nextState.test.js
No OneTemporary
Actions

Size

1 KB

Referenced Files

None

Subscribers

None

nextState.test.js
View Options

	import nextState from '../../../src/reducers/nextState';

	QUnit.module( 'reducers/nextState' );

	QUnit.test( 'with scalar values', ( assert ) => {
	const tests = [
	{
	before: {},
	updates: {},
	after: {}
	},
	{
	before: { unchanged: true, changed: false },
	updates: { new: true, changed: true },
	after: { unchanged: true, changed: true, new: true }
	},
	{
	before: { a: { b: { unchanged: true, changed: false } } },
	updates: { a: { b: { new: true, changed: true } } },
	after: { a: { b: { unchanged: true, changed: true, new: true } } }
	}
	];
	for ( const i in tests ) {
	const test = tests[ i ];
	assert.deepEqual(
	nextState( test.before, test.updates ),
	test.after,
	'Test case #' + i
	);
	}
	} );

	QUnit.test( 'original state object should not change', ( assert ) => {
	const state = {},
	after = nextState( state, { changed: true } );
	assert.deepEqual(
	state,
	{},
	'original state is unchanged'
	);
	assert.deepEqual(
	after,
	{ changed: true },
	'new state is different'
	);
	} );

	QUnit.test( 'Element instances should not be cloned', ( assert ) => {
	const element = document.createElement( 'a' ),
	newElement = document.createElement( 'b' ),
	state = { element },
	after = nextState( state, { element: newElement } );
	assert.strictEqual(
	state.element, element,
	'original state is unchanged'
	);
	assert.strictEqual(
	after.element, newElement,
	'Element instance was not cloned'
	);
	} );