gistfile1.rb

describe Foo do

  describe "Equality" do

    it "is reflexive" do
      foo = Foo.new(1,2)
      expect(foo).to eq(foo)
    end

    describe "is symmetric" do
      foo  = Foo.new(1,2)
      bar = Foo.new(1,2)

      it "foo is equal to bar" { expect(foo).to eq(bar) }
      it "bar is equal to foo" { expect(bar).to eq(foo) }
    end

    describe "is transitive" do
      foo = Foo.new(1,2)
      bar = Foo.new(1,2)
      grill = Foo.new(1,2)

      it "foo is equal to bar"   { expect(foo).to eq(bar) }
      it "bar is equal to grill" { expect(bar).to eq(grill) }
      it "grill is equal to foo" { expect(grill).to eq(bar) }
    end

    it "is not equal for nil" do
      foo = Foo.new(1,2)
      expect(foo).to_not eq(nil)
    end

    it "is not equal for different types" do
      foo = Foo.new(1,2)
      expect(foo.class).to_not eq(Object.class)
    end

    it "hashes are equal if objects are equal" do
      foo = Foo.new(1,2)
      bar = Foo.new(1,2)
      expect(foo.hash).to eq(bar.hash)
    end

  end
  
end