require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Numeric#coerce" do before :each do @obj = NumericSpecs::Subclass.new @obj.should_receive(:to_f).any_number_of_times.and_return(10.5) end it "returns [other, self] if self and other are instances of the same class" do a = NumericSpecs::Subclass.new b = NumericSpecs::Subclass.new a.coerce(b).should == [b, a] end # I (emp) think that this behavior is actually a bug in MRI. It's here as documentation # of the behavior until we find out if it's a bug. quarantine! do it "considers the presence of a metaclass when checking the class of the objects" do a = NumericSpecs::Subclass.new b = NumericSpecs::Subclass.new # inject a metaclass on a class << a; true; end # watch it explode lambda { a.coerce(b) }.should raise_error(TypeError) end end it "returns [other.to_f, self.to_f] if self and other are instances of different classes" do @obj.coerce(2.5).should == [2.5, 10.5] @obj.coerce(3).should == [3.0, 10.5] @obj.coerce("4.4").should == [4.4, 10.5] @obj.coerce(bignum_value).should == [bignum_value.to_f, 10.5] end it "raise TypeError if they are instances of different classes and other does not respond to #to_f" do other = mock("numeric") lambda { @obj.coerce(other) }.should raise_error(TypeError) end it "raises a TypeError when passed nil" do lambda { @obj.coerce(nil) }.should raise_error(TypeError) end it "raises a TypeError when passed a boolean" do lambda { @obj.coerce(false) }.should raise_error(TypeError) end it "raises a TypeError when passed a Symbol" do lambda { @obj.coerce(:symbol) }.should raise_error(TypeError) end it "raises an ArgumentError when passed a non-numeric String" do lambda { @obj.coerce("test") }.should raise_error(ArgumentError) end end