Project: RSpec Mocks 2.99

Publisher: RSpec

allow a message on any instance of a class

Use allow_any_instance_of(Class).to receive when you want to configure how
instances of the given class respond to a message without setting an
expectation that the message will be received.

Scenarios

allowing a message on any instance of a class

Given

a file named "example_spec.rb" with:

describe "any_instance.should_receive" do
  before do
    allow_any_instance_of(Object).to receive(:foo).and_return(:return_value)
  end

  it "allows any instance of the class to receive the message" do
    o = Object.new
    expect(o.foo).to eq(:return_value)
  end

  it "passes even if no instances receive that message" do
    o = Object.new
  end
end

When

I run rspec example_spec.rb

Then

the examples should all pass

Last published over 6 years ago by myronmarston.

allow a message on any instance of a class

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