spec/ruby/core/module/gt_spec.rb


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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)

describe "Module#>" do
  it "returns false if self is a subclass of or includes the given module" do
    (ModuleSpecs::Child > ModuleSpecs::Parent).should be_false
    (ModuleSpecs::Child > ModuleSpecs::Basic).should be_false
    (ModuleSpecs::Child > ModuleSpecs::Super).should be_false
    (ModuleSpecs::Super > ModuleSpecs::Basic).should be_false
  end

  it "returns true if self is a superclass of or included by the given module" do
    (ModuleSpecs::Parent > ModuleSpecs::Child).should == true
    (ModuleSpecs::Basic  > ModuleSpecs::Child).should == true
    (ModuleSpecs::Super  > ModuleSpecs::Child).should == true
    (ModuleSpecs::Basic  > ModuleSpecs::Super).should == true
  end

  it "returns false if self is the same as the given module" do
    (ModuleSpecs::Child  > ModuleSpecs::Child).should == false
    (ModuleSpecs::Parent > ModuleSpecs::Parent).should == false
    (ModuleSpecs::Basic  > ModuleSpecs::Basic).should == false
    (ModuleSpecs::Super  > ModuleSpecs::Super).should == false
  end

  it "returns nil if self is not related to the given module" do
    (ModuleSpecs::Parent > ModuleSpecs::Basic).should == nil
    (ModuleSpecs::Parent > ModuleSpecs::Super).should == nil
    (ModuleSpecs::Basic  > ModuleSpecs::Parent).should == nil
    (ModuleSpecs::Super  > ModuleSpecs::Parent).should == nil
  end

  it "raises a TypeError if the argument is not a class/module" do
    lambda { ModuleSpecs::Parent > mock('x') }.should raise_error(TypeError)
  end
end