Feature #10225 ยป _ test_math.rb Add tests for Math.normcdf.PATCH
test/ruby/test_math.rb  

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check(0, Math.erfc(1.0 / 0.0)) 
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end 
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def test_normcdf 

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check(0.5, Math.normcdf(0)) 

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check(0.9772498680518208, Math.normcdf(2)) 

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check(1.0, Math.normcdf(2) + Math.normcdf(2)) 

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check(1.0, Math.normcdf(Float::INFINITY)) 

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check(0.0, Math.normcdf(Float::INFINITY)) 

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end 

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def test_gamma 
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sqrt_pi = Math.sqrt(Math::PI) 
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check(4 * sqrt_pi / 3, Math.gamma(1.5)) 