def test_set_preference_value_MatrixPreferenceDataModel():
#Add
model = MatrixPreferenceDataModel(movies)
model.set_preference('Maria Gabriela', 'Superman Returns', 2.0)
assert_equals(2.0, model.preference_value('Maria Gabriela', 'Superman Returns'))
#Edit
model = MatrixPreferenceDataModel(movies)
model.set_preference('Marcel Caraciolo', 'Superman Returns', 1.0)
assert_equals(1.0, model.preference_value('Marcel Caraciolo', 'Superman Returns'))
#invalid
assert_raises(UserNotFoundError, model.set_preference, 'Carlos', 'Superman Returns', 2.0)
def test_remove_preference_value_MatrixPreferenceDataModel():
model = MatrixPreferenceDataModel(movies)
model.remove_preference('Maria Gabriela', 'Superman Returns')
assert_array_equal(np.nan, model.preference_value('Maria Gabriela', 'Superman Returns'))
assert_raises(ItemNotFoundError, model.remove_preference, 'Marcel Caraciolo', 'Indiana Jones')
def test_preference_value__invalid_MatrixPreferenceDataModel():
model = MatrixPreferenceDataModel(movies)
assert_raises(UserNotFoundError, model.preference_value, 'Flavia', 'Superman Returns')
assert_raises(ItemNotFoundError, model.preference_value, 'Marcel Caraciolo', 'Back to the future')
assert_array_equal(np.nan, model.preference_value('Maria Gabriela', 'The Night Listener'))
def test_preference_value_MatrixPreferenceDataModel():
model = MatrixPreferenceDataModel(movies)
assert_equals(3.5, model.preference_value('Marcel Caraciolo', 'Superman Returns'))