20 lines
642 B
Ruby
20 lines
642 B
Ruby
require 'facets/math/sech'
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require 'facets/numeric/range' # used to test within a precision
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test_case Math do
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class_method :sech do
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test do
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Math.sech(1.0).range(1.0e-6).assert === 1.0 / Math.cosh(1.0)
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Math.sech(2.0).range(1.0e-6).assert === 1.0 / Math.cosh(2.0)
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end
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end
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# TODO: Check complementarity of cosh and sech
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#assert_equal_float(1.0, Math.sech(-2.0) * Math.cosh(-2.0), 1.0e-6)
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#assert_equal_float(1.0, Math.sech(-1.0) * Math.cosh(-1.0), 1.0e-6)
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#assert_equal_float(1.0, Math.sech( 1.0) * Math.cosh( 1.0), 1.0e-6)
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#assert_equal_float(1.0, Math.sech( 2.0) * Math.cosh( 2.0), 1.0e-6)
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end
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