[tests] refactor translation tests (#3866)

- Remove `sinon` dependency in favor of Jest native mocking
  - Unify test helper functions across translation test suites
- Rename `setupDOMEnvironment` to `createTranslationTestEnvironment` for
consistency
  - Simplify DOM setup by removing unnecessary Promise/async patterns
- Avoid potential port conflicts by using port 3001 for translator unit
tests
  - Improve test reliability and maintainability

CHANGELOG.md

@@ -27,6 +27,13 @@ Thanks to: @dathbe.
 - [tests] refactor: add `setupDOMEnvironment` helper function to eliminate repetitive JSDOM setup code (#3860)
 - [tests] replace `console` with `Log` in calendar `debug.js` to avoid exception in eslint config (#3846)
 - [tests] speed up e2e tests, cleanup and stabilize weather e2e tests, update snapshot url (#3847, #3848, #3861)
+- [tests] refactor translation tests (#3866)
+  - Remove `sinon` dependency in favor of Jest native mocking
+  - Unify test helper functions across translation test suites
+  - Rename `setupDOMEnvironment` to `createTranslationTestEnvironment` for consistency
+  - Simplify DOM setup by removing unnecessary Promise/async patterns
+  - Avoid potential port conflicts by using port 3001 for translator unit tests
+  - Improve test reliability and maintainability
 
 ### Updated
 

package-lock.json

@@ -52,7 +52,6 @@
 				"markdownlint-cli2": "^0.18.1",
 				"playwright": "^1.55.0",
 				"prettier": "^3.6.2",
-				"sinon": "^21.0.0",
 				"stylelint": "^16.23.1",
 				"stylelint-config-standard": "^39.0.0",
 				"stylelint-prettier": "^5.0.3"
@@ -2717,28 +2716,6 @@
 				"@sinonjs/commons": "^3.0.1"
 			}
 		},
-		"node_modules/@sinonjs/samsam": {
-			"version": "8.0.2",
-			"resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-8.0.2.tgz",
-			"integrity": "sha512-v46t/fwnhejRSFTGqbpn9u+LQ9xJDse10gNnPgAcxgdoCDMXj/G2asWAC/8Qs+BAZDicX+MNZouXT1A7c83kVw==",
-			"dev": true,
-			"license": "BSD-3-Clause",
-			"dependencies": {
-				"@sinonjs/commons": "^3.0.1",
-				"lodash.get": "^4.4.2",
-				"type-detect": "^4.1.0"
-			}
-		},
-		"node_modules/@sinonjs/samsam/node_modules/type-detect": {
-			"version": "4.1.0",
-			"resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.1.0.tgz",
-			"integrity": "sha512-Acylog8/luQ8L7il+geoSxhEkazvkslg7PSNKOX59mbB9cOveP5aq9h74Y7YU8yDpJwetzQQrfIwtf4Wp4LKcw==",
-			"dev": true,
-			"license": "MIT",
-			"engines": {
-				"node": ">=4"
-			}
-		},
 		"node_modules/@socket.io/component-emitter": {
 			"version": "3.1.2",
 			"resolved": "https://registry.npmjs.org/@socket.io/component-emitter/-/component-emitter-3.1.2.tgz",
@@ -9534,14 +9511,6 @@
 			"integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
 			"license": "MIT"
 		},
-		"node_modules/lodash.get": {
-			"version": "4.4.2",
-			"resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
-			"integrity": "sha512-z+Uw/vLuy6gQe8cfaFWD7p0wVv8fJl3mbzXh33RS+0oW2wvUqiRXiQ69gLWSLpgB5/6sU+r6BlQR0MBILadqTQ==",
-			"deprecated": "This package is deprecated. Use the optional chaining (?.) operator instead.",
-			"dev": true,
-			"license": "MIT"
-		},
 		"node_modules/lodash.merge": {
 			"version": "4.6.2",
 			"resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
@@ -12791,34 +12760,6 @@
 				"url": "https://github.com/sponsors/isaacs"
 			}
 		},
-		"node_modules/sinon": {
-			"version": "21.0.0",
-			"resolved": "https://registry.npmjs.org/sinon/-/sinon-21.0.0.tgz",
-			"integrity": "sha512-TOgRcwFPbfGtpqvZw+hyqJDvqfapr1qUlOizROIk4bBLjlsjlB00Pg6wMFXNtJRpu+eCZuVOaLatG7M8105kAw==",
-			"dev": true,
-			"license": "BSD-3-Clause",
-			"dependencies": {
-				"@sinonjs/commons": "^3.0.1",
-				"@sinonjs/fake-timers": "^13.0.5",
-				"@sinonjs/samsam": "^8.0.1",
-				"diff": "^7.0.0",
-				"supports-color": "^7.2.0"
-			},
-			"funding": {
-				"type": "opencollective",
-				"url": "https://opencollective.com/sinon"
-			}
-		},
-		"node_modules/sinon/node_modules/diff": {
-			"version": "7.0.0",
-			"resolved": "https://registry.npmjs.org/diff/-/diff-7.0.0.tgz",
-			"integrity": "sha512-PJWHUb1RFevKCwaFA9RlG5tCd+FO5iRh9A8HEtkmBH2Li03iJriB6m6JIN4rGz3K3JLawI7/veA1xzRKP6ISBw==",
-			"dev": true,
-			"license": "BSD-3-Clause",
-			"engines": {
-				"node": ">=0.3.1"
-			}
-		},
 		"node_modules/slash": {
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",

