Add some tests of the utility routines

trunk/src/ZODB/tests/testUtils.py

+"""Test the routines to convert between long and 64-bit strings"""
+
+import random
+import unittest
+
+NUM = 100
+
+from ZODB.utils import U64, p64, u64
+
+class TestUtils(unittest.TestCase):
+
+    small = [random.randrange(1, 1L<<32, int=long)
+             for i in range(NUM)]
+    large = [random.randrange(1L<<32, 1L<<64, int=long)
+             for i in range(NUM)]
+    all = small + large
+    
+    def checkLongToStringToLong(self):
+        for num in self.all:
+            s = p64(num)
+            n = U64(s)
+            self.assertEquals(num, n, "U64() failed")
+            n2 = u64(s)
+            self.assertEquals(num, n2, "u64() failed")
+
+    def checkKnownConstants(self):
+        self.assertEquals("\000\000\000\000\000\000\000\001", p64(1))
+        self.assertEquals("\000\000\000\001\000\000\000\000", p64(1L<<32))
+        self.assertEquals(u64("\000\000\000\000\000\000\000\001"), 1)
+        self.assertEquals(U64("\000\000\000\000\000\000\000\001"), 1)
+        self.assertEquals(u64("\000\000\000\001\000\000\000\000"), 1L<<32)
+        self.assertEquals(U64("\000\000\000\001\000\000\000\000"), 1L<<32)
+
+def test_suite():
+    return unittest.makeSuite(TestUtils, 'check')
+            
+if __name__ == "__main__":
+    loader = unittest.TestLoader()
+    loader.testMethodPrefix = "check"
+    unittest.main(testLoader=loader)
+