Fix an incompatibility between the -i and -m command line switches as reported on python-dev by PJE - runpy.run_module now leaves any changes it makes to the sys module intact after the function terminates

1 files changed, 29 insertions, 21 deletions

diff --git a/Lib/test/test_runpy.py b/Lib/test/test_runpy.py
index 31f4f85..3a5a709 100644
--- a/Lib/test/test_runpy.py
+++ b/Lib/test/test_runpy.py
@@ -26,8 +26,7 @@ class RunModuleCodeTest(unittest.TestCase):
         "   module_in_sys_modules = globals() is sys.modules[__name__].__dict__\n"
         "# Check nested operation\n"
         "import runpy\n"
-        "nested = runpy._run_module_code('x=1\\n', mod_name='<run>',\n"
-        "                                          alter_sys=True)\n"
+        "nested = runpy._run_module_code('x=1\\n', mod_name='<run>')\n"
     )
 
 
@@ -38,35 +37,44 @@ class RunModuleCodeTest(unittest.TestCase):
         loader = "Now you're just being silly"
         d1 = dict(initial=initial)
         saved_argv0 = sys.argv[0]
-        d2 = _run_module_code(self.test_source,
-                              d1,
-                              name,
-                              file,
-                              loader,
-                              True)
-        self.failUnless("result" not in d1)
-        self.failUnless(d2["initial"] is initial)
-        self.failUnless(d2["result"] == self.expected_result)
-        self.failUnless(d2["nested"]["x"] == 1)
-        self.failUnless(d2["__name__"] is name)
-        self.failUnless(d2["run_name_in_sys_modules"])
-        self.failUnless(d2["module_in_sys_modules"])
-        self.failUnless(d2["__file__"] is file)
-        self.failUnless(d2["run_argv0"] is file)
-        self.failUnless(d2["__loader__"] is loader)
-        self.failUnless(sys.argv[0] is saved_argv0)
-        self.failUnless(name not in sys.modules)
+        try:
+            d2 = _run_module_code(self.test_source,
+                                d1,
+                                name,
+                                file,
+                                loader,
+                                alter_sys=True)
+            self.failUnless("result" not in d1)
+            self.failUnless(d2["initial"] is initial)
+            self.failUnless(d2["result"] == self.expected_result)
+            self.failUnless(d2["nested"]["x"] == 1)
+            self.failUnless(d2["nested"]["__name__"] == "<run>")
+            self.failUnless(d2["__name__"] is name)
+            self.failUnless(d2["__file__"] is file)
+            self.failUnless(d2["__loader__"] is loader)
+            self.failUnless(d2["run_argv0"] is file)
+            self.failUnless(d2["run_name_in_sys_modules"])
+            self.failUnless(d2["module_in_sys_modules"])
+            self.failUnless(sys.argv[0] is not saved_argv0)
+            self.failUnless(name in sys.modules)
+        finally:
+            sys.argv[0] = saved_argv0
+            if name in sys.modules:
+                del sys.modules[name]
 
     def test_run_module_code_defaults(self):
         saved_argv0 = sys.argv[0]
         d = _run_module_code(self.test_source)
         self.failUnless(d["result"] == self.expected_result)
+        self.failUnless(d["nested"]["x"] == 1)
+        self.failUnless(d["nested"]["__name__"] == "<run>")
         self.failUnless(d["__name__"] is None)
         self.failUnless(d["__file__"] is None)
         self.failUnless(d["__loader__"] is None)
         self.failUnless(d["run_argv0"] is saved_argv0)
-        self.failUnless("run_name" not in d)
+        self.failUnless(not d["run_name_in_sys_modules"])
         self.failUnless(sys.argv[0] is saved_argv0)
+        self.failUnless(None not in sys.modules)
 
 class RunModuleTest(unittest.TestCase):