Maciej Fijalkowski avatar Maciej Fijalkowski committed 9eb6236

fix test_dis.py

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Files changed (1)

lib-python/modified-2.7/test/test_dis.py

+# Minimal tests for dis module
+
+from test.test_support import run_unittest
+import unittest
+import sys
+import dis
+import StringIO
+
+
+def _f(a):
+    print a
+    return 1
+
+dis_f = """\
+ %-4d         0 LOAD_FAST                0 (a)
+              3 PRINT_ITEM
+              4 PRINT_NEWLINE
+
+ %-4d         5 LOAD_CONST               1 (1)
+              8 RETURN_VALUE
+"""%(_f.func_code.co_firstlineno + 1,
+     _f.func_code.co_firstlineno + 2)
+
+
+def bug708901():
+    for res in range(1,
+                     10):
+        pass
+
+dis_bug708901 = """\
+ %-4d         0 SETUP_LOOP              23 (to 26)
+              3 LOAD_GLOBAL              0 (range)
+              6 LOAD_CONST               1 (1)
+
+ %-4d         9 LOAD_CONST               2 (10)
+             12 CALL_FUNCTION            2
+             15 GET_ITER
+        >>   16 FOR_ITER                 6 (to 25)
+             19 STORE_FAST               0 (res)
+
+ %-4d        22 JUMP_ABSOLUTE           16
+        >>   25 POP_BLOCK
+        >>   26 LOAD_CONST               0 (None)
+             29 RETURN_VALUE
+"""%(bug708901.func_code.co_firstlineno + 1,
+     bug708901.func_code.co_firstlineno + 2,
+     bug708901.func_code.co_firstlineno + 3)
+
+
+def bug1333982(x=[]):
+    assert 0, ([s for s in x] +
+              1)
+    pass
+
+dis_bug1333982 = """\
+ %-4d         0 LOAD_CONST               1 (0)
+              3 POP_JUMP_IF_TRUE        38
+              6 LOAD_GLOBAL              0 (AssertionError)
+              9 LOAD_FAST                0 (x)
+             12 BUILD_LIST_FROM_ARG      0
+             15 GET_ITER
+        >>   16 FOR_ITER                12 (to 31)
+             19 STORE_FAST               1 (s)
+             22 LOAD_FAST                1 (s)
+             25 LIST_APPEND              2
+             28 JUMP_ABSOLUTE           16
+
+ %-4d   >>   31 LOAD_CONST               2 (1)
+             34 BINARY_ADD
+             35 RAISE_VARARGS            2
+
+ %-4d   >>   38 LOAD_CONST               0 (None)
+             41 RETURN_VALUE
+"""%(bug1333982.func_code.co_firstlineno + 1,
+     bug1333982.func_code.co_firstlineno + 2,
+     bug1333982.func_code.co_firstlineno + 3)
+
+_BIG_LINENO_FORMAT = """\
+%3d           0 LOAD_GLOBAL              0 (spam)
+              3 POP_TOP
+              4 LOAD_CONST               0 (None)
+              7 RETURN_VALUE
+"""
+
+class DisTests(unittest.TestCase):
+    def do_disassembly_test(self, func, expected):
+        s = StringIO.StringIO()
+        save_stdout = sys.stdout
+        sys.stdout = s
+        dis.dis(func)
+        sys.stdout = save_stdout
+        got = s.getvalue()
+        # Trim trailing blanks (if any).
+        lines = got.split('\n')
+        lines = [line.rstrip() for line in lines]
+        expected = expected.split("\n")
+        import difflib
+        if expected != lines:
+            self.fail(
+                "events did not match expectation:\n" +
+                "\n".join(difflib.ndiff(expected,
+                                        lines)))
+
+    def test_opmap(self):
+        self.assertEqual(dis.opmap["STOP_CODE"], 0)
+        self.assertIn(dis.opmap["LOAD_CONST"], dis.hasconst)
+        self.assertIn(dis.opmap["STORE_NAME"], dis.hasname)
+
+    def test_opname(self):
+        self.assertEqual(dis.opname[dis.opmap["LOAD_FAST"]], "LOAD_FAST")
+
+    def test_boundaries(self):
+        self.assertEqual(dis.opmap["EXTENDED_ARG"], dis.EXTENDED_ARG)
+        self.assertEqual(dis.opmap["STORE_NAME"], dis.HAVE_ARGUMENT)
+
+    def test_dis(self):
+        self.do_disassembly_test(_f, dis_f)
+
+    def test_bug_708901(self):
+        self.do_disassembly_test(bug708901, dis_bug708901)
+
+    def test_bug_1333982(self):
+        # This one is checking bytecodes generated for an `assert` statement,
+        # so fails if the tests are run with -O.  Skip this test then.
+        if __debug__:
+            self.do_disassembly_test(bug1333982, dis_bug1333982)
+
+    def test_big_linenos(self):
+        def func(count):
+            namespace = {}
+            func = "def foo():\n " + "".join(["\n "] * count + ["spam\n"])
+            exec func in namespace
+            return namespace['foo']
+
+        # Test all small ranges
+        for i in xrange(1, 300):
+            expected = _BIG_LINENO_FORMAT % (i + 2)
+            self.do_disassembly_test(func(i), expected)
+
+        # Test some larger ranges too
+        for i in xrange(300, 5000, 10):
+            expected = _BIG_LINENO_FORMAT % (i + 2)
+            self.do_disassembly_test(func(i), expected)
+
+def test_main():
+    run_unittest(DisTests)
+
+
+if __name__ == "__main__":
+    test_main()
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