Index: Lib/test/test_inspect.py
===================================================================
--- Lib/test/test_inspect.py	(revision 71503)
+++ Lib/test/test_inspect.py	(working copy)
@@ -3,8 +3,9 @@
 import unittest
 import inspect
 import datetime
+import os.path
 
-from test.test_support import TESTFN, run_unittest
+from test.test_support import TESTFN, run_unittest, unlink
 
 from test import inspect_fodder as mod
 from test import inspect_fodder2 as mod2
@@ -32,6 +33,14 @@
 
 git = mod.StupidGit()
 
+SOURCE_1 = '''def foo():
+    print("Bla")
+'''
+
+SOURCE_2 = '''def foo():
+    print("Oh no!")
+'''
+
 class IsTestBase(unittest.TestCase):
     predicates = set([inspect.isbuiltin, inspect.isclass, inspect.iscode,
                       inspect.isframe, inspect.isfunction, inspect.ismethod,
@@ -514,9 +523,49 @@
         self.assert_(('m1', 'method', D) in attrs, 'missing plain method')
         self.assert_(('datablob', 'data', A) in attrs, 'missing data')
 
+class TestReload(unittest.TestCase):
+    def test_getsource_reload(self):
+        # Issue #1218234
+        getsource = inspect.getsource
+        try:
+            # Create a source file and import it
+            testdir = os.path.dirname(mod.__file__)
+            source_name = os.path.join(testdir, 'source_reload_test.py')
+            source = open(source_name, 'w')
+            source.write(SOURCE_1)
+            source.close()
+            import source_reload_test
+
+            # Keep a copy of the old contents
+            source_list = []
+            source = open(source_name)
+            inspected_source = getsource(source_reload_test).splitlines(True)
+            for read, inspected in zip(source, inspected_source):
+                self.assertEquals(read, inspected)
+                source_list.append(read)
+            source.close()
+
+            source = open(source_name, 'w')
+            source.write(SOURCE_2)
+            source.close()
+
+            # Test that we get the new file contents
+            source = open(source_name)
+            inspected_source = getsource(source_reload_test).splitlines(True)
+            for read, inspected in zip(source, inspected_source):
+                self.assertEquals(read, inspected)
+            source.close()
+
+        finally:
+            try:
+                source.close()
+            finally:
+                unlink(source_name)
+
+
 def test_main():
     run_unittest(TestDecorators, TestRetrievingSourceCode, TestOneliners,
-                 TestBuggyCases,
+                 TestBuggyCases, TestReload,
                  TestInterpreterStack, TestClassesAndFunctions, TestPredicates)
 
 if __name__ == "__main__":