works-on-my-machine/tests/expect.test.ts

import assert from 'assert'
import { describe, test, expect } from '../src/testCaseUtils'

describe('Equality', () => {
	test('Equality (number)', () => {
		assert.doesNotThrow(() => expect(1).toEqual(1))
	})

	test('Equality (string)', () => {
		assert.doesNotThrow(() => expect('expectations').toEqual('expectations'))
	})

	test('Equality (boolean)', () => {
		assert.doesNotThrow(() => expect(true).toEqual(true))
	})

	test('Equality (failed - number)', () => {
		assert.throws(() => expect(1).toEqual(2))
	})

	test('Equality (failed - string)', () => {
		assert.throws(() => expect('expectation').toEqual('something else'))
	})

	test('Equality (failed - boolean)', () => {
		assert.throws(() => expect(true).toEqual(false))
	})
})

describe('Identity', () => {
	test('Identity comparison (number)', () => {
		assert.doesNotThrow(() => expect(1).toBe(1))
	})

	test('Identity comparison (boolean)', () => {
		assert.doesNotThrow(() => expect(true).toBe(true))
	})

	test('Identity comparison (string)', () => {
		assert.doesNotThrow(() => expect('identity').toBe('identity'))
	})

	test('Identity comparison (failed - number)', () => {
		assert.throws(() => expect(1).toEqual(2))
	})

	test('Identity comparison (failed - boolean)', () => {
		assert.throws(() => expect(false).toBe(true))
	})

	test('Identity comparison (failed - string)', () => {
		assert.throws(() => expect('yes').toBe('no'))
	})

	test('Equality negation', () => {
		assert.doesNotThrow(() => expect('yes').not.toEqual('no'))
	})
})

describe('Exception expectation', () => {
	test('Expects error', () => {
		const err = new Error('err')
		expect(() => {
			throw err
		}).toThrow()
	})

	test('Expects no error', () => {
		expect(() => {}).not.toThrow()
	})
})

test('Identity negation', () => {
	assert.doesNotThrow(() => expect('yes').not.toBe('no'))
})

test('Identity negation (fail)', () => {
	assert.throws(() => expect('yes').not.toBe('yes'))
})