require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Math.sqrt" do it "returns a float" do Math.sqrt(1).should be_kind_of(Float) end it "returns the square root of the argument" do Math.sqrt(1).should == 1.0 Math.sqrt(4.0).should == 2.0 Math.sqrt(15241578780673814.441547445).should be_close(123456789.123457, TOLERANCE) end it "raises a TypeError if the argument cannot be coerced with Float()" do -> { Math.sqrt("test") }.should raise_error(TypeError) end it "returns NaN given NaN" do Math.sqrt(nan_value).nan?.should be_true end it "raises a TypeError if the argument is nil" do -> { Math.sqrt(nil) }.should raise_error(TypeError) end it "accepts any argument that can be coerced with Float()" do Math.sqrt(MathSpecs::Float.new).should be_close(1.0, TOLERANCE) end end describe "Math#sqrt" do it "is accessible as a private instance method" do IncludesMath.new.send(:sqrt, 2.23).should be_close(1.49331845230681, TOLERANCE) end end