mock React.createContext

tests/__mocks__/react.js

@@ -0,0 +1,11 @@
+const React = require.requireActual('react');
+
+if (!React.createContext) {
+  React.createContext = () => {
+    const Provider = ({ children }) => children;
+    const Consumer = ({ children }) => children();
+    return { Provider, Consumer };
+  };
+}
+
+module.exports = React;