Function runBaseTest

__tests__/base.js:55–3923

(
	name,
	autoFreeze,
	useStrictShallowCopy,
	useListener,
	useArrayMethods = false
)

class Foo {}

function runBaseTest(
	name,
	autoFreeze,
	useStrictShallowCopy,
	useListener,
	useArrayMethods = false
) {
	const listener = useListener ? function () {} : undefined

	const {produce, produceWithPatches} = createPatchedImmer({
		autoFreeze,
		useStrictShallowCopy
	})

	// When `useListener` is true, append a function to the arguments of every
	// uncurried `produce` call in every test. This makes tests easier to read.
	function createPatchedImmer(options) {
		const immer = new Immer(options)

		const {produce} = immer
		immer.produce = function (...args) {
			return typeof args[1] === "function" && args.length < 3
				? produce(...args, listener)
				: produce(...args)
		}

		return immer
	}

	describe(`base functionality - ${name}`, () => {
		let baseState
		let origBaseState

		beforeEach(() => {
			origBaseState = baseState = createBaseState()

			// Allow running our tests with and without the array method plugin
			if (useArrayMethods) {
				enableArrayMethods()
			} else {
				clearPlugin(PluginArrayMethods)
			}
		})

		it("returns the original state when no changes are made", () => {
			const nextState = produce(baseState, s => {
				expect(s.aProp).toBe("hi")
				expect(s.anObject.nested).toMatchObject({yummie: true})
			})
			expect(nextState).toBe(baseState)
		})

		it("does structural sharing", () => {
			const random = Math.random()
			const nextState = produce(baseState, s => {
				s.aProp = random
			})
			expect(nextState).not.toBe(baseState)