build: add 'update' option for Vitest runner and corresponding tests #32262

Original file line number	Diff line number	Diff line change
Expand Up		@@ -242,6 +242,7 @@ export type UnitTestBuilderOptions = {
		setupFiles?: string[];
		tsConfig?: string;
		ui?: boolean;
	update?: boolean;
		watch?: boolean;
		};

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Original file line number	Diff line number	Diff line change
Expand Up		@@ -54,12 +54,16 @@ export async function normalizeOptions(
		const buildTargetSpecifier = options.buildTarget ?? `::development`;
		const buildTarget = targetFromTargetString(buildTargetSpecifier, projectName, 'build');

	const { runner, browsers, progress, filter, browserViewport, ui, runnerConfig } = options;
	const { runner, browsers, progress, filter, browserViewport, ui, runnerConfig, update } = options;

		if (ui && runner !== Runner.Vitest) {
		throw new Error('The "ui" option is only available for the "vitest" runner.');
		}

	if (update && runner !== Runner.Vitest) {
	throw new Error('The "update" option is only available for the "vitest" runner.');
	}

		const [width, height] = browserViewport?.split('x').map(Number) ?? [];

		let tsConfig = options.tsConfig;
Expand Down Expand Up		@@ -132,6 +136,7 @@ export async function normalizeOptions(
		? true
		: path.resolve(workspaceRoot, runnerConfig)
		: runnerConfig,
	update: update ?? false,
		};
		}

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Original file line number	Diff line number	Diff line change
Expand Up		@@ -238,6 +238,7 @@ export class VitestExecutor implements TestExecutor {
		watch,
		...(typeof ui === 'boolean' ? { ui } : {}),
		...debugOptions,
	update: this.options.update,
		},
		{
		// Note `.vitest` is auto appended to the path.
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Original file line number	Diff line number	Diff line change
Expand Up		@@ -269,6 +269,11 @@
		"description": "Dumps build output files to the `.angular/cache` directory for debugging purposes.",
		"default": false,
		"visible": false
	},
	"update": {
	"type": "boolean",
	"description": "Updates test snapshots to match the current test output. This option is only available for the Vitest runner.",
	"default": false
		}
		},
		"additionalProperties": false,
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Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,55 @@
	/**
	* @license
	* Copyright Google LLC All Rights Reserved.
	*
	* Use of this source code is governed by an MIT-style license that can be
	* found in the LICENSE file at https://angular.dev/license
	*/

	import { execute } from '../../index';
	import {
	BASE_OPTIONS,
	describeBuilder,
	UNIT_TEST_BUILDER_INFO,
	setupApplicationTarget,
	} from '../setup';

	describeBuilder(execute, UNIT_TEST_BUILDER_INFO, (harness) => {
	describe('Option: "update"', () => {
	beforeEach(() => {
	setupApplicationTarget(harness);
	});

	it('should work with update flag enabled', async () => {
	harness.useTarget('test', {
	...BASE_OPTIONS,
	update: true,
	});

	const { result } = await harness.executeOnce();

	expect(result?.success).toBeTrue();
	});

	it('should work with update flag disabled', async () => {
	harness.useTarget('test', {
	...BASE_OPTIONS,
	update: false,
	});

	const { result } = await harness.executeOnce();

	expect(result?.success).toBeTrue();
	});

	it('should work without update flag (default)', async () => {
	harness.useTarget('test', {
	...BASE_OPTIONS,
	});

	const { result } = await harness.executeOnce();

	expect(result?.success).toBeTrue();
	});
	});
	});

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