Sha256: 17f9bbe0f575eb3793993aa1e84c945a81e6f845ab7001ff09bf7917b118bee6

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Size: 1.5 KB

Versions: 64

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Stored size: 1.5 KB

Contents

require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/../../spec_helper'
require File.dirname(File.join(__rhoGetCurrentDir(), __FILE__)) + '/fixtures/classes'

# cosine : (-Inf, Inf) --> (-1.0, 1.0)
describe "Math.cos" do  
  it "returns a float" do 
    Math.cos(Math::PI).should be_kind_of(Float)
  end 

  it "returns the cosine of the argument expressed in radians" do    
    Math.cos(Math::PI).should be_close(-1.0, TOLERANCE)
    Math.cos(0).should be_close(1.0, TOLERANCE)
    Math.cos(Math::PI/2).should be_close(0.0, TOLERANCE)    
    Math.cos(3*Math::PI/2).should be_close(0.0, TOLERANCE)
    Math.cos(2*Math::PI).should be_close(1.0, TOLERANCE)
  end  


  ruby_version_is ""..."1.9" do
    it "raises an ArgumentError if the argument cannot be coerced with Float()" do    
      lambda { Math.cos("test") }.should raise_error(ArgumentError)
    end
  end
  
  ruby_version_is "1.9" do
    it "raises a TypeError unless the argument is Numeric and has #to_f" do    
      lambda { Math.cos("test") }.should raise_error(TypeError)
    end
  end

  it "raises a TypeError if the argument is nil" do
    lambda { Math.cos(nil) }.should raise_error(TypeError)
  end
  
  it "coerces its argument with #to_f" do
    f = mock_numeric('8.2')
    f.should_receive(:to_f).and_return(8.2)
    Math.cos(f).should == Math.cos(8.2)
  end
end  

describe "Math#cos" do
  it "is accessible as a private instance method" do
    IncludesMath.new.send(:cos, 3.1415).should be_close(-0.999999995707656, TOLERANCE)
  end
end

Version data entries

64 entries across 64 versions & 1 rubygems

Version Path
rhodes-3.1.1 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.1.beta spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.0 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.0.beta.5 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.0.beta.4 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.0.beta.3 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.0.beta.2 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.1.0.beta.1 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.2 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.2.beta.1 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.8 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.7 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.6 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.5 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.4 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.3 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.1.beta.2 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.0 spec/framework_spec/app/spec/core/math/cos_spec.rb
rhodes-3.0.0.beta.7 spec/framework_spec/app/spec/core/math/cos_spec.rb