svelte/test/runtime/samples/each-block-keyed-component-action/_config.js

export default {
	test({ assert, component, raf }) {
		assert.equal(component.count, 0);

		component.arr = ["2"];

		assert.equal(component.count, 1);

		component.arr = ["1", "2"];

		assert.equal(component.count, 2);

		component.arr = ["2", "1"];

		assert.equal(component.count, 2);

		component.arr = [];

		assert.equal(component.count, 0);
	},
};