Stop using the js-sdk's compare function (#12782)

* Stop using the js-sdk's compare function

The file is supposed to be a js-sdk internal module so we shouldn't
have been using it, and now it uses the native collator, it's completely
trivial. It was also causing Intl.Collator to be accessed at the module
scope which risked it beating the modernizr check.

* add test

* Fix tests

Move the restoreAllMocks to prevent mock leakage and also add
some custom themes to test the ordering of those.

* Move spy to the right place

* Add ANOTHER test

* Add test for integration manager ordering

test/integrations/IntegrationManagers-test.ts

@@ -0,0 +1,70 @@
+/*
+Copyright 2024 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { MatrixClient, MatrixEvent } from "matrix-js-sdk/src/matrix";
+import { mocked } from "jest-mock";
+
+import { IntegrationManagers } from "../../src/integrations/IntegrationManagers";
+import { stubClient } from "../test-utils";
+
+describe("IntegrationManagers", () => {
+    let client: MatrixClient;
+    let intMgrs: IntegrationManagers;
+
+    beforeEach(() => {
+        client = stubClient();
+        mocked(client).getAccountData.mockReturnValue({
+            getContent: jest.fn().mockReturnValue({
+                foo: {
+                    id: "foo",
+                    content: {
+                        type: "m.integration_manager",
+                        url: "http://foo/ui",
+                        data: {
+                            api_url: "http://foo/api",
+                        },
+                    },
+                },
+                bar: {
+                    id: "bar",
+                    content: {
+                        type: "m.integration_manager",
+                        url: "http://bar/ui",
+                        data: {
+                            api_url: "http://bar/api",
+                        },
+                    },
+                },
+            }),
+        } as unknown as MatrixEvent);
+
+        intMgrs = new IntegrationManagers();
+        intMgrs.startWatching();
+    });
+
+    afterEach(() => {
+        intMgrs.stopWatching();
+    });
+
+    describe("getOrderedManagers", () => {
+        it("should return integration managers in alphabetical order", () => {
+            const orderedManagers = intMgrs.getOrderedManagers();
+
+            expect(orderedManagers[0].id).toBe("bar");
+            expect(orderedManagers[1].id).toBe("foo");
+        });
+    });
+});