initial commit taken from gitlab.lrz.de

node_modules/react-native/Libraries/Utilities/__mocks__/BackHandler.js

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+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+'use strict';
+
+const _backPressSubscriptions = new Set();
+
+const BackHandler = {
+  exitApp: jest.fn(),
+
+  addEventListener: function (
+    eventName: BackPressEventName,
+    handler: Function
+  ): {remove: () => void} {
+    _backPressSubscriptions.add(handler);
+    return {
+      remove: () => BackHandler.removeEventListener(eventName, handler),
+    };
+  },
+
+  removeEventListener: function(
+    eventName: BackPressEventName,
+    handler: Function
+  ): void {
+    _backPressSubscriptions.delete(handler);
+  },
+
+
+  mockPressBack: function() {
+    let invokeDefault = true;
+    const subscriptions = [..._backPressSubscriptions].reverse();
+    for (let i = 0; i < subscriptions.length; ++i) {
+      if (subscriptions[i]()) {
+        invokeDefault = false;
+        break;
+      }
+    }
+
+    if (invokeDefault) {
+      BackHandler.exitApp();
+    }
+  },
+};
+
+module.exports = BackHandler;

node_modules/react-native/Libraries/Utilities/__mocks__/PixelRatio.js

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+/**
+ * Copyright (c) 2004-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const PixelRatio = {
+  get: jest.fn().mockReturnValue(2),
+  getFontScale: jest.fn(() => PixelRatio.get()),
+  getPixelSizeForLayoutSize: jest.fn(layoutSize => Math.round(layoutSize * PixelRatio.get())),
+  roundToNearestPixel: jest.fn(layoutSize => {
+    const ratio = PixelRatio.get();
+    return Math.round(layoutSize * ratio) / ratio;
+  }),
+  startDetecting: jest.fn(),
+};
+
+module.exports = PixelRatio;