Add tests for CustomizationContext

src/testUtils/cutomizationContextMock.js

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2019-2022 CZ.NIC z.s.p.o. (https://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from "react";
+
+window.CustomizationContext = React.createContext();
+
+const deviceDetails = {};
+const isCustomized = jest.fn();
+
+function CustomizationContextMock({ children }) {
+    return (
+        <CustomizationContext.Provider value={(deviceDetails, isCustomized)}>
+            {children}
+        </CustomizationContext.Provider>
+    );
+}
+
+export { CustomizationContextMock };