package.json

@@ -111,7 +111,6 @@
 		"markdownlint-cli2": "^0.18.1",
 		"playwright": "^1.55.0",
 		"prettier": "^3.6.2",
-		"sinon": "^21.0.0",
 		"stylelint": "^16.23.1",
 		"stylelint-config-standard": "^39.0.0",
 		"stylelint-prettier": "^5.0.3"

tests/e2e/translations_spec.js

@@ -3,22 +3,24 @@ const path = require("node:path");
 const helmet = require("helmet");
 const { JSDOM } = require("jsdom");
 const express = require("express");
-const sinon = require("sinon");
 const translations = require("../../translations/translations");
 
 /**
- * Helper function to setup DOM environment.
+ * Helper function to create a fresh Translator instance with DOM environment.
- * @returns {object} The JSDOM window object
+ * @returns {object} Object containing window and Translator
  */
-function setupDOMEnvironment () {
+function createTranslationTestEnvironment () {
-	const dom = new JSDOM("", { runScripts: "dangerously", resources: "usable" });
+	// Setup DOM environment with Translator
+	const translatorJs = fs.readFileSync(path.join(__dirname, "..", "..", "js", "translator.js"), "utf-8");
+	const dom = new JSDOM("", { url: "http://localhost:3000", runScripts: "outside-only" });
 
 	dom.window.Log = { log: jest.fn(), error: jest.fn() };
-	const translatorJs = fs.readFileSync(path.join(__dirname, "..", "..", "js", "translator.js"), "utf-8");
 	dom.window.translations = translations;
 	dom.window.eval(translatorJs);
 
-	return dom.window;
+	const window = dom.window;
+
+	return { window, Translator: window.Translator };
 }
 
 describe("translations", () => {
@@ -52,91 +54,76 @@ describe("translations", () => {
 		let dom;
 
 		beforeEach(() => {
-			// Create a new JSDOM instance for each test
+			// Create a new translation test environment for each test
-			const window = setupDOMEnvironment();
+			const env = createTranslationTestEnvironment();
-			dom = { window };
+			const window = env.window;
 
-			// Additional setup for loadTranslations tests
+			// Load class.js and module.js content directly for loadTranslations tests
-			dom.window.Translator = {};
-			dom.window.config = { language: "de" };
-
-			// Load class.js and module.js content directly
 			const classJs = fs.readFileSync(path.join(__dirname, "..", "..", "js", "class.js"), "utf-8");
 			const moduleJs = fs.readFileSync(path.join(__dirname, "..", "..", "js", "module.js"), "utf-8");
 
