deferUntilFrame.test.js
No OneTemporary
Actions

Size

723 B

Referenced Files

None

Subscribers

None

deferUntilFrame.test.js
View Options

	const deferUntilFrame = require( '../../resources/skins.vector.js/deferUntilFrame.js' );

	describe( 'deferUntilFrame.js', () => {
	let /** @type {jest.SpyInstance} */ spy;

	beforeEach( () => {
	spy = jest.spyOn( window, 'requestAnimationFrame' ).mockImplementation( ( cb ) => {
	setTimeout( () => {
	cb( 1 );
	} );

	return 1;
	} );
	} );

	afterEach( () => {
	spy.mockRestore();
	} );

	it( 'does not fire rAF if `0` is passed', ( done ) => {
	deferUntilFrame( () => {
	expect( spy ).toHaveBeenCalledTimes( 0 );
	done();
	}, 0 );
	} );

	it( 'fires rAF the specified number of times', ( done ) => {
	deferUntilFrame( () => {
	expect( spy ).toHaveBeenCalledTimes( 3 );
	done();
	}, 3 );
	} );
	} );