svelte/test/runtime/samples/transition-js-if-block-intro-outro/_config.js

export default {
	test ( assert, component, target, window, raf ) {
		component.set({ visible: true });
		let div = target.querySelector( 'div' );
		assert.equal( div.foo, 0 );

		raf.tick( 200 );
		assert.equal( div.foo, 0.5 );

		raf.tick( 400 );
		assert.equal( div.foo, 1 );

		raf.tick( 500 );
		assert.equal( div.foo, 1 );

		component.set({ visible: false });
		raf.tick( 600 );
		assert.equal( div.foo, 1 );
		assert.equal( div.bar, 0.75 );

		raf.tick( 900 );
		assert.equal( div.foo, 1 );
		assert.equal( div.bar, 0 );

		// test outro before intro complete
		raf.tick( 1000 );
		component.set({ visible: true });
		div = target.querySelector( 'div' );

		raf.tick( 1200 );
		assert.equal( div.foo, 0.5 );

		component.set({ visible: false });
		raf.tick( 1300 );
		assert.equal( div.foo, 0.75 );
		assert.equal( div.bar, 0.75 );

		raf.tick( 1400 );
		assert.equal( div.foo, 1 );
		assert.equal( div.bar, 0.5 );

		raf.tick( 2000 );

		component.destroy();
	}
};