21 lines
470 B
Ruby
21 lines
470 B
Ruby
require 'facets/math/sign'
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test_case Math do
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class_method :sign do
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test do
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Math.sign(-3.1).assert == -1.0
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Math.sign( 0.0).assert == 0.0
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Math.sign( 3.1).assert == 1.0
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end
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# Check complementarity of abs and sign
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#assert_equal_float(-2.0, Math.abs(-2.0) * Math.sign(-2.0), 1e-6)
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#assert_equal_float( 0.0, Math.abs( 0.0) * Math.sign( 0.0), 1e-6)
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#assert_equal_float( 3.0, Math.abs( 3.0) * Math.sign( 3.0), 1e-6)
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end
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end
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