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check(1, Math.log(10, 10))

check(2, Math.log(100, 10))

check(Math.log(2.0 ** 64), Math.log(1 << 64))

assert_nothing_raised { assert_infinity(-Math.log(+0.0)) }

assert_nothing_raised { assert_infinity(-Math.log(-0.0)) }

assert_raise(Math::DomainError) { Math.log(-1.0) }

check(1, Math.log2(2))

check(2, Math.log2(4))

check(Math.log2(2.0 ** 64), Math.log2(1 << 64))

assert_nothing_raised { assert_infinity(-Math.log2(+0.0)) }

assert_nothing_raised { assert_infinity(-Math.log2(-0.0)) }

assert_raise(Math::DomainError) { Math.log2(-1.0) }

check(1, Math.log10(10))

check(2, Math.log10(100))

check(Math.log10(2.0 ** 64), Math.log10(1 << 64))

assert_nothing_raised { assert_infinity(-Math.log10(+0.0)) }

assert_nothing_raised { assert_infinity(-Math.log10(-0.0)) }

assert_raise(Math::DomainError) { Math.log10(-1.0) }

check(0, Math.sqrt(0))

check(1, Math.sqrt(1))

check(2, Math.sqrt(4))

assert_equal("0.0", Math.sqrt(-0.0).to_s) # insure it is +0.0, not -0.0

assert_raise(Math::DomainError) { Math.sqrt(-1.0) }

end

check(-2, Math.cbrt(-8))

check(3, Math.cbrt(27))

check(-0.1, Math.cbrt(-0.001))

end

def test_frexp