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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
36 lines
1 KiB
Ruby
36 lines
1 KiB
Ruby
require_relative '../../spec_helper'
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require_relative 'fixtures/classes'
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describe "Math.sqrt" do
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it "returns a float" do
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Math.sqrt(1).should be_kind_of(Float)
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end
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it "returns the square root of the argument" do
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Math.sqrt(1).should == 1.0
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Math.sqrt(4.0).should == 2.0
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Math.sqrt(15241578780673814.441547445).should be_close(123456789.123457, 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.sqrt("test") }.should raise_error(TypeError)
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end
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it "returns NaN given NaN" do
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Math.sqrt(nan_value).nan?.should be_true
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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.sqrt(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.sqrt(MathSpecs::Float.new).should be_close(1.0, TOLERANCE)
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end
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end
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describe "Math#sqrt" do
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it "is accessible as a private instance method" do
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IncludesMath.new.send(:sqrt, 2.23).should be_close(1.49331845230681, TOLERANCE)
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end
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end
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