 			// Execute the scripts in the JSDOM context
-			dom.window.eval(classJs);
+			window.eval(classJs);
-			dom.window.eval(moduleJs);
+			window.eval(moduleJs);
+
+			// Additional setup for loadTranslations tests
+			window.config = { language: "de" };
+
+			dom = { window };
 		});
 
 		it("should load translation file", async () => {
-			await new Promise((resolve) => {
-				dom.window.onload = resolve;
-			});
-
 			const { Translator, Module, config } = dom.window;
 			config.language = "en";
-			Translator.load = sinon.stub().callsFake((_m, _f, _fb) => null);
+			Translator.load = jest.fn().mockImplementation((_m, _f, _fb) => null);
 
 			Module.register("name", { getTranslations: () => translations });
 			const MMM = Module.create("name");
 
 			await MMM.loadTranslations();
 
-			expect(Translator.load.args).toHaveLength(1);
+			expect(Translator.load.mock.calls).toHaveLength(1);
-			expect(Translator.load.calledWith(MMM, "translations/en.json", false)).toBe(true);
+			expect(Translator.load).toHaveBeenCalledWith(MMM, "translations/en.json", false);
 		});
 
 		it("should load translation + fallback file", async () => {
-			await new Promise((resolve) => {
-				dom.window.onload = resolve;
-			});
-
 			const { Translator, Module } = dom.window;
-			Translator.load = sinon.stub().callsFake((_m, _f, _fb) => null);
+			Translator.load = jest.fn().mockImplementation((_m, _f, _fb) => null);
 
 			Module.register("name", { getTranslations: () => translations });
 			const MMM = Module.create("name");
 
 			await MMM.loadTranslations();
 
-			expect(Translator.load.args).toHaveLength(2);
+			expect(Translator.load.mock.calls).toHaveLength(2);
-			expect(Translator.load.calledWith(MMM, "translations/de.json", false)).toBe(true);
+			expect(Translator.load).toHaveBeenCalledWith(MMM, "translations/de.json", false);
-			expect(Translator.load.calledWith(MMM, "translations/en.json", true)).toBe(true);
+			expect(Translator.load).toHaveBeenCalledWith(MMM, "translations/en.json", true);
 		});
 
 		it("should load translation fallback file", async () => {
-			await new Promise((resolve) => {
-				dom.window.onload = resolve;
-			});
-
 			const { Translator, Module, config } = dom.window;
 			config.language = "--";
-			Translator.load = sinon.stub().callsFake((_m, _f, _fb) => null);
+			Translator.load = jest.fn().mockImplementation((_m, _f, _fb) => null);
 
 			Module.register("name", { getTranslations: () => translations });
 			const MMM = Module.create("name");
 
 			await MMM.loadTranslations();
 
-			expect(Translator.load.args).toHaveLength(1);
+			expect(Translator.load.mock.calls).toHaveLength(1);
-			expect(Translator.load.calledWith(MMM, "translations/en.json", true)).toBe(true);
+			expect(Translator.load).toHaveBeenCalledWith(MMM, "translations/en.json", true);
 		});
 
 		it("should load no file", async () => {
-			await new Promise((resolve) => {
-				dom.window.onload = resolve;
-			});
-
 			const { Translator, Module } = dom.window;
-			Translator.load = sinon.stub();
+			Translator.load = jest.fn();
 
 			Module.register("name", {});
 			const MMM = Module.create("name");
 
 			await MMM.loadTranslations();
 
-			expect(Translator.load.callCount).toBe(0);
+			expect(Translator.load.mock.calls).toHaveLength(0);
 		});
 	});
 
