feat(samples): add sample of configuring alternate apiEndpoint

README.md

@@ -85,6 +85,7 @@ has instructions for running the samples.
 | Detect.v1p3beta1 | [source code](https://github.com/googleapis/nodejs-vision/blob/master/samples/detect.v1p3beta1.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-vision&page=editor&open_in_editor=samples/detect.v1p3beta1.js,samples/README.md) |
 | Face Detection | [source code](https://github.com/googleapis/nodejs-vision/blob/master/samples/faceDetection.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-vision&page=editor&open_in_editor=samples/faceDetection.js,samples/README.md) |
 | Quickstart | [source code](https://github.com/googleapis/nodejs-vision/blob/master/samples/quickstart.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-vision&page=editor&open_in_editor=samples/quickstart.js,samples/README.md) |
+| Set Endpoint | [source code](https://github.com/googleapis/nodejs-vision/blob/master/samples/setEndpoint.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-vision&page=editor&open_in_editor=samples/setEndpoint.js,samples/README.md) |
 | Text Detection | [source code](https://github.com/googleapis/nodejs-vision/blob/master/samples/textDetection.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-vision&page=editor&open_in_editor=samples/textDetection.js,samples/README.md) |
 
 

linkinator.config.json

@@ -2,6 +2,7 @@
   "recurse": true,
   "skip": [
     "https://codecov.io/gh/googleapis/",
-    "www.googleapis.com"
+    "www.googleapis.com",
+    "setEndpoint.js"
   ]
 }

samples/README.md

@@ -17,6 +17,7 @@
   * [Detect.v1p3beta1](#detect.v1p3beta1)
   * [Face Detection](#face-detection)
   * [Quickstart](#quickstart)
+  * [Set Endpoint](#set-endpoint)
   * [Text Detection](#text-detection)
 
 ## Before you begin
@@ -113,6 +114,22 @@ __Usage:__
 
 
 
+### Set Endpoint
+
+View the [source code]https://github.com/googleapis/nodejs-vision/blob/master/samples/setEndpoint.js)
+
+[![Open in Cloud shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-vision&page=editor&open_in_editor=samples/setEndpoint.js,samples/README.md)
+
+__Usage:__
+
+`node setEndpoint.js`
+
+-----
+
+
+
+
+
 ### Text Detection
 
 View the [source code](https://github.com/googleapis/nodejs-vision/blob/master/samples/textDetection.js).

samples/setEndpoint.js

@@ -0,0 +1,36 @@
+// Copyright 2019 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
+//
+//     https://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';
+
+async function setEndpoint() {
+  // [START vision_set_endpoint]
+  // Imports the Google Cloud client library
+  const vision = require('@google-cloud/vision');
+
+  // Specifies the location of the api endpoint
+  const clientOptions = {apiEndpoint: 'eu-vision.googleapis.com'};
+
+  // Creates a client
+  const client = new vision.ImageAnnotatorClient(clientOptions);
+  // [END vision_set_endpoint]
+
+  // Performs label detection on the image file
+  const [result] = await client.labelDetection('./resources/wakeupcat.jpg');
+  const labels = result.labelAnnotations;
+  console.log('Labels:');
+  labels.forEach(label => console.log(label.description));
+}
+
+setEndpoint().catch(console.error);

samples/system-test/setEndpoint.test.js

@@ -0,0 +1,28 @@
+// Copyright 2019 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
+//
+//     https://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 {assert} = require('chai');
+const cp = require('child_process');
+
+const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
+
+describe(`set endpoint for vision api call`, () => {
+  it(`should detect labels in a remote file from a pre-set api endpoint`, async () => {
+    const stdout = execSync('node setEndpoint.js');
+    assert.match(stdout, /Labels:/);
+    assert.match(stdout, /cat/);
+  });
+});