skip pypy tests on mypy

see python/typed_ast#111

Author: selimb

setup.py

@@ -18,7 +18,7 @@
     ':python_version == "3.6"': ["dataclasses"],
     "lint": ["pre-commit~=1.18"],
     "docs": ["sphinx"],
-    "tests": ["mypy"],
+    "tests": ["mypy; implementation_name != 'pypy'"],
 }
 EXTRAS_REQUIRE["dev"] = (
     EXTRAS_REQUIRE["enum"]

tests/test_mypy.py

@@ -3,7 +3,12 @@
 import os
 import unittest
 
-import mypy.api
+mypy_installed = True
+try:
+    import mypy.api
+except ImportError:
+    # mypy not installed on pypy (see setup.py)
+    mypy_installed = False
 
 HERE = os.path.dirname(__file__)
 TEST_OUTPUT_DIR = os.path.join(HERE, "test-output")
@@ -14,6 +19,7 @@
 """
 
 
+@unittest.skipUnless(mypy_installed, "mypy required")
 class TestMypyPlugin(unittest.TestCase):
     maxDiff = None