Contents

require 'spec_helper'

module Spy
  describe Double do
    before(:all) do
      Module.class_eval do
        private
        def use; end
      end
    end

    after(:all) do
      Module.class_eval do
        undef use
      end
    end

    it 'can be extended onto a module to make it a pure test double that can mock private methods' do
      double = Module.new
      Spy.on(double, :use)
      expect { double.use }.to raise_error(/private method `use' called/)

      double = Module.new { TestDouble.extend_onto(self) }
      double.should_receive(:use).and_return(:ok)
      expect(double.use).to be(:ok)
    end

    it 'sets the test double name when a name is passed' do
      double = Module.new { TestDouble.extend_onto(self, "MyDouble") }
      expect { double.foo }.to raise_error(/Mock "MyDouble" received/)
    end

    it 'stubs the methods passed in the stubs hash' do
      double = Module.new do
        TestDouble.extend_onto(self, "MyDouble", :a => 5, :b => 10)
      end

      expect(double.a).to eq(5)
      expect(double.b).to eq(10)
    end

    it 'indicates what type of test double it is in error messages' do
      double = Module.new do
        TestDouble.extend_onto(self, "A", :__declared_as => "ModuleMock")
      end
      expect { double.foo }.to raise_error(/ModuleMock "A"/)
    end

    it 'is declared as a mock by default' do
      double = Module.new { TestDouble.extend_onto(self) }
      expect { double.foo }.to raise_error(/Mock received/)
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
spy-0.1.0	spec/spy/test_double_spec.rb