Recipe package system.

recipe_engine/third_party/setuptools/tests/test_markerlib.py

+import os
+import unittest
+from setuptools.tests.py26compat import skipIf
+
+try:
+    import ast
+except ImportError:
+    pass
+
+class TestMarkerlib(unittest.TestCase):
+
+    @skipIf('ast' not in globals(),
+        "ast not available (Python < 2.6?)")
+    def test_markers(self):
+        from _markerlib import interpret, default_environment, compile
+        
+        os_name = os.name
+        
+        self.assertTrue(interpret(""))
+        
+        self.assertTrue(interpret("os.name != 'buuuu'"))
+        self.assertTrue(interpret("os_name != 'buuuu'"))
+        self.assertTrue(interpret("python_version > '1.0'"))
+        self.assertTrue(interpret("python_version < '5.0'"))
+        self.assertTrue(interpret("python_version <= '5.0'"))
+        self.assertTrue(interpret("python_version >= '1.0'"))
+        self.assertTrue(interpret("'%s' in os.name" % os_name))
+        self.assertTrue(interpret("'%s' in os_name" % os_name))
+        self.assertTrue(interpret("'buuuu' not in os.name"))
+        
+        self.assertFalse(interpret("os.name == 'buuuu'"))
+        self.assertFalse(interpret("os_name == 'buuuu'"))
+        self.assertFalse(interpret("python_version < '1.0'"))
+        self.assertFalse(interpret("python_version > '5.0'"))
+        self.assertFalse(interpret("python_version >= '5.0'"))
+        self.assertFalse(interpret("python_version <= '1.0'"))
+        self.assertFalse(interpret("'%s' not in os.name" % os_name))
+        self.assertFalse(interpret("'buuuu' in os.name and python_version >= '5.0'"))    
+        self.assertFalse(interpret("'buuuu' in os_name and python_version >= '5.0'"))    
+        
+        environment = default_environment()
+        environment['extra'] = 'test'
+        self.assertTrue(interpret("extra == 'test'", environment))
+        self.assertFalse(interpret("extra == 'doc'", environment))
+        
+        def raises_nameError():
+            try:
+                interpret("python.version == '42'")
+            except NameError:
+                pass
+            else:
+                raise Exception("Expected NameError")
+        
+        raises_nameError()
+        
+        def raises_syntaxError():
+            try:
+                interpret("(x for x in (4,))")
+            except SyntaxError:
+                pass
+            else:
+                raise Exception("Expected SyntaxError")
+            
+        raises_syntaxError()
+        
+        statement = "python_version == '5'"
+        self.assertEqual(compile(statement).__doc__, statement)
+