Fix Firefox desktop OIDC callback (#1044)

src/backend/utils/oidc-desktop-callback.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it } from "vitest";
+import {
+  getDesktopOidcCallbackUrl,
+  isOidcTokenCallback,
+} from "./oidc-desktop-callback";
+
+describe("getDesktopOidcCallbackUrl", () => {
+  it("uses localhost so browsers do not upgrade the loopback callback", () => {
+    expect(getDesktopOidcCallbackUrl("17850")).toBe(
+      "http://localhost:17850/oidc-callback",
+    );
+  });
+
+  it.each(["", "0", "65536", "17850/path", ["17850"]])(
+    "rejects invalid callback port %j",
+    (port) => {
+      expect(getDesktopOidcCallbackUrl(port)).toBeNull();
+    },
+  );
+});
+
+describe("isOidcTokenCallback", () => {
+  it.each([
+    "http://localhost:17850/oidc-callback",
+    "http://127.0.0.1:17850/oidc-callback",
+    "termix-mobile://oidc-callback",
+  ])("recognizes app callback %s", (url) => {
+    expect(isOidcTokenCallback(url)).toBe(true);
+  });
+
+  it.each([
+    "https://localhost:17850/oidc-callback",
+    "http://example.com:17850/oidc-callback",
+    "http://localhost:17850/other",
+  ])("rejects non-app callback %s", (url) => {
+    expect(isOidcTokenCallback(url)).toBe(false);
+  });
+});