Add tests.

The tests confirm bad requests return failures, and that a good request should return success.

src/__test__/index.test.js

@@ -0,0 +1,67 @@
+'use strict';
+
+const server = require('../index')
+
+jest.mock('../callSitespeed')
+
+beforeAll((done) => {
+  server.events.on('start', () => {
+      done();
+  });
+});
+
+afterAll((done) => {
+  server.events.on('stop', () => {
+      done();
+  });
+  server.stop();
+});
+
+test('GET request returns failure', async () => {
+  const options = {
+    method: 'GET',
+    url: '/'
+  };
+  const data = await server.inject(options);
+  expect(data.statusCode).toBe(404);
+});
+
+test('POST request with no payload returns failure', async () => {
+  const options = {
+    method: 'POST',
+    url: '/',
+    payload: {
+      url: null
+    }
+  };
+  const data = await server.inject(options);
+  expect(data.statusCode).toBe(400);
+  expect(data.payload).toBe('Bad Request: no URL received');
+});
+
+test('POST request with incorrect URL returns failure', async () => {
+  const options = {
+    method: 'POST',
+    url: '/',
+    payload: {
+      url: 'badurl'
+    }
+  };
+  const data = await server.inject(options);
+  expect(data.statusCode).toBe(400);
+  expect(data.payload).toBe('Bad Request: bad URL received');
+});
+
+test('POST request with correct URL returns success', async () => {
+  const options = {
+    method: 'POST',
+    url: '/',
+    payload: {
+      url: 'http://example.com'
+    }
+  };
+
+  const data = await server.inject(options);
+  expect(data.statusCode).toBe(204);
+  expect(data.payload).toBe('');
+});