@@ -150,13 +137,7 @@ describe("translations", () => {
 	describe("parsing language files through the Translator class", () => {
 		for (const language in translations) {
 			it(`should parse ${language}`, async () => {
-				const window = setupDOMEnvironment();
+				const { Translator } = createTranslationTestEnvironment();
-
-				await new Promise((resolve) => {
-					window.onload = resolve;
-				});
-
-				const { Translator } = window;
 				await Translator.load(mmm, translations[language], false);
 
 				expect(typeof Translator.translations[mmm.name]).toBe("object");
@@ -187,16 +168,10 @@ describe("translations", () => {
 		};
 
 		// Function to initialize JSDOM and load translations
-		const initializeTranslationDOM = (language) => {
+		const initializeTranslationDOM = async (language) => {
-			const window = setupDOMEnvironment();
+			const { Translator } = createTranslationTestEnvironment();
-
-			return new Promise((resolve) => {
-				window.onload = async () => {
-					const { Translator } = window;
 			await Translator.load(mmm, translations[language], false);
-					resolve(Translator.translations[mmm.name]);
+			return Translator.translations[mmm.name];
-				};
-			});
 		};
 
 		beforeAll(async () => {

tests/unit/classes/translator_spec.js

@@ -5,25 +5,22 @@ const { JSDOM } = require("jsdom");
 const express = require("express");
 
 /**
- * Helper function to setup DOM environment.
+ * Helper function to create a fresh Translator instance with DOM environment.
- * @param {string} scriptContent - The script content to evaluate
+ * @returns {object} Object containing window and Translator
- * @returns {Promise<object>} The JSDOM window object
  */
-async function setupDOMEnvironment (scriptContent) {
+function createTranslationTestEnvironment () {
-	const dom = new JSDOM("", { runScripts: "outside-only" });
+	const translatorJs = fs.readFileSync(path.join(__dirname, "..", "..", "..", "js", "translator.js"), "utf-8");
+	const dom = new JSDOM("", { url: "http://localhost:3001", runScripts: "outside-only" });
 
-	dom.window.eval(scriptContent);
 	dom.window.Log = { log: jest.fn(), error: jest.fn() };
+	dom.window.eval(translatorJs);
 
-	await new Promise((resolve) => dom.window.onload = resolve);
+	return { window: dom.window, Translator: dom.window.Translator };
-	return dom.window;
 }
 
 describe("Translator", () => {
 	let server;
 	const sockets = new Set();
-	const translatorJsPath = path.join(__dirname, "..", "..", "..", "js", "translator.js");
-	const translatorJsScriptContent = fs.readFileSync(translatorJsPath, "utf8");
 	const translationTestData = JSON.parse(fs.readFileSync(path.join(__dirname, "..", "..", "..", "tests", "mocks", "translation_test.json"), "utf8"));
 
 	beforeAll(() => {
@@ -35,7 +32,7 @@ describe("Translator", () => {
 		});
 		app.use("/translations", express.static(path.join(__dirname, "..", "..", "..", "tests", "mocks")));
 
-		server = app.listen(3000);
+		server = app.listen(3001);
 
 		server.on("connection", (socket) => {
 			sockets.add(socket);
@@ -96,8 +93,7 @@ describe("Translator", () => {
 		};
 
 		it("should return custom module translation", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			setTranslations(Translator);
 
 			let translation = Translator.translate({ name: "MMM-Module" }, "Hello");
@@ -108,8 +104,7 @@ describe("Translator", () => {
 		});
 
 		it("should return core translation", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			setTranslations(Translator);
 			let translation = Translator.translate({ name: "MMM-Module" }, "FOO");
 			expect(translation).toBe("Foo");
@@ -118,32 +113,28 @@ describe("Translator", () => {
 		});
 
 		it("should return custom module translation fallback", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			setTranslations(Translator);
 			const translation = Translator.translate({ name: "MMM-Module" }, "A key");
 			expect(translation).toBe("A translation");
 		});
 
