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 `expect`
Use expect(object).to receive(:message)
to set an expectation that
object
should receive the message :message
before the example is
completed.
Note: You can use expect_any_instance_of
when you don't have a reference
to the object that receives a message in your test. For more information,
see the message_expectations/expect_any_instance_of feature.
- 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" describe Account do context "when closed" do it "logs an account closed message" do logger = double("logger") account = Account.new logger expect(logger).to 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" describe Account do context "when closed" do it "logs an account closed message" do logger = double("logger") account = Account.new logger expect(logger).to 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:
describe "a message expectation with a return value" do context "specified in a block" do it "returns the specified value" do object = double("object") expect(object).to 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") expect(object).to 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:
describe "a message expectation with a count" do it "passes if the expected number of calls happen" do string = "hi" expect(string).to 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.