more extension marshal tests and conversion to unittest - was surprised to

see how much of the file was not covered by the build process

Lib/test/test_marshal.py

-from test.test_support import TestFailed
+#!/usr/bin/env python
+# -*- coding: iso-8859-1 -*-
+
+from test import test_support
 import marshal
 import sys
+import unittest
+import os
 
-# XXX Much more needed here.
+class IntTestCase(unittest.TestCase):
+    def test_ints(self):
+        # Test the full range of Python ints.
+        n = sys.maxint
+        while n:
+            for expected in (-n, n):
+                s = marshal.dumps(expected)
+                got = marshal.loads(s)
+                self.assertEqual(expected, got)
+                marshal.dump(expected, file(test_support.TESTFN, "wb"))
+                got = marshal.load(file(test_support.TESTFN, "rb"))
+                self.assertEqual(expected, got)
+            n = n >> 1
+        os.unlink(test_support.TESTFN)
 
-# Test the full range of Python ints.
-n = sys.maxint
-while n:
-    for expected in (-n, n):
-        s = marshal.dumps(expected)
-        got = marshal.loads(s)
-        if expected != got:
-            raise TestFailed("for int %d, marshal string is %r, loaded "
-                             "back as %d" % (expected, s, got))
-    n = n >> 1
-
-# Simulate int marshaling on a 64-bit box.  This is most interesting if
-# we're running the test on a 32-bit box, of course.
-
-def to_little_endian_string(value, nbytes):
-    bytes = []
-    for i in range(nbytes):
-        bytes.append(chr(value & 0xff))
-        value >>= 8
-    return ''.join(bytes)
-
-maxint64 = (1L << 63) - 1
-minint64 = -maxint64-1
-
-for base in maxint64, minint64, -maxint64, -(minint64 >> 1):
-    while base:
-        s = 'I' + to_little_endian_string(base, 8)
+    def test_int64(self):
+        # Simulate int marshaling on a 64-bit box.  This is most interesting if
+        # we're running the test on a 32-bit box, of course.
+
+        def to_little_endian_string(value, nbytes):
+            bytes = []
+            for i in range(nbytes):
+                bytes.append(chr(value & 0xff))
+                value >>= 8
+            return ''.join(bytes)
+
+        maxint64 = (1L << 63) - 1
+        minint64 = -maxint64-1
+
+        for base in maxint64, minint64, -maxint64, -(minint64 >> 1):
+            while base:
+                s = 'I' + to_little_endian_string(base, 8)
+                got = marshal.loads(s)
+                self.assertEqual(base, got)
+                if base == -1:  # a fixed-point for shifting right 1
+                    base = 0
+                else:
+                    base >>= 1
+
+    def test_bool(self):
+        for b in (True, False):
+            new = marshal.loads(marshal.dumps(b))
+            self.assertEqual(b, new)
+            self.assertEqual(type(b), type(new))
+            marshal.dump(b, file(test_support.TESTFN, "wb"))
+            new = marshal.load(file(test_support.TESTFN, "rb"))
+            self.assertEqual(b, new)
+            self.assertEqual(type(b), type(new))
+            
+class FloatTestCase(unittest.TestCase):
+    def test_floats(self):
+        # Test a few floats
+        small = 1e-25
+        n = sys.maxint * 3.7e250
+        while n > small:
+            for expected in (-n, n):
+                f = float(expected)
+                s = marshal.dumps(f)
+                got = marshal.loads(s)
+                self.assertEqual(f, got)
+                marshal.dump(f, file(test_support.TESTFN, "wb"))
+                got = marshal.load(file(test_support.TESTFN, "rb"))
+                self.assertEqual(f, got)
+            n /= 123.4567
+
+        f = 0.0
+        s = marshal.dumps(f)
         got = marshal.loads(s)
-        if base != got:
-            raise TestFailed("for int %d, simulated marshal string is %r, "
-                             "loaded back as %d" % (base, s, got))
-        if base == -1:  # a fixed-point for shifting right 1
-            base = 0
-        else:
-            base >>= 1
-
-# Simple-minded check for SF 588452: Debug build crashes
-marshal.dumps([128] * 1000)
+        self.assertEqual(f, got)
+
