basic.py 文件源码

def test_build_error_handler(self):
        app = flask.Flask(__name__)

        # Test base case, a URL which results in a BuildError.
        with app.test_request_context():
            self.assertRaises(BuildError, flask.url_for, 'spam')

        # Verify the error is re-raised if not the current exception.
        try:
            with app.test_request_context():
                flask.url_for('spam')
        except BuildError as err:
            error = err
        try:
            raise RuntimeError('Test case where BuildError is not current.')
        except RuntimeError:
            self.assertRaises(BuildError, app.handle_url_build_error, error, 'spam', {})

        # Test a custom handler.
        def handler(error, endpoint, values):
            # Just a test.
            return '/test_handler/'
        app.url_build_error_handlers.append(handler)
        with app.test_request_context():
            self.assert_equal(flask.url_for('spam'), '/test_handler/')