 		it("should return core translation fallback", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			setTranslations(Translator);
 			const translation = Translator.translate({ name: "MMM-Module" }, "Fallback");
 			expect(translation).toBe("core fallback");
 		});
 
 		it("should return translation with placeholder for missing variables", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			setTranslations(Translator);
 			const translation = Translator.translate({ name: "MMM-Module" }, "Hello {username}");
 			expect(translation).toBe("Hallo {username}");
 		});
 
 		it("should return key if no translation was found", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			setTranslations(Translator);
 			const translation = Translator.translate({ name: "MMM-Module" }, "MISSING");
 			expect(translation).toBe("MISSING");
@@ -154,13 +145,12 @@ describe("Translator", () => {
 		const mmm = {
 			name: "TranslationTest",
 			file (file) {
-				return `http://localhost:3000/translations/${file}`;
+				return `http://localhost:3001/translations/${file}`;
 			}
 		};
 
 		it("should load translations", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			const file = "translation_test.json";
 
 			await Translator.load(mmm, file, false);
@@ -169,8 +159,7 @@ describe("Translator", () => {
 		});
 
 		it("should load translation fallbacks", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			const file = "translation_test.json";
 
 			await Translator.load(mmm, file, true);
@@ -179,8 +168,7 @@ describe("Translator", () => {
 		});
 
 		it("should not load translations, if module fallback exists", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { Translator } = createTranslationTestEnvironment();
-			const { Translator } = window;
 			const file = "translation_test.json";
 
 			Translator.translationsFallback[mmm.name] = {
@@ -197,29 +185,23 @@ describe("Translator", () => {
 
 	describe("loadCoreTranslations", () => {
 		it("should load core translations and fallback", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { window, Translator } = createTranslationTestEnvironment();
-			window.translations = { en: "http://localhost:3000/translations/translation_test.json" };
+			window.translations = { en: "http://localhost:3001/translations/translation_test.json" };
-			const { Translator } = window;
 			await Translator.loadCoreTranslations("en");
 
 			const en = translationTestData;
 
-			await new Promise((resolve) => setTimeout(resolve, 500));
-
 			expect(Translator.coreTranslations).toEqual(en);
 			expect(Translator.coreTranslationsFallback).toEqual(en);
 		});
 
 		it("should load core fallback if language cannot be found", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { window, Translator } = createTranslationTestEnvironment();
-			window.translations = { en: "http://localhost:3000/translations/translation_test.json" };
+			window.translations = { en: "http://localhost:3001/translations/translation_test.json" };
-			const { Translator } = window;
 			await Translator.loadCoreTranslations("MISSINGLANG");
 
 			const en = translationTestData;
 
-			await new Promise((resolve) => setTimeout(resolve, 500));
-
 			expect(Translator.coreTranslations).toEqual({});
 			expect(Translator.coreTranslationsFallback).toEqual(en);
 		});
@@ -227,26 +209,20 @@ describe("Translator", () => {
 
 	describe("loadCoreTranslationsFallback", () => {
 		it("should load core translations fallback", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { window, Translator } = createTranslationTestEnvironment();
-			window.translations = { en: "http://localhost:3000/translations/translation_test.json" };
+			window.translations = { en: "http://localhost:3001/translations/translation_test.json" };
-			const { Translator } = window;
 			await Translator.loadCoreTranslationsFallback();
 
 			const en = translationTestData;
 
-			await new Promise((resolve) => setTimeout(resolve, 500));
-
 			expect(Translator.coreTranslationsFallback).toEqual(en);
 		});
 
 		it("should load core fallback if language cannot be found", async () => {
-			const window = await setupDOMEnvironment(translatorJsScriptContent);
+			const { window, Translator } = createTranslationTestEnvironment();
 			window.translations = {};
-			const { Translator } = window;
 			await Translator.loadCoreTranslations();
 
-			await new Promise((resolve) => setTimeout(resolve, 500));
-
 			expect(Translator.coreTranslationsFallback).toEqual({});
 		});
 	});