hamjest/test/node/matchers/typedErrorSpec.js

A library of composable matchers for defining meaningful and readable assertions in JavaScript.

'use strict';

const _ = require('lodash');
const __ = require('../../..');

describe('typedError', () => {
	it('should match if type and message string match', () => {
		const sut = __.typedError(Error, 'Just a message');

		__.assertThat(sut, __.matches(new Error('Just a message')));
	});

	it('should match if type and message matcher match', () => {
		const sut = __.typedError(Error, __.containsString('Just'));

		__.assertThat(sut, __.matches(new Error('Just another message')));
	});

	_.forEach([
		[undefined, 'was undefined'],
		[null, 'was null'],
		[new Error('Unexpected message'), 'message was "Unexpected message"'],
		[{message: 'Very expected'}, 'type was Object'],
		[{message: 'Unexpected message'}, 'type was Object, message was "Unexpected message"'],
	], (args) => {
		const error = args[0];
		const expectedDescription = args[1];
		it('should not match if type or message do not match: ' + error, () => {
			const sut = __.typedError(Error, __.containsString('Very expected'));

			__.assertThat(sut, __.failsToMatch(error, expectedDescription));
		});
	});

	describe('description', () => {
		it('should contain expected type and message', () => {
			const sut = __.typedError(Error, __.containsString('Very expected'));

			__.assertThat(sut, __.hasDescription('an error of type Error with message a string containing "Very expected"'));
		});
	});
});