Method test_specific_values

Lib/test/test_cmath.py:280–364

(self)

    @requires_IEEE_754
    def test_specific_values(self):
        # Some tests need to be skipped on ancient OS X versions.
        # See issue #27953.
        SKIP_ON_TIGER = {'tan0064'}

        osx_version = None
        if sys.platform == 'darwin':
            version_txt = platform.mac_ver()[0]
            try:
                osx_version = tuple(map(int, version_txt.split('.')))
            except ValueError:
                pass

        def rect_complex(z):
            """Wrapped version of rect that accepts a complex number instead of
            two float arguments."""
            return cmath.rect(z.real, z.imag)

        def polar_complex(z):
            """Wrapped version of polar that returns a complex number instead of
            two floats."""
            return complex(*polar(z))

        for id, fn, ar, ai, er, ei, flags in parse_testfile(test_file):
            arg = complex(ar, ai)
            expected = complex(er, ei)

            # Skip certain tests on OS X 10.4.
            if osx_version is not None and osx_version < (10, 5):
                if id in SKIP_ON_TIGER:
                    continue

            if fn == 'rect':
                function = rect_complex
            elif fn == 'polar':
                function = polar_complex
            else:
                function = getattr(cmath, fn)
            if 'divide-by-zero' in flags or 'invalid' in flags:
                try:
                    actual = function(arg)
                except ValueError:
                    continue
                else:
                    self.fail('ValueError not raised in test '
                          '{}: {}(complex({!r}, {!r}))'.format(id, fn, ar, ai))

            if 'overflow' in flags:
                try:
                    actual = function(arg)
                except OverflowError:
                    continue
                else:
                    self.fail('OverflowError not raised in test '
                          '{}: {}(complex({!r}, {!r}))'.format(id, fn, ar, ai))

            actual = function(arg)