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|
Feature: expect 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:
"""ruby
RSpec.configure do |config|
config.mock_with :rspec do |mocks|
mocks.syntax = :should
end
end
"""
Scenario: expect a message
Given a file named "spec/account_spec.rb" with:
"""ruby
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:
"""ruby
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"
Scenario: expect a message with an argument
Given a file named "spec/account_spec.rb" with:
"""ruby
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:
"""ruby
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"
Scenario: provide a return value
Given a file named "spec/message_expectation_spec.rb" with:
"""ruby
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"
Scenario: expect a specific number of calls
Given a file named "spec/message_count_spec.rb" with:
"""ruby
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"
|
