Port test_complex.py to unittest.

Move the constructor tests from test_builtin to test_complex.

Add a bunch of tests (code coverage is a 94%).

From SF patch #736962.

Lib/test/test_builtin.py

@@ -201,62 +201,6 @@ class BuiltinTest(unittest.TestCase):
         if have_unicode:
             compile(unicode('print u"\xc3\xa5"\n', 'utf8'), '', 'exec')
 
-    def test_complex(self):
-        class OS:
-            def __complex__(self): return 1+10j
-        class NS(object):
-            def __complex__(self): return 1+10j
-        self.assertEqual(complex(OS()), 1+10j)
-        self.assertEqual(complex(NS()), 1+10j)
-        self.assertEqual(complex("1+10j"), 1+10j)
-        self.assertEqual(complex(10), 10+0j)
-        self.assertEqual(complex(10.0), 10+0j)
-        self.assertEqual(complex(10L), 10+0j)
-        self.assertEqual(complex(10+0j), 10+0j)
-        self.assertEqual(complex(1,10), 1+10j)
-        self.assertEqual(complex(1,10L), 1+10j)
-        self.assertEqual(complex(1,10.0), 1+10j)
-        self.assertEqual(complex(1L,10), 1+10j)
-        self.assertEqual(complex(1L,10L), 1+10j)
-        self.assertEqual(complex(1L,10.0), 1+10j)
-        self.assertEqual(complex(1.0,10), 1+10j)
-        self.assertEqual(complex(1.0,10L), 1+10j)
-        self.assertEqual(complex(1.0,10.0), 1+10j)
-        self.assertEqual(complex(3.14+0j), 3.14+0j)
-        self.assertEqual(complex(3.14), 3.14+0j)
-        self.assertEqual(complex(314), 314.0+0j)
-        self.assertEqual(complex(314L), 314.0+0j)
-        self.assertEqual(complex(3.14+0j, 0j), 3.14+0j)
-        self.assertEqual(complex(3.14, 0.0), 3.14+0j)
-        self.assertEqual(complex(314, 0), 314.0+0j)
-        self.assertEqual(complex(314L, 0L), 314.0+0j)
-        self.assertEqual(complex(0j, 3.14j), -3.14+0j)
-        self.assertEqual(complex(0.0, 3.14j), -3.14+0j)
-        self.assertEqual(complex(0j, 3.14), 3.14j)
-        self.assertEqual(complex(0.0, 3.14), 3.14j)
-        self.assertEqual(complex("1"), 1+0j)
-        self.assertEqual(complex("1j"), 1j)
-
-        c = 3.14 + 1j
-        self.assert_(complex(c) is c)
-        del c
-
-        self.assertRaises(TypeError, complex, "1", "1")
-        self.assertRaises(TypeError, complex, 1, "1")
-
-        self.assertEqual(complex("  3.14+J  "), 3.14+1j)
-        if have_unicode:
-            self.assertEqual(complex(unicode("  3.14+J  ")), 3.14+1j)
-
-        # SF bug 543840:  complex(string) accepts strings with \0
-        # Fixed in 2.3.
-        self.assertRaises(ValueError, complex, '1+1j\0j')
-
-        class Z:
-            def __complex__(self): return 3.14j
-        z = Z()
-        self.assertEqual(complex(z), 3.14j)
-
     def test_delattr(self):
         import sys
         sys.spam = 1