require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Math.asinh" do it "returns a float" do Math.asinh(1.5).should be_kind_of(Float) end it "returns the inverse hyperbolic sin of the argument" do Math.asinh(1.5).should be_close(1.19476321728711, TOLERANCE) Math.asinh(-2.97).should be_close(-1.8089166921397, TOLERANCE) Math.asinh(0.0).should == 0.0 Math.asinh(-0.0).should == -0.0 Math.asinh(1.05367e-08).should be_close(1.05367e-08, TOLERANCE) Math.asinh(-1.05367e-08).should be_close(-1.05367e-08, TOLERANCE) # Default tolerance does not scale right for these... #Math.asinh(94906265.62).should be_close(19.0615, TOLERANCE) #Math.asinh(-94906265.62).should be_close(-19.0615, TOLERANCE) end it "raises a TypeError if the argument cannot be coerced with Float()" do lambda { Math.asinh("test") }.should raise_error(TypeError) end it "returns NaN given NaN" do Math.asinh(nan_value).nan?.should be_true end it "raises a TypeError if the argument is nil" do lambda { Math.asinh(nil) }.should raise_error(TypeError) end it "accepts any argument that can be coerced with Float()" do Math.asinh(MathSpecs::Float.new).should be_close(0.881373587019543, TOLERANCE) end end describe "Math#asinh" do it "is accessible as a private instance method" do IncludesMath.new.send(:asinh, 19.275).should be_close(3.65262832292466, TOLERANCE) end end