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Diffstat (limited to 'test/bigdecimal/test_bigmath.rb')
| -rw-r--r-- | test/bigdecimal/test_bigmath.rb | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/bigdecimal/test_bigmath.rb b/test/bigdecimal/test_bigmath.rb index 453c47ec6b..ae3cb9d5f9 100644 --- a/test/bigdecimal/test_bigmath.rb +++ b/test/bigdecimal/test_bigmath.rb @@ -67,6 +67,14 @@ class TestBigMath < Test::Unit::TestCase assert_in_epsilon(Math.exp(40), exp(BigDecimal("40"), N)) assert_in_epsilon(Math.exp(-N), exp(BigDecimal("-20"), N)) assert_in_epsilon(Math.exp(-40), exp(BigDecimal("-40"), N)) + begin + old_mode = BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY) + BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false) + assert(exp(BigDecimal::INFINITY, N).infinite?, "exp(INFINITY) is not an infinity") + ensure + #BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, old_mode) + end + assert_equal(0.0, exp(-BigDecimal::INFINITY, N)) end def test_log |