diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/ruby/test_math.rb | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/test/ruby/test_math.rb b/test/ruby/test_math.rb index a676bb5cd9..e134600cc4 100644 --- a/test/ruby/test_math.rb +++ b/test/ruby/test_math.rb @@ -321,11 +321,21 @@ class TestMath < Test::Unit::TestCase assert_float_and_int([Math.log(6), 1], Math.lgamma(4)) assert_raise_with_message(Math::DomainError, /\blgamma\b/) { Math.lgamma(-Float::INFINITY) } + + x, sign = Math.lgamma(+0.0) + mesg = "Math.lgamma(+0.0) should be [INF, +1]" + assert_infinity(x, mesg) + assert_equal(+1, sign, mesg) + x, sign = Math.lgamma(-0.0) mesg = "Math.lgamma(-0.0) should be [INF, -1]" assert_infinity(x, mesg) assert_equal(-1, sign, mesg) - x, sign = Math.lgamma(Float::NAN) + + x, = Math.lgamma(-1) + assert_infinity(x, "Math.lgamma(-1) should be +INF") + + x, = Math.lgamma(Float::NAN) assert_nan(x) end |