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require 'spec_helper'
describe RSpec::Mocks::Mock do
let(:obj) { double }
describe "#and_yield" do
context 'when the method double has been constrained by `with`' do
it 'uses the default stub if the provided args do not match' do
obj.stub(:foo) { 15 }
obj.stub(:foo).with(:yield).and_yield
# should_receive is required to trigger the bug:
# https://github.com/rspec/rspec-mocks/issues/127
obj.should_receive(:foo)
expect(obj.foo(:dont_yield)).to eq(15)
end
end
context "with eval context as block argument" do
it "evaluates the supplied block as it is read" do
evaluated = false
obj.stub(:method_that_accepts_a_block).and_yield do |eval_context|
evaluated = true
end
expect(evaluated).to be_true
end
it "passes an eval context object to the supplied block" do
obj.stub(:method_that_accepts_a_block).and_yield do |eval_context|
expect(eval_context).not_to be_nil
end
end
it "evaluates the block passed to the stubbed method in the context of the supplied eval context" do
expected_eval_context = nil
actual_eval_context = nil
obj.stub(:method_that_accepts_a_block).and_yield do |eval_context|
expected_eval_context = eval_context
end
obj.method_that_accepts_a_block do
actual_eval_context = self
end
expect(actual_eval_context).to equal(expected_eval_context)
end
context "and no yielded arguments" do
it "passes when expectations set on the eval context are met" do
configured_eval_context = nil
obj.stub(:method_that_accepts_a_block).and_yield do |eval_context|
configured_eval_context = eval_context
configured_eval_context.should_receive(:foo)
end
obj.method_that_accepts_a_block do
foo
end
verify configured_eval_context
end
it "fails when expectations set on the eval context are not met" do
configured_eval_context = nil
obj.stub(:method_that_accepts_a_block).and_yield do |eval_context|
configured_eval_context = eval_context
configured_eval_context.should_receive(:foo)
end
obj.method_that_accepts_a_block do
# foo is not called here
end
expect { verify configured_eval_context }.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
context "and yielded arguments" do
it "passes when expectations set on the eval context and yielded arguments are met" do
configured_eval_context = nil
yielded_arg = Object.new
obj.stub(:method_that_accepts_a_block).and_yield(yielded_arg) do |eval_context|
configured_eval_context = eval_context
configured_eval_context.should_receive(:foo)
yielded_arg.should_receive(:bar)
end
obj.method_that_accepts_a_block do |obj|
obj.bar
foo
end
verify configured_eval_context
verify yielded_arg
end
it "fails when expectations set on the eval context and yielded arguments are not met" do
configured_eval_context = nil
yielded_arg = Object.new
obj.stub(:method_that_accepts_a_block).and_yield(yielded_arg) do |eval_context|
configured_eval_context = eval_context
configured_eval_context.should_receive(:foo)
yielded_arg.should_receive(:bar)
end
obj.method_that_accepts_a_block do |obj|
# obj.bar is not called here
# foo is not called here
end
expect { verify configured_eval_context }.to raise_error(RSpec::Mocks::MockExpectationError)
expect { verify yielded_arg }.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
end
end
end
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