问题
How can one test if a certain action raises an ActionController::ParameterMissing
exception?
For example:
it "raises an exception" do
post :create, {}
expect(response).to raise ActionController::ParameterMissing
end
The above does not seem to work, it will fail the test with the ActionController::ParameterMissing
exception.
回答1:
Use the expect block syntax using the raise_error matcher:
it "raises an exception" do
expect{ post(:create, {}) }.to raise_error ActionController::ParameterMissing
end
The reason that your code doesn't work is that post(:create, {})
raises the exception. This happens before the expect(response).to ...
code gets executes. Since the #post
message is not in a begin...end
block, the raised exception is passed up to RSpec failing the test.
来源:https://stackoverflow.com/questions/16724561/rspec-testing-strong-parameters-actioncontrollerparametermissing