diff options
Diffstat (limited to 'spec/ruby/core/kernel/instance_of_spec.rb')
-rw-r--r-- | spec/ruby/core/kernel/instance_of_spec.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/instance_of_spec.rb b/spec/ruby/core/kernel/instance_of_spec.rb new file mode 100644 index 0000000000..4801a1ff96 --- /dev/null +++ b/spec/ruby/core/kernel/instance_of_spec.rb @@ -0,0 +1,40 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe Kernel, "#instance_of?" do + before :each do + @o = KernelSpecs::InstanceClass.new + end + + it "returns true if given class is object's class" do + @o.instance_of?(KernelSpecs::InstanceClass).should == true + [].instance_of?(Array).should == true + ''.instance_of?(String).should == true + end + + it "returns false if given class is object's ancestor class" do + @o.instance_of?(KernelSpecs::AncestorClass).should == false + end + + it "returns false if given class is not object's class nor object's ancestor class" do + @o.instance_of?(Array).should == false + end + + it "returns false if given a Module that is included in object's class" do + @o.instance_of?(KernelSpecs::MyModule).should == false + end + + it "returns false if given a Module that is included one of object's ancestors only" do + @o.instance_of?(KernelSpecs::AncestorModule).should == false + end + + it "returns false if given a Module that is not included in object's class" do + @o.instance_of?(KernelSpecs::SomeOtherModule).should == false + end + + it "raises a TypeError if given an object that is not a Class nor a Module" do + lambda { @o.instance_of?(Object.new) }.should raise_error(TypeError) + lambda { @o.instance_of?('KernelSpecs::InstanceClass') }.should raise_error(TypeError) + lambda { @o.instance_of?(1) }.should raise_error(TypeError) + end +end |