Absorb the matrix-react-sdk repository (#28192)

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__mocks__/FontManager.js

@@ -0,0 +1,6 @@
+// Stub out FontManager for tests as it doesn't validate anything we don't already know given
+// our fixed test environment and it requires the installation of node-canvas.
+
+module.exports = {
+    fixupColorFonts: () => Promise.resolve(),
+};

__mocks__/empty.js

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+// Yes, this is empty.
+module.exports = {};

__mocks__/imageMock.js

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+module.exports = "image-file-stub";

__mocks__/languages.json

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+{
+    "en": "en_EN.json",
+    "en-us": "en_US.json"
+}

__mocks__/maplibre-gl.js

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+/*
+Copyright 2024 New Vector Ltd.
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+Please see LICENSE files in the repository root for full details.
+*/
+
+const EventEmitter = require("events");
+const { LngLat, NavigationControl, LngLatBounds } = require("maplibre-gl");
+
+class MockMap extends EventEmitter {
+    addControl = jest.fn();
+    removeControl = jest.fn();
+    zoomIn = jest.fn();
+    zoomOut = jest.fn();
+    setCenter = jest.fn();
+    setStyle = jest.fn();
+    fitBounds = jest.fn();
+}
+const MockMapInstance = new MockMap();
+
+class MockAttributionControl {}
+class MockGeolocateControl extends EventEmitter {
+    trigger = jest.fn();
+}
+const MockGeolocateInstance = new MockGeolocateControl();
+const MockMarker = {};
+MockMarker.setLngLat = jest.fn().mockReturnValue(MockMarker);
+MockMarker.addTo = jest.fn().mockReturnValue(MockMarker);
+MockMarker.remove = jest.fn().mockReturnValue(MockMarker);
+module.exports = {
+    Map: jest.fn().mockReturnValue(MockMapInstance),
+    GeolocateControl: jest.fn().mockReturnValue(MockGeolocateInstance),
+    Marker: jest.fn().mockReturnValue(MockMarker),
+    LngLat,
+    LngLatBounds,
+    NavigationControl,
+    AttributionControl: MockAttributionControl,
+};

__mocks__/svg.js

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+export const Icon = "div";
+export default "image-file-stub";

__mocks__/workerFactoryMock.js

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+/*
+Copyright 2024 New Vector Ltd.
+Copyright 2023 The Matrix.org Foundation C.I.C.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+Please see LICENSE files in the repository root for full details.
+*/
+
+export default function workerFactory(options) {
+    return jest.fn;
+}