Fix all tests and replace enzyme with @testing-library/react

packages/app/shell/TestContextProvider.tsx

@@ -0,0 +1,18 @@
+import React from 'react';
+import { createMemoryHistory } from 'history';
+import storeFactory from 'app/storeFactory';
+
+import ContextProvider from './ContextProvider';
+
+type ContextProps = React.ComponentProps<typeof ContextProvider>;
+
+function TestContextProvider(
+  props: Partial<ContextProps> & { children: ContextProps['children'] },
+) {
+  const store = React.useMemo(storeFactory, []);
+  const history = React.useMemo(createMemoryHistory, []);
+
+  return <ContextProvider store={store} history={history} {...props} />;
+}
+
+export default TestContextProvider;

packages/app/shell/index.ts

@@ -1 +0,0 @@
-export { default as ContextProvider } from './ContextProvider';

packages/app/shell/index.tsx

@@ -0,0 +1,2 @@
+export { default as ContextProvider } from './ContextProvider';
+export { default as TestContextProvider } from './TestContextProvider';