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58 lines
1.6 KiB
Ruby
58 lines
1.6 KiB
Ruby
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require 'test/unit'
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require "-test-/float"
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class TestFloatExt < Test::Unit::TestCase
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NEXTAFTER_VALUES = [
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-Float::INFINITY,
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-Float::MAX,
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-100.0,
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-1.0-Float::EPSILON,
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-1.0,
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-Float::EPSILON,
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-Float::MIN/2,
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-Math.ldexp(0.5, Float::MIN_EXP - Float::MANT_DIG + 1),
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-0.0,
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0.0,
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Math.ldexp(0.5, Float::MIN_EXP - Float::MANT_DIG + 1),
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Float::MIN/2,
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Float::MIN,
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Float::EPSILON,
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1.0,
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1.0+Float::EPSILON,
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100.0,
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Float::MAX,
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Float::INFINITY,
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Float::NAN
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]
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test_number = 0
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NEXTAFTER_VALUES.each {|n1|
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NEXTAFTER_VALUES.each {|n2|
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tag = n2.infinite? ? "ruby" : "other"
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test_name = "test_nextafter_#{test_number}_#{tag}_#{n1}_#{n2}"
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test_number += 1
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define_method(test_name) {
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v1 = Bug::Float.missing_nextafter(n1, n2)
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v2 = Bug::Float.system_nextafter(n1, n2)
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assert_kind_of(Float, v1)
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assert_kind_of(Float, v2)
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if v1.nan?
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assert(v2.nan?, "Bug::Float.system_nextafter(#{n1}, #{n2}).nan?")
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else
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assert_equal(v1, v2,
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"Bug::Float.missing_nextafter(#{'%a' % n1}, #{'%a' % n2}) = #{'%a' % v1} != " +
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"#{'%a' % v2} = Bug::Float.system_nextafter(#{'%a' % n1}, #{'%a' % n2})")
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if v1 == 0
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s1 = 1.0/v1 < 0 ? "negative-zero" : "positive-zero"
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s2 = 1.0/v2 < 0 ? "negative-zero" : "positive-zero"
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assert_equal(s1, s2,
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"Bug::Float.missing_nextafter(#{'%a' % n1}, #{'%a' % n2}) = #{'%a' % v1} != " +
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"#{'%a' % v2} = Bug::Float.system_nextafter(#{'%a' % n1}, #{'%a' % n2})")
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end
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end
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}
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}
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}
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end
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