Method test_builtin_tuple

Lib/test/test_iter.py:498–528

(self)

    # Test tuples()'s use of iterators.
    def test_builtin_tuple(self):
        self.assertEqual(tuple(SequenceClass(5)), (0, 1, 2, 3, 4))
        self.assertEqual(tuple(SequenceClass(0)), ())
        self.assertEqual(tuple([]), ())
        self.assertEqual(tuple(()), ())
        self.assertEqual(tuple("abc"), ("a", "b", "c"))

        d = {"one": 1, "two": 2, "three": 3}
        self.assertEqual(tuple(d), tuple(d.keys()))

        self.assertRaises(TypeError, tuple, list)
        self.assertRaises(TypeError, tuple, 42)

        f = open(TESTFN, "w", encoding="utf-8")
        try:
            for i in range(5):
                f.write("%d\n" % i)
        finally:
            f.close()
        f = open(TESTFN, "r", encoding="utf-8")
        try:
            self.assertEqual(tuple(f), ("0\n", "1\n", "2\n", "3\n", "4\n"))
            f.seek(0, 0)
            self.assertEqual(tuple(f),
                             ("0\n", "1\n", "2\n", "3\n", "4\n"))
        finally:
            f.close()
            try:
                unlink(TESTFN)
            except OSError:
                pass

    # Test filter()'s use of iterators.
    def test_builtin_filter(self):