To add a collaborator to this project you will need to use the Relish gem to add the collaborator via a terminal command. Soon you'll be able to also add collaborators here!
More about adding a collaboratorexpect message using `should_receive`
Use object.should_receive(:message)
to set an expectation that
object
should receive the message :message
before the example is
completed.
- Background
-
- Given
-
a file named "spec/spec_helper.rb" with:
RSpec.configure do |config| config.mock_with :rspec do |mocks| mocks.syntax = :should end end
- Scenarios
-
- expect a message
- expect a message with an argument
- provide a return value
- expect a specific number of calls
- expect a message
-
- Given
-
a file named "spec/account_spec.rb" with:
require "account" require "spec_helper" describe Account do context "when closed" do it "logs an account closed message" do logger = double("logger") account = Account.new logger logger.should_receive(:account_closed) account.close end end end
- And
-
a file named "lib/account.rb" with:
Account = Struct.new(:logger) do def close logger.account_closed end end
- When
-
I run
rspec spec/account_spec.rb
- Then
- the output should contain "1 example, 0 failures"
- expect a message with an argument
-
- Given
-
a file named "spec/account_spec.rb" with:
require "account" require "spec_helper" describe Account do context "when closed" do it "logs an account closed message" do logger = double("logger") account = Account.new logger logger.should_receive(:account_closed).with(account) account.close end end end
- And
-
a file named "lib/account.rb" with:
Account = Struct.new(:logger) do def close logger.account_closed(self) end end
- When
-
I run
rspec spec/account_spec.rb
- Then
- the output should contain "1 example, 0 failures"
- provide a return value
-
- Given
-
a file named "spec/message_expectation_spec.rb" with:
require "spec_helper" describe "a message expectation with a return value" do context "specified in a block" do it "returns the specified value" do object = double("object") object.should_receive(:message) { :return_value } object.message.should eq(:return_value) end end context "specified with and_return" do it "returns the specified value" do object = double("object") object.should_receive(:message).and_return(:return_value) object.message.should eq(:return_value) end end end
- When
-
I run
rspec spec/message_expectation_spec.rb
- Then
- the output should contain "2 examples, 0 failures"
- expect a specific number of calls
-
- Given
-
a file named "spec/message_count_spec.rb" with:
require "spec_helper" describe "a message expectation with a count" do it "passes if the expected number of calls happen" do string = "hi" string.should_receive(:length).exactly(3).times 3.times { string.length } end end
- When
-
I run
rspec spec/message_count_spec.rb
- Then
- the output should contain "1 example, 0 failures"
Last published over 7 years ago by myronmarston.