Basic Dev Mode tests (#70)

* simple dev mode smoke test

* update README: provide a valid example schema

README.md

@@ -144,6 +144,7 @@ const initialize = async () => {
         properties: {
           id: {
             type: 'string',
+            maxLength: 100,
           },
           name: {
             type: 'string',

tests/devMode.test.tsx

@@ -0,0 +1,35 @@
+import React from 'react';
+import { setup, teardown, MyDatabase } from './helpers';
+
+import { renderHook } from '@testing-library/react-hooks';
+import { addRxPlugin } from 'rxdb';
+import { RxDBDevModePlugin } from 'rxdb/plugins/dev-mode';
+import Provider from '../src/Provider';
+import { characters } from './mockData';
+import useRxDB from '../src/useRxDB';
+
+addRxPlugin(RxDBDevModePlugin);
+
+describe('when RxDBDevModePlugin', () => {
+	let db: MyDatabase;
+
+	beforeAll(async done => {
+		db = await setup(characters, 'characters');
+		done();
+	});
+
+	afterAll(async done => {
+		await teardown(db);
+		done();
+	});
+
+	describe('useRxDB', () => {
+		it('should return the db instsance', () => {
+			const wrapper = ({ children }) => (
+				<Provider db={db}>{children}</Provider>
+			);
+			const { result } = renderHook(() => useRxDB(), { wrapper });
+			expect(result.current).toBe(db);
+		});
+	});
+});

tests/helpers.tsx

@@ -51,9 +51,11 @@ export const setupCollection = async (
 				properties: {
 					id: {
 						type: 'string',
+						maxLength: 100,
 					},
 					name: {
 						type: 'string',
+						maxLength: 100,
 					},
 					affiliation: {
 						type: 'string',