RSpec is a Behaviour Driven Development framework for writing executable code examples.
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Spec::Example provides a framework for organizing executable code examples
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Spec::Expectations adds #should and #should_not to every object
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Spec::Matchers provides Expression Matchers for use with #should and #should_not
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Spec::Mocks is a full featured mock object/stubbing library
describe Account do
context "transfering money" do
it "deposits transfer amount to the other account" do
source = Account.new(50, :USD)
target = mock('target account')
target.should_receive(:deposit).with(Money.new(5, :USD))
source.transfer(5, :USD).to(target)
end
it "reduces its balance by the transfer amount" do
source = Account.new(50, :USD)
target = stub('target account')
source.transfer(5, :USD).to(target)
source.balance.should == Money.new(45, :USD)
end
end
end
$ spec spec/account_spec.rb --format nested
Account
transfering money
deposits transfer amount to the other account
reduces its balance by the transfer amount
2 examples, 0 failures
[sudo] gem install rspec or clone, build, install - See http://wiki.github.com/dchelimsky/rspec