ruby Rspec测试框架cheetsheet

项目使用Rspec测试框架,一堆should等等方法容易忘记,这里收集了下:
INSTALL
=======

$ gem install rspec

RSPEC-RAILS
===========

RAILS-3
=======

CONFIGURE THE GEMFILE
======================
group :development, :test do
gem "rspec-rails", "~> 2.0"
end

INSTALL THE BUNDLE
===============================
$ bundle install

BOOTSTRAP THE APP
=================
$ ./script/rails generate rspec:install
create .rspec
create spec
create spec/spec_helper.rb
create autotest
create autotest/discover.rb

RAILS-2
=======

INSTALL
=======
$ gem install rspec-rails -v 1.3.3

BOOTSTRAP THE APP
=================
$ ./script/generate rspec
create spec
create spec/spec_helper.rb
create spec/spec.opts
create previous_failures.txt
create script/spec_server
create script/spec

HOW TO USE
==========

COMMAND LINE
=============
rspec --color --format doc spec/widget_spec.rb

RAILS 3 (RSPEC 2)
=============
./rails/generate model User
rake -T spec # lists all rspec rake tasks
rake spec # run all specs
rake spec/models/mymodel_spec.rb # run a single spec file
rake spec/models/mymodel_spec.rb:27 # run a single example or group on line 27

RAILS 2 (RSPEC 1)
=============
./script/generate rspec_model User
rake -T spec # lists all rspec rake tasks
rake spec # run all specs
rake spec SPEC=spec/models/mymodel_spec.rb SPEC_OPTS="-e "should do
something"" #run a single spec


module UserSpecHelper
def valid_user_attributes
{ :email => "joe@bloggs.com",
:username => "joebloggs",
:password => "abcdefg"}
end
end


describe "A User (in general)" do
include UserSpecHelper

before(:each) do
@user = User.new
end

it "should be invalid without a username" do
pending "some other thing we depend on"
@user.attributes = valid_user_attributes.except(:username)
@user.should_not be_valid
@user.should have(1).error_on(:username)
@user.errors.on(:username).should == "is required"
@user.username = "someusername"
@user.should be_valid
end
end

EXPECTATIONS
=====================

target.should satisfy {|arg| ...}
target.should_not satisfy {|arg| ...}

target.should equal
target.should_not equal

target.should be_close ,
target.should_not be_close ,

target.should be
target.should_not be

target.should predicate [optional args]
target.should be_predicate [optional args]
target.should_not predicate [optional args]
target.should_not be_predicate [optional args]

target.should be < 6
target.should == 5
target.should be_between(1, 10)
target.should_not == 'Samantha'

target.should match
target.should_not match

target.should be_an_instance_of
target.should_not be_an_instance_of

target.should be_a_kind_of
target.should_not be_a_kind_of

target.should respond_to
target.should_not respond_to

lambda {a_call}.should raise_error
lambda {a_call}.should raise_error( [, message])
lambda {a_call}.should_not raise_error
lambda {a_call}.should_not raise_error( [, message])
lambda {a_call}.should change(instance, method).from(number).to(number)

proc.should throw
proc.should_not throw

target.should include
target.should_not include

target.should have().things
target.should have_at_least().things
target.should have_at_most().things

target.should have().errors_on(:field)

expect { thing.approve! }.to change(thing, :status).
from(Status::AWAITING_APPROVAL).
to(Status::APPROVED)

expect { thing.destroy }.to change(Thing, :count).by(-1)

Mocks and Stubs(打桩)
===============

user_mock = mock "User"
user_mock.should_receive(:authenticate).with("password").and_return(true)
user_mock.should_receive(:coffee).exactly(3).times.and_return(:americano)
user_mock.should_receive(:coffee).exactly(5).times.and_raise(NotEnoughCoffeeExcep
ion)

people_stub = mock "people"
people_stub.stub!(:each).and_yield(mock_user)
people_stub.stub!(:bad_method).and_raise(RuntimeError)

user_stub = mock_model("User", :id => 23, :username => "pat", :email =>
"pat@example.com")

my_instance.stub!(:msg).and_return(value)
MyClass.stub!(:msg).and_return(value)

Examples (in the real world)

============================
http://madhatted.com/2008/7/10/rspec-real-world-testing
presentation: http://kerryb.github.com/iprug-rspec-presentation/#31
 
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