file=",
-                "--cache-dir=./.mypy_cache",
-                "-c",
-                f"import {module_name}",
-            ]
-        )
+        if not mypy_cache_updated:
+            run(
+                [
+                    "--config-file=",
+                    "--cache-dir=./.mypy_cache",
+                    "-c",
+                    f"import {module_name}",
+                ]
+            )
+            mypy_cache_updated = False
 
         trio_cache = next(cache.glob("*/trio"))
         modname = module_name
