Skip to main content

Mocking with rr

Configure RSpec to use rr as shown in the scenarios below.

Passing message expectation​

Given a file named "example_spec.rb" with:

RSpec.configure do |config|
  config.mock_with :rr
end

RSpec.describe "mocking with RSpec" do
  it "passes when it should" do
    receiver = Object.new
    mock(receiver).message
    receiver.message
  end
end

When I run rspec example_spec.rb

Then the examples should all pass.

Failing message expectation​

Given a file named "example_spec.rb" with:

RSpec.configure do |config|
  config.mock_with :rr
end

RSpec.describe "mocking with RSpec" do
  it "fails when it should" do
    receiver = Object.new
    mock(receiver).message
  end
end

When I run rspec example_spec.rb

Then the output should contain "1 example, 1 failure".

Failing message expectation in pending example (remains pending)​

Given a file named "example_spec.rb" with:

RSpec.configure do |config|
  config.mock_with :rr
end

RSpec.describe "failed message expectation in a pending example" do
  it "is listed as pending" do
    pending
    receiver = Object.new
    mock(receiver).message
  end
end

When I run rspec example_spec.rb

Then the output should contain "1 example, 0 failures, 1 pending"

And the exit status should be 0.

Passing message expectation in pending example (fails)​

Given a file named "example_spec.rb" with:

RSpec.configure do |config|
  config.mock_with :rr
end

RSpec.describe "passing message expectation in a pending example" do
  it "fails with FIXED" do
    pending
    receiver = Object.new
    mock(receiver).message
    receiver.message
  end
end

When I run rspec example_spec.rb

Then the output should contain "FIXED"

Then the output should contain "1 example, 1 failure"

And the exit status should be 1.

Accessing RSpec.configuration.mock_framework.framework_name​

Given a file named "example_spec.rb" with:

RSpec.configure do |config|
  config.mock_with :rr
end

RSpec.describe "RSpec.configuration.mock_framework.framework_name" do
  it "returns :rr" do
    expect(RSpec.configuration.mock_framework.framework_name).to eq(:rr)
  end
end

When I run rspec example_spec.rb

Then the examples should all pass.