tests/scanner: Add a test for ccompiler.pywip/fanc999/dumper-distutils

This adds a test for ccompiler.py so that we can test the compiler instance
creation via ccompiler.py (and therefore distutils), so that we can get the
correct compiler instances as we ask for them.

https://bugzilla.gnome.org/show_bug.cgi?id=728313

2 files changed, 81 insertions, 0 deletions

diff --git a/tests/scanner/Makefile.am b/tests/scanner/Makefile.am
index 13156c3b..2c016992 100644
--- a/tests/scanner/Makefile.am
+++ b/tests/scanner/Makefile.am
@@ -229,6 +229,7 @@ CHECKDOCS =
 endif
 
 PYTESTS = \
+	test_ccompiler.py \
 	test_sourcescanner.py \
 	test_transformer.py
 
diff --git a/tests/scanner/test_ccompiler.py b/tests/scanner/test_ccompiler.py
new file mode 100644
index 00000000..9e7a62a2
--- /dev/null
+++ b/tests/scanner/test_ccompiler.py
@@ -0,0 +1,80 @@
+import unittest
+import os
+import sys
+
+from distutils.cygwinccompiler import Mingw32CCompiler
+from distutils.unixccompiler import UnixCCompiler
+from distutils.msvccompiler import MSVCCompiler
+
+os.environ['GI_SCANNER_DISABLE_CACHE'] = '1'
+path = os.getenv('UNINSTALLED_INTROSPECTION_SRCDIR', None)
+assert path is not None
+sys.path.insert(0, path)
+
+from giscanner.ccompiler import CCompiler
+
+
+class TestCompiler(unittest.TestCase):
+
+    def check_windows_default_compiler(self, compiler):
+        if os.environ.get('MSYSTEM') == 'MINGW32':
+            return isinstance(compiler.compiler, Mingw32CCompiler)
+        else:
+            return isinstance(compiler.compiler, MSVCCompiler)
+
+    def check_default_compiler(self, compiler, osname=None):
+        # If osname is defined and is not 'nt', we always return the default
+        # compiler given for the running platform.  Otherwise, on Windows,
+        # we see for the presence of MSYSTEM == MINGW32 to see we create a
+        # Mingw32CCompiler or MSVCCompiler instance
+        if os.name == 'nt':
+            if osname is None or osname == os.name:
+                return self.check_windows_default_compiler(compiler)
+            else:
+                return isinstance(compiler.compiler, MSVCCompiler)
+        else:
+            return (isinstance(compiler.compiler, UnixCCompiler) and
+                    not isinstance(compiler.compiler, Mingw32CCompiler))
+
+    def test_compiler_creation(self):
+        osname = 'nt'
+        # Test distutils compiler detection when forcing osname = 'nt'
+        compiler = CCompiler(osname=osname, environ={'MSYSTEM': 'MINGW32'})
+        self.assertTrue(isinstance(compiler.compiler, Mingw32CCompiler))
+
+        compiler = CCompiler(osname=osname, compiler_name='mingw32')
+        self.assertTrue(isinstance(compiler.compiler, Mingw32CCompiler))
+
+        compiler = CCompiler(osname=osname, compiler_name='msvc')
+        self.assertTrue(isinstance(compiler.compiler, MSVCCompiler))
+
+        with self.assertRaises(SystemExit):
+            CCompiler(osname=osname, compiler_name='bad_compiler_name')
+
+        if os.name == 'nt':
+            compiler = CCompiler(osname=osname)
+            self.assertTrue(self.check_windows_default_compiler(compiler))
+        else:
+            with self.assertRaises(SystemExit):
+                CCompiler(osname=osname, compiler_name='bad_compiler_name')
+
+        # Test distutils compiler detection when forcing osname != 'nt'
+        osname = 'posix'
+        compiler = CCompiler(osname=osname, environ={'MSYSTEM': 'MINGW32'})
+        self.assertTrue(self.check_default_compiler(compiler, osname))
+
+        compiler = CCompiler(osname=osname, compiler_name='mingw32')
+        self.assertTrue(self.check_default_compiler(compiler, osname))
+
+        compiler = CCompiler(osname=osname, compiler_name='msvc')
+        self.assertTrue(self.check_default_compiler(compiler, osname))
+
+        compiler = CCompiler(osname=osname, compiler_name='blah')
+        self.assertTrue(self.check_default_compiler(compiler, osname))
+
+        # Test default distutils compiler with ccompiler.py
+        compiler = CCompiler()
+        self.assertTrue(self.check_default_compiler(compiler))
+
+if __name__ == '__main__':
+    unittest.main()