Added Alexa Music

custom_components/maintenance_supporter/frontend-src/__tests__/date-format.test.ts

@@ -0,0 +1,58 @@
+/** Unit tests for formatDate/formatDateTime honouring HA's per-user profile
+ *  date/time format (issue #97 — dates followed only the UI language, so an
+ *  English UI always showed mm/dd/yyyy even with dd/mm/yyyy configured). */
+
+import { expect } from "@open-wc/testing";
+import { formatDate, formatDateTime, setDateTimePrefs } from "../styles";
+
+const reset = () => setDateTimePrefs({ date_format: undefined, time_format: undefined });
+
+describe("formatDate with HA profile date_format (#97)", () => {
+  afterEach(reset);
+
+  it("DMY renders dd/mm/yyyy regardless of language", () => {
+    setDateTimePrefs({ date_format: "DMY" });
+    expect(formatDate("2026-08-10", "en")).to.equal("10/08/2026");
+    expect(formatDate("2026-08-10", "de")).to.equal("10/08/2026");
+  });
+
+  it("MDY renders mm/dd/yyyy regardless of language", () => {
+    setDateTimePrefs({ date_format: "MDY" });
+    expect(formatDate("2026-08-10", "de")).to.equal("08/10/2026");
+  });
+
+  it("YMD renders yyyy-mm-dd", () => {
+    setDateTimePrefs({ date_format: "YMD" });
+    expect(formatDate("2026-08-10", "en")).to.equal("2026-08-10");
+  });
+
+  it('"language" / unset keeps the language-derived format (backwards compatible)', () => {
+    setDateTimePrefs({ date_format: "language" });
+    expect(formatDate("2026-08-10", "en")).to.equal("08/10/2026"); // en → en-US
+    expect(formatDate("2026-08-10", "de")).to.equal("10.08.2026"); // de → de-DE
+    reset();
+    expect(formatDate("2026-08-10", "de")).to.equal("10.08.2026");
+  });
+
+  it("null/invalid input unchanged by prefs", () => {
+    setDateTimePrefs({ date_format: "DMY" });
+    expect(formatDate(null, "en")).to.equal("—");
+  });
+});
+
+describe("formatDateTime with HA profile time_format (#97)", () => {
+  afterEach(reset);
+
+  it("24 forces 24h clock even for en", () => {
+    setDateTimePrefs({ date_format: "DMY", time_format: "24" });
+    expect(formatDateTime("2026-08-10T14:30:00", "en")).to.equal("10/08/2026 14:30");
+  });
+
+  it("12 forces a 12h clock even for de", () => {
+    setDateTimePrefs({ date_format: "DMY", time_format: "12" });
+    const out = formatDateTime("2026-08-10T14:30:00", "de");
+    expect(out.startsWith("10/08/2026 ")).to.be.true;
+    expect(out).to.match(/2:30/);
+    expect(out.toLowerCase()).to.match(/pm|nachm/);
+  });
+});