Throwing

Use and_throw to make the test double throw the provided symbol, optionally with the provided argument.

• and_throw(:symbol)
• and_throw(:symbol, argument)

Throw a symbol

Given a file named "and_throw_spec.rb" with:

RSpec.describe "Making it throw a symbol" do
  it "throws the provided symbol" do
    dbl = double
    allow(dbl).to receive(:foo).and_throw(:hello)

    catch :hello do
      dbl.foo
      fail "should not get here"
    end
  end

  it "includes the provided argument when throwing" do
    dbl = double
    allow(dbl).to receive(:foo).and_throw(:hello, "world")

    arg = catch :hello do
      dbl.foo
      fail "should not get here"
    end

    expect(arg).to eq("world")
  end
end

When I run rspec and_throw_spec.rb

Then the examples should all pass.