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Diffstat (limited to 'test/bigdecimal/test_bigmath.rb')
| -rw-r--r-- | test/bigdecimal/test_bigmath.rb | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/test/bigdecimal/test_bigmath.rb b/test/bigdecimal/test_bigmath.rb index 2ccdb510f9..c553353d61 100644 --- a/test/bigdecimal/test_bigmath.rb +++ b/test/bigdecimal/test_bigmath.rb @@ -60,4 +60,11 @@ class TestBigMath < Test::Unit::TestCase assert_equal(BigDecimal("0.823840753418636291769355073102514088959345624027952954058347023122539489"), atan(BigDecimal("1.08"), 72).round(72), '[ruby-dev:41257]') end + + def test_log + assert_equal(0, BigMath.log(BigDecimal("1.0"), 10)) + assert_in_epsilon(Math.log(10)*1000, BigMath.log(BigDecimal("1e1000"), 10)) + assert_raise(Math::DomainError) {BigMath.log(BigDecimal("0"), 10)} + assert_raise(Math::DomainError) {BigMath.log(BigDecimal("-1"), 10)} + end end |