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Feature: Partial doubles
When the `verify_partial_doubles` configuration option is set, the same argument and
method existence checks that are performed for [`object_double`](./using-an-object-double) are also performed on
[partial doubles](../basics/partial-test-doubles). You should set this unless you have a good reason not to. It defaults to off
only for backwards compatibility.
Scenario: doubling an existing object
Given a file named "spec/user_spec.rb" with:
"""ruby
class User
def save; false; end
end
def save_user(user)
"saved!" if user.save
end
RSpec.configure do |config|
config.mock_with :rspec do |mocks|
mocks.verify_partial_doubles = true
end
end
RSpec.describe '#save_user' do
it 'renders message on success' do
user = User.new
expect(user).to receive(:saave).and_return(true) # Typo in name
expect(save_user(user)).to eq("saved!")
end
end
"""
When I run `rspec spec/user_spec.rb`
Then the output should contain "1 example, 1 failure"
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