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require 'spec_helper'
module RSpec
module Mocks
describe Matchers::HaveReceived do
describe "expect(...).to have_received" do
it 'passes when the double has received the given message' do
dbl = double_with_met_expectation(:expected_method)
expect(dbl).to have_received(:expected_method)
end
it 'passes when a null object has received the given message' do
dbl = null_object_with_met_expectation(:expected_method)
expect(dbl).to have_received(:expected_method)
end
it 'fails when the double has not received the given message' do
dbl = double_with_unmet_expectation(:expected_method)
expect {
expect(dbl).to have_received(:expected_method)
}.to raise_error(/expected: 1 time/)
end
it 'fails when a null object has not received the given message' do
dbl = double.as_null_object
expect {
expect(dbl).to have_received(:expected_method)
}.to raise_error(/expected: 1 time/)
end
it 'fails when the method has not been previously stubbed' do
dbl = double
expect {
expect(dbl).to have_received(:expected_method)
}.to raise_error(/method has not been stubbed/)
end
it 'fails when the method has been mocked' do
dbl = double
dbl.should_receive(:expected_method)
dbl.expected_method
expect {
expect(dbl).to have_received(:expected_method)
}.to raise_error(/method has been mocked instead of stubbed/)
end
it 'resets expectations on class methods when mocks are reset' do
dbl = Object
dbl.stub(:expected_method)
dbl.expected_method
reset dbl
dbl.stub(:expected_method)
expect {
expect(dbl).to have_received(:expected_method)
}.to raise_error(/0 times/)
end
context "with" do
it 'passes when the given args match the args used with the message' do
dbl = double_with_met_expectation(:expected_method, :expected, :args)
expect(dbl).to have_received(:expected_method).with(:expected, :args)
end
it 'fails when the given args do not match the args used with the message' do
dbl = double_with_met_expectation(:expected_method, :expected, :args)
expect {
expect(dbl).to have_received(:expected_method).with(:unexpected, :args)
}.to raise_error(/with unexpected arguments/)
end
end
it 'generates a useful description' do
matcher = have_received(:expected_method).with(:expected_args).once
expect(matcher.description).to eq 'have received expected_method(:expected_args) 1 time'
end
context "counts" do
let(:dbl) { double(:expected_method => nil) }
before do
dbl.expected_method
dbl.expected_method
dbl.expected_method
end
context "exactly" do
it 'passes when the message was received the given number of times' do
expect(dbl).to have_received(:expected_method).exactly(3).times
end
it 'fails when the message was received more times' do
expect {
expect(dbl).to have_received(:expected_method).exactly(2).times
}.to raise_error(/expected: 2 times.*received: 3 times/m)
end
it 'fails when the message was received fewer times' do
expect {
expect(dbl).to have_received(:expected_method).exactly(4).times
}.to raise_error(/expected: 4 times.*received: 3 times/m)
end
end
context 'at_least' do
it 'passes when the message was received the given number of times' do
expect(dbl).to have_received(:expected_method).at_least(3).times
end
it 'passes when the message was received more times' do
expect(dbl).to have_received(:expected_method).at_least(2).times
end
it 'fails when the message was received fewer times' do
expect {
expect(dbl).to have_received(:expected_method).at_least(4).times
}.to raise_error(/expected: at least 4 times.*received: 3 times/m)
end
end
context 'at_most' do
it 'passes when the message was received the given number of times' do
expect(dbl).to have_received(:expected_method).at_most(3).times
end
it 'passes when the message was received fewer times' do
expect(dbl).to have_received(:expected_method).at_most(4).times
end
it 'fails when the message was received more times' do
expect {
expect(dbl).to have_received(:expected_method).at_most(2).times
}.to raise_error(/expected: at most 2 times.*received: 3 times/m)
end
end
context 'once' do
it 'passes when the message was received once' do
dbl = double(:expected_method => nil)
dbl.expected_method
expect(dbl).to have_received(:expected_method).once
end
it 'fails when the message was never received' do
dbl = double(:expected_method => nil)
expect {
expect(dbl).to have_received(:expected_method).once
}.to raise_error(/expected: 1 time.*received: 0 times/m)
end
it 'fails when the message was received twice' do
dbl = double(:expected_method => nil)
dbl.expected_method
dbl.expected_method
expect {
expect(dbl).to have_received(:expected_method).once
}.to raise_error(/expected: 1 time.*received: 2 times/m)
end
end
context 'twice' do
it 'passes when the message was received twice' do
dbl = double(:expected_method => nil)
dbl.expected_method
dbl.expected_method
expect(dbl).to have_received(:expected_method).twice
end
it 'fails when the message was received once' do
dbl = double(:expected_method => nil)
dbl.expected_method
expect {
expect(dbl).to have_received(:expected_method).twice
}.to raise_error(/expected: 2 times.*received: 1 time/m)
end
it 'fails when the message was received thrice' do
dbl = double(:expected_method => nil)
dbl.expected_method
dbl.expected_method
dbl.expected_method
expect {
expect(dbl).to have_received(:expected_method).twice
}.to raise_error(/expected: 2 times.*received: 3 times/m)
end
end
end
end
describe "expect(...).not_to have_received" do
it 'passes when the double has not received the given message' do
dbl = double_with_unmet_expectation(:expected_method)
expect(dbl).not_to have_received(:expected_method)
end
it 'fails when the double has received the given message' do
dbl = double_with_met_expectation(:expected_method)
expect {
expect(dbl).not_to have_received(:expected_method)
}.to raise_error(/expected: 0 times.*received: 1 time/m)
end
it 'fails when the method has not been previously stubbed' do
dbl = double
expect {
expect(dbl).not_to have_received(:expected_method)
}.to raise_error(/method has not been stubbed/)
end
context "with" do
it 'passes when the given args do not match the args used with the message' do
dbl = double_with_met_expectation(:expected_method, :expected, :args)
expect(dbl).not_to have_received(:expected_method).with(:unexpected, :args)
end
it 'fails when the given args match the args used with the message' do
dbl = double_with_met_expectation(:expected_method, :expected, :args)
expect {
expect(dbl).not_to have_received(:expected_method).with(:expected, :args)
}.to raise_error(/expected: 0 times.*received: 1 time/m) # TODO: better message
end
end
%w(exactly at_least at_most times once twice).each do |constraint|
it "does not allow #{constraint} to be used because it creates confusion" do
dbl = double_with_unmet_expectation(:expected_method)
expect {
expect(dbl).not_to have_received(:expected_method).send(constraint)
}.to raise_error(/can't use #{constraint} when negative/)
end
end
end
def double_with_met_expectation(method_name, *args)
double = double_with_unmet_expectation(method_name)
meet_expectation(double, method_name, *args)
end
def null_object_with_met_expectation(method_name, *args)
meet_expectation(double.as_null_object, method_name, *args)
end
def meet_expectation(double, method_name, *args)
double.send(method_name, *args)
double
end
def double_with_unmet_expectation(method_name)
double('double', method_name => true)
end
end
end
end
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