+        n = sys.maxint * 3.7e-250
+        while n < small:
+            for expected in (-n, n):
+                f = float(expected)
+                s = marshal.dumps(f)
+                got = marshal.loads(s)
+                self.assertEqual(f, got)
+                marshal.dump(f, file(test_support.TESTFN, "wb"))
+                got = marshal.load(file(test_support.TESTFN, "rb"))
+                self.assertEqual(f, got)
+            n *= 123.4567
+        os.unlink(test_support.TESTFN)
+
+class StringTestCase(unittest.TestCase):
+    def test_unicode(self):
+        for s in [u"", u"Andr Previn", u"abc", u" "*10000]:
+            new = marshal.loads(marshal.dumps(s))
+            self.assertEqual(s, new)
+            self.assertEqual(type(s), type(new))
+            marshal.dump(s, file(test_support.TESTFN, "wb"))
+            marshal.load(file(test_support.TESTFN, "rb"))
+            self.assertEqual(s, new)
+            self.assertEqual(type(s), type(new))
+        os.unlink(test_support.TESTFN)
+
+    def test_string(self):
+        for s in ["", "Andr Previn", "abc", " "*10000]:
+            new = marshal.loads(marshal.dumps(s))
+            self.assertEqual(s, new)
+            self.assertEqual(type(s), type(new))
+            marshal.dump(s, file(test_support.TESTFN, "wb"))
+            marshal.load(file(test_support.TESTFN, "rb"))
+            self.assertEqual(s, new)
+            self.assertEqual(type(s), type(new))
+        os.unlink(test_support.TESTFN)
+
+    def test_buffer(self):
+        for s in ["", "Andr Previn", "abc", " "*10000]:
+            b = buffer(s)
+            new = marshal.loads(marshal.dumps(b))
+            self.assertEqual(s, new)
+            marshal.dump(b, file(test_support.TESTFN, "wb"))
+            marshal.load(file(test_support.TESTFN, "rb"))
+            self.assertEqual(s, new)
+        os.unlink(test_support.TESTFN)
+            
+class ExceptionTestCase(unittest.TestCase):
+    def test_exceptions(self):
+        new = marshal.loads(marshal.dumps(StopIteration))
+        self.assertEqual(StopIteration, new)
+
+class CodeTestCase(unittest.TestCase):
+    def test_code(self):
+        co = ExceptionTestCase.test_exceptions.func_code
+        new = marshal.loads(marshal.dumps(co))
+        self.assertEqual(co, new)
+
+class ContainerTestCase(unittest.TestCase):
+    d = {'astring': 'foo@bar.baz.spam',
+         'afloat': 7283.43,
+         'anint': 2**20,
+         'ashortlong': 2L,
+         'alist': ['.zyx.41'],
+         'atuple': ('.zyx.41',)*10,
+         'aboolean': False,
+         'aunicode': u"Andr Previn"
+         }
+    def test_dict(self):
+        new = marshal.loads(marshal.dumps(self.d))
+        self.assertEqual(self.d, new)
+        marshal.dump(self.d, file(test_support.TESTFN, "wb"))
+        marshal.load(file(test_support.TESTFN, "rb"))
+        self.assertEqual(self.d, new)
+        os.unlink(test_support.TESTFN)
+        
+    def test_list(self):
+        lst = self.d.items()
+        new = marshal.loads(marshal.dumps(lst))
+        self.assertEqual(lst, new)
+        marshal.dump(lst, file(test_support.TESTFN, "wb"))
+        marshal.load(file(test_support.TESTFN, "rb"))
+        self.assertEqual(lst, new)
+        os.unlink(test_support.TESTFN)
+
+    def test_tuple(self):
+        t = tuple(self.d.keys())
+        new = marshal.loads(marshal.dumps(t))
+        self.assertEqual(t, new)
+        marshal.dump(t, file(test_support.TESTFN, "wb"))
+        marshal.load(file(test_support.TESTFN, "rb"))
+        self.assertEqual(t, new)
+        os.unlink(test_support.TESTFN)
+        
+class BugsTestCase(unittest.TestCase):
+    def test_bug_5888452(self):
+        # Simple-minded check for SF 588452: Debug build crashes
+        marshal.dumps([128] * 1000)
+
+def test_main():
+    test_support.run_unittest(IntTestCase,
+                              FloatTestCase,
+                              StringTestCase,
+                              CodeTestCase,
+                              ContainerTestCase,
+                              ExceptionTestCase,
+                              BugsTestCase)
+
+if __name__ == "__main__":
+    test_main()