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November 3, 2009 09:15
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# You can test whether an object is compliant with the ActiveModel API by | |
# including ActiveModel::Lint::Tests in your TestCase. It will included | |
# tests that tell you whether your object is fully compliant, or if not, | |
# which aspects of the API are not implemented. | |
# | |
# These tests do not attempt to determine the semantic correctness of the | |
# returned values. For instance, you could implement valid? to always | |
# return true, and the tests would pass. It is up to you to ensure that | |
# the values are semantically meaningful. | |
# | |
# Objects you pass in are expected to return a compliant object from a | |
# call to to_model. It is perfectly fine for to_model to return self. | |
module ActiveModel | |
module Lint | |
module Tests | |
# valid? | |
# ------ | |
# | |
# Returns a boolean that specifies whether the object is in a valid or invalid | |
# state. | |
def test_valid? | |
assert model.respond_to?(:valid?), "The model should respond to valid?" | |
assert_boolean model.valid?, "valid?" | |
end | |
# new_record? | |
# ----------- | |
# | |
# Returns a boolean that specifies whether the object has been persisted yet. | |
# This is used when calculating the URL for an object. If the object is | |
# not persisted, a form for that object, for instance, will be POSTed to the | |
# collection. If it is persisted, a form for the object will put PUTed to the | |
# URL for the object. | |
def test_new_record? | |
assert model.respond_to?(:new_record?), "The model should respond to new_record?" | |
assert_boolean model.new_record?, "new_record?" | |
end | |
def test_destroyed? | |
assert model.respond_to?(:destroyed?), "The model should respond to destroyed?" | |
assert_boolean model.destroyed?, "destroyed?" | |
end | |
# errors | |
# ------ | |
# | |
# Returns an object that has :[] and :full_messages defined on it. See below | |
# for more details. | |
# Returns an Array of Strings that are the errors for the attribute in | |
# question. If localization is used, the Strings should be localized | |
# for the current locale. If no error is present, this method should | |
# return an empty Array. | |
def test_errors_aref | |
assert model.respond_to?(:errors), "The model should respond to errors" | |
assert model.errors[:hello].is_a?(Array), "errors#[] should return an Array" | |
end | |
# Returns an Array of all error messages for the object. Each message | |
# should contain information about the field, if applicable. | |
def test_errors_full_messages | |
assert model.respond_to?(:errors), "The model should respond to errors" | |
assert model.errors.full_messages.is_a?(Array), "errors#full_messages should return an Array" | |
end | |
private | |
def model | |
assert @model.respond_to?(:to_model), "The object should respond_to to_model" | |
@model.to_model | |
end | |
def assert_boolean(result, name) | |
assert result == true || result == false, "#{name} should be a boolean" | |
end | |
end | |
end | |
end |
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