Method test_constructor

Lib/test/test_complex.py:458–630

(self)

        self.assertEqual(complex(5.3, 9.8).conjugate(), 5.3-9.8j)

    def test_constructor(self):
        def check(z, x, y):
            self.assertIs(type(z), complex)
            self.assertFloatsAreIdentical(z.real, x)
            self.assertFloatsAreIdentical(z.imag, y)

        check(complex(),  0.0, 0.0)
        check(complex(10), 10.0, 0.0)
        check(complex(4.25), 4.25, 0.0)
        check(complex(4.25+0j), 4.25, 0.0)
        check(complex(4.25+0.5j), 4.25, 0.5)
        check(complex(ComplexSubclass(4.25+0.5j)), 4.25, 0.5)
        check(complex(WithComplex(4.25+0.5j)), 4.25, 0.5)

        check(complex(1, 10), 1.0, 10.0)
        check(complex(1, 10.0), 1.0, 10.0)
        check(complex(1, 4.25), 1.0, 4.25)
        check(complex(1.0, 10), 1.0, 10.0)
        check(complex(4.25, 10), 4.25, 10.0)
        check(complex(1.0, 10.0), 1.0, 10.0)
        check(complex(4.25, 0.5), 4.25, 0.5)

        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not complex"):
            check(complex(4.25+0j, 0), 4.25, 0.0)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not .*ComplexSubclass"):
            check(complex(ComplexSubclass(4.25+0j), 0), 4.25, 0.0)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not .*WithComplex"):
            check(complex(WithComplex(4.25+0j), 0), 4.25, 0.0)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not complex"):
            check(complex(4.25j, 0), 0.0, 4.25)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not complex"):
            check(complex(0j, 4.25), 0.0, 4.25)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'imag' must be a real number, not complex"):
            check(complex(0, 4.25+0j), 0.0, 4.25)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'imag' must be a real number, not .*ComplexSubclass"):
            check(complex(0, ComplexSubclass(4.25+0j)), 0.0, 4.25)
        with self.assertRaisesRegex(TypeError,
                "argument 'imag' must be a real number, not .*WithComplex"):
            complex(0, WithComplex(4.25+0j))
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'imag' must be a real number, not complex"):
            check(complex(0.0, 4.25j), -4.25, 0.0)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not complex"):
            check(complex(4.25+0j, 0j), 4.25, 0.0)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not complex"):
            check(complex(4.25j, 0j), 0.0, 4.25)
        with self.assertWarnsRegex(DeprecationWarning,
                "argument 'real' must be a real number, not complex"):
            check(complex(0j, 4.25+0j), 0.0, 4.25)