require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Math.frexp" do it "returns the normalized fraction and exponent" do frac, exp = Math.frexp(102.83) frac.should be_close(0.803359375, TOLERANCE) exp.should == 7 end it "raises a TypeError if the argument cannot be coerced with Float()" do lambda { Math.frexp("test") }.should raise_error(TypeError) end it "returns NaN given NaN" do frac, _exp = Math.frexp(nan_value) frac.nan?.should be_true end it "raises a TypeError if the argument is nil" do lambda { Math.frexp(nil) }.should raise_error(TypeError) end it "accepts any argument that can be coerced with Float()" do frac, exp = Math.frexp(MathSpecs::Float.new) frac.should be_close(0.5, TOLERANCE) exp.should == 1 end end describe "Math#frexp" do it "is accessible as a private instance method" do frac, exp = IncludesMath.new.send(:frexp, 2.1415) frac.should be_close(0.535375, TOLERANCE) exp.should == 2 end end