init commit,

002_source/ionic_mobile/src/setupTests.ts

@@ -0,0 +1,17 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+
+import '@testing-library/jest-dom/extend-expect';
+
+// Mock matchmedia
+window.matchMedia =
+  window.matchMedia ||
+  function () {
+    return {
+      matches: false,
+      addListener: function () {},
+      removeListener: function () {},
+    };
+  };