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* For easier modifications of ruby/spec by MRI developers. * .gitignore: track changes under spec. * spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec. These files can therefore be updated like any other file in MRI. Instructions are provided in spec/README. [Feature #13156] [ruby-core:79246] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
27 lines
850 B
Ruby
27 lines
850 B
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require File.expand_path('../fixtures/classes', __FILE__)
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describe "Math.cbrt" do
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it "returns a float" do
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Math.cbrt(1).should be_an_instance_of(Float)
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end
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it "returns the cubic root of the argument" do
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Math.cbrt(1).should == 1.0
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Math.cbrt(8.0).should == 2.0
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Math.cbrt(-8.0).should == -2.0
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Math.cbrt(3).should be_close(1.44224957030741, TOLERANCE)
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end
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it "raises a TypeError if the argument cannot be coerced with Float()" do
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lambda { Math.cbrt("foobar") }.should raise_error(TypeError)
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end
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it "raises a TypeError if the argument is nil" do
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lambda { Math.cbrt(nil) }.should raise_error(TypeError)
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end
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it "accepts any argument that can be coerced with Float()" do
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Math.cbrt(MathSpecs::Float.new).should be_close(1.0, TOLERANCE)
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end
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end
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