Method test_log_values

numpy/core/tests/test_umath.py:1438–1485

(self)

    @pytest.mark.skipif(IS_WASM, reason="fp errors don't work in wasm")
    def test_log_values(self):
        with np.errstate(all='ignore'):
            x = [np.nan, np.nan, np.inf, np.nan, -np.inf, np.nan]
            y = [np.nan, -np.nan, np.inf, -np.inf, 0.0, -1.0]
            y1p = [np.nan, -np.nan, np.inf, -np.inf, -1.0, -2.0]
            for dt in ['e', 'f', 'd', 'g']:
                xf = np.array(x, dtype=dt)
                yf = np.array(y, dtype=dt)
                yf1p = np.array(y1p, dtype=dt)
                assert_equal(np.log(yf), xf)
                assert_equal(np.log2(yf), xf)
                assert_equal(np.log10(yf), xf)
                assert_equal(np.log1p(yf1p), xf)

        with np.errstate(divide='raise'):
            for dt in ['e', 'f', 'd']:
                assert_raises(FloatingPointError, np.log,
                              np.array(0.0, dtype=dt))
                assert_raises(FloatingPointError, np.log2,
                              np.array(0.0, dtype=dt))
                assert_raises(FloatingPointError, np.log10,
                              np.array(0.0, dtype=dt))
                assert_raises(FloatingPointError, np.log1p,
                              np.array(-1.0, dtype=dt))

        with np.errstate(invalid='raise'):
            for dt in ['e', 'f', 'd']:
                assert_raises(FloatingPointError, np.log,
                              np.array(-np.inf, dtype=dt))
                assert_raises(FloatingPointError, np.log,
                              np.array(-1.0, dtype=dt))
                assert_raises(FloatingPointError, np.log2,
                              np.array(-np.inf, dtype=dt))
                assert_raises(FloatingPointError, np.log2,
                              np.array(-1.0, dtype=dt))
                assert_raises(FloatingPointError, np.log10,
                              np.array(-np.inf, dtype=dt))
                assert_raises(FloatingPointError, np.log10,
                              np.array(-1.0, dtype=dt))
                assert_raises(FloatingPointError, np.log1p,
                              np.array(-np.inf, dtype=dt))
                assert_raises(FloatingPointError, np.log1p,
                              np.array(-2.0, dtype=dt))

        # See https://github.com/numpy/numpy/issues/18005
        with assert_no_warnings():
            a = np.array(1e9, dtype='float32')
            np.log(a)

    @pytest.mark.skipif(IS_WASM, reason="fp errors don't work in wasm")
    @pytest.mark.parametrize('dtype', ['e', 'f', 'd', 'g'])