default.test() — svelte Function Reference

Architecture documentation for the default.test() function in _config.js from the svelte codebase.

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BuildSystem→ MessageProcessor→ default.test() — svelte Function Reference

Dependency Diagram

graph TD
  c4b5deea_d51d_0962_7353_ed305df548f8["default.test()"]
  a59dad56_0813_8d43_d2aa_858957ae9cd3["_config.js"]
  c4b5deea_d51d_0962_7353_ed305df548f8 -->|defined in| a59dad56_0813_8d43_d2aa_858957ae9cd3
  style c4b5deea_d51d_0962_7353_ed305df548f8 fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

packages/svelte/tests/runtime-legacy/samples/binding-store-deep/_config.js lines 15–58

	test({ assert, component, target, window }) {
		const input = target.querySelector('input');
		ok(input);

		assert.equal(input.value, 'world');

		const event = new window.Event('input');

		/** @type {string[]} */
		const names = [];

		// @ts-ignore
		const unsubscribe = component.user.subscribe((user) => {
			if (!names.includes(user.name)) {
				names.push(user.name);
			}
		});

		input.value = 'everybody';
		input.dispatchEvent(event);
		flushSync();

		assert.htmlEqual(
			target.innerHTML,
			`
			<input>
			<p>hello everybody</p>
		`
		);

		component.user.set({ name: 'goodbye' });
		flushSync();
		assert.equal(input.value, 'goodbye');
		assert.htmlEqual(
			target.innerHTML,
			`
			<input>
			<p>hello goodbye</p>
		`
		);

		assert.deepEqual(names, ['world', 'everybody', 'goodbye']);
		unsubscribe();
	}