Add tests

Author: ace-n

functions/security/index.js

@@ -29,7 +29,7 @@ const metadataServerURL =
   'http://metadata/computeMetadata/v1/instance/service-accounts/default/identity?audience=';
 const tokenUrl = metadataServerURL + functionURL;
 
-exports.bearerToken = async (req, res) => {
+exports.callingFunction = async (req, res) => {
   // Fetch the token
   const tokenResponse = await get(tokenUrl, {
     headers: {

functions/security/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "nodejs-docs-samples-functions-security",
+  "version": "0.0.1",
+  "private": true,
+  "license": "Apache-2.0",
+  "author": "Google Inc.",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git"
+  },
+  "engines": {
+    "node": ">=8.0.0"
+  },
+  "scripts": {
+    "test": "mocha test/*.test.js"
+  },
+  "dependencies": {
+    "axios": "^0.19.2",
+    "eslint-plugin-node": "^11.1.0",
+    "mocha": "^7.1.1"
+  },
+  "devDependencies": {
+    "assert": "^2.0.0",
+    "proxyquire": "^2.1.3",
+    "sinon": "^9.0.1"
+  }
+}

functions/security/test/index.test.js

@@ -0,0 +1,59 @@
+// Copyright 2017 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+const proxyquire = require('proxyquire').noCallThru();
+const sinon = require('sinon');
+const assert = require('assert');
+
+const getSample = () => {
+  const getMock = sinon
+    .stub()
+    .onFirstCall()
+    .resolves({data: 'some-token'})
+    .onSecondCall()
+    .resolves({data: 'function-response'});
+
+  const axiosMock = {get: getMock};
+
+  const resMock = {};
+  resMock.status = sinon.stub().returns(resMock);
+  resMock.send = sinon.stub().returns(resMock);
+
+  return {
+    sample: proxyquire('../', {
+      axios: axiosMock,
+    }),
+    mocks: {
+      res: resMock,
+      axios: axiosMock,
+    },
+  };
+};
+
+describe('functions_bearer_token', () => {
+  it('should run', async () => {
+    const {sample, mocks} = getSample();
+
+    await sample.callingFunction(null, mocks.res);
+
+    assert(mocks.axios.get.calledTwice);
+    assert.deepEqual(mocks.axios.get.firstCall.args[1], {
+      headers: {'Metadata-Flavor': 'Google'},
+    });
+
+    assert(mocks.res.send.calledWith('function-response'));
+  });
+});