/
multiple_return_value_spec.rb
132 lines (112 loc) · 4.59 KB
/
multiple_return_value_spec.rb
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require 'spec_helper'
module RSpec
module Mocks
describe "a double stubbed with multiple return values" do
let(:a_double) { double }
before do
a_double.stub(:foo).and_return(:val_1, nil)
end
it 'can still set a message expectation with a single return value' do
a_double.should_receive(:foo).once.and_return(:val_1)
expect(a_double.foo).to eq(:val_1)
end
end
describe "a message expectation with multiple return values and no specified count" do
before(:each) do
@double = double
@return_values = [1,2,3]
@double.should_receive(:do_something).and_return(@return_values[0],@return_values[1],@return_values[2])
end
it "returns values in order" do
expect(@double.do_something).to eq @return_values[0]
expect(@double.do_something).to eq @return_values[1]
expect(@double.do_something).to eq @return_values[2]
verify @double
end
it "falls back to a previously stubbed value" do
@double.stub :do_something => :stub_result
expect(@double.do_something).to eq @return_values[0]
expect(@double.do_something).to eq @return_values[1]
expect(@double.do_something).to eq @return_values[2]
expect(@double.do_something).to eq :stub_result
end
it "fails when there are too few calls (if there is no stub)" do
@double.do_something
@double.do_something
expect { verify @double }.to raise_error
end
it "fails when there are too many calls (if there is no stub)" do
@double.do_something
@double.do_something
@double.do_something
@double.do_something
expect { verify @double }.to raise_error
end
end
describe "a message expectation with multiple return values with a specified count equal to the number of values" do
before(:each) do
@double = double
@return_values = [1,2,3]
@double.should_receive(:do_something).exactly(3).times.and_return(@return_values[0],@return_values[1],@return_values[2])
end
it "returns values in order to consecutive calls" do
expect(@double.do_something).to eq @return_values[0]
expect(@double.do_something).to eq @return_values[1]
expect(@double.do_something).to eq @return_values[2]
verify @double
end
end
describe "a message expectation with multiple return values specifying at_least less than the number of values" do
before(:each) do
@double = double
@double.should_receive(:do_something).at_least(:twice).with(no_args).and_return(11, 22)
end
it "uses the last return value for subsequent calls" do
expect(@double.do_something).to equal(11)
expect(@double.do_something).to equal(22)
expect(@double.do_something).to equal(22)
verify @double
end
it "fails when called less than the specified number" do
expect(@double.do_something).to equal(11)
expect { verify @double }.to raise_error(RSpec::Mocks::MockExpectationError)
end
context "when method is stubbed too" do
before { @double.stub(:do_something).and_return :stub_result }
it "uses the last value for subsequent calls" do
expect(@double.do_something).to equal(11)
expect(@double.do_something).to equal(22)
expect(@double.do_something).to equal(22)
verify @double
end
it "fails when called less than the specified number" do
expect(@double.do_something).to equal(11)
expect { verify @double }.to raise_error(RSpec::Mocks::MockExpectationError)
end
end
end
describe "a message expectation with multiple return values with a specified count larger than the number of values" do
before(:each) do
@double = RSpec::Mocks::Mock.new("double")
@double.should_receive(:do_something).exactly(3).times.and_return(11, 22)
end
it "uses the last return value for subsequent calls" do
expect(@double.do_something).to equal(11)
expect(@double.do_something).to equal(22)
expect(@double.do_something).to equal(22)
verify @double
end
it "fails when called less than the specified number" do
@double.do_something
@double.do_something
expect { verify @double }.to raise_error
end
it "fails fast when called greater than the specified number" do
@double.do_something
@double.do_something
@double.do_something
expect { @double.do_something }.to raise_error
end
end
end
end