Add some tests for Mingw32CCompiler class

distutils/tests/test_mingwccompiler.py

@@ -0,0 +1,45 @@
+import pytest
+
+from distutils.util import split_quoted, is_mingw
+from distutils.errors import DistutilsPlatformError, CCompilerError
+
+
+class TestMingw32CCompiler:
+    @pytest.mark.skipif(not is_mingw(), reason='not on mingw')
+    def test_compiler_type(self):
+        from distutils.cygwinccompiler import Mingw32CCompiler
+
+        compiler = Mingw32CCompiler()
+        assert compiler.compiler_type == 'mingw32'
+
+    @pytest.mark.skipif(not is_mingw(), reason='not on mingw')
+    def test_set_executables(self, monkeypatch):
+        from distutils.cygwinccompiler import Mingw32CCompiler
+
+        monkeypatch.setenv('CC', 'cc')
+        monkeypatch.setenv('CXX', 'c++')
+
+        compiler = Mingw32CCompiler()
+
+        assert compiler.compiler == split_quoted('cc -O -Wall')
+        assert compiler.compiler_so == split_quoted('cc -mdll -O -Wall')
+        assert compiler.compiler_cxx == split_quoted('c++ -O -Wall')
+        assert compiler.linker_exe == split_quoted('cc')
+        assert compiler.linker_so == split_quoted('cc -shared')
+
+    @pytest.mark.skipif(not is_mingw(), reason='not on mingw')
+    def test_runtime_library_dir_option(self):
+        from distutils.cygwinccompiler import Mingw32CCompiler
+
+        compiler = Mingw32CCompiler()
+        with pytest.raises(DistutilsPlatformError):
+            compiler.runtime_library_dir_option('/usr/lib')
+
+    @pytest.mark.skipif(not is_mingw(), reason='not on mingw')
+    def test_cygwincc_error(self, monkeypatch):
+        import distutils.cygwinccompiler
+
+        monkeypatch.setattr(distutils.cygwinccompiler, 'is_cygwincc', lambda _: True)
+
+        with pytest.raises(CCompilerError):
+            distutils.cygwinccompiler.Mingw32CCompiler()