Method: Incline::Extensions::TestCase#assert_required

Defined in:
lib/incline/extensions/test_case.rb

#assert_required(model, attribute, message = nil, regex = /can't be blank/i) ⇒ Object

Tests a specific field for presence validation.

model

This must respond to attribute and attribute= as well as valid? and errors.

attribute

This must provide the name of a valid attribute in the model.

message

This is optional, but if provided it will be postfixed with the failure reason.

regex

This is the regex to match against the error message to ensure that the failure is for the correct reason.



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# File 'lib/incline/extensions/test_case.rb', line 264

def assert_required(model, attribute, message = nil, regex = /can't be blank/i)
  original_value = model.send(attribute)
  assert model.valid?, 'Model should be valid to start.'
  is_string = original_value.is_a?(::String)
  setter = :"#{attribute}="
  model.send setter, nil
  assert_not model.valid?, message ? (message + ': (nil)') : "Should not allow #{attribute} to be set to nil."
  assert model.errors[attribute].to_s =~ regex, message ? (message + ': (error message)') : 'Did not fail for expected reason.'
  if is_string
    model.send setter, ''
    assert_not model.valid?, message ? (message + ": ('')") : "Should not allow #{attribute} to be set to empty string."
    assert model.errors[attribute].to_s =~ regex, message ? (message + ': (error message)') : 'Did not fail for expected reason.'
    model.send setter, '   '
    assert_not model.valid?, message ? (message + ": ('   ')") : "Should not allow #{attribute} to be set to blank string."
    assert model.errors[attribute].to_s =~ regex, message ? (message + ': (error message)') : 'Did not fail for expected reason.'
  end
  model.send setter, original_value
  assert model.valid?, message ? (message + ": !(#{original_value.inspect})") : "Should allow #{attribute} to be set back to '#{original_value.inspect}'."
end