chore: initial build of document ai library

document-ai/snippets/.eslintrc.yml

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+---
+rules:
+  no-console: off
+  node/no-missing-require: off
+  node/no-extraneous-require: off
+

document-ai/snippets/package.json

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+{
+  "name": "nodejs-document-ai-samples",
+  "private": true,
+  "license": "Apache-2.0",
+  "author": "Google LLC",
+  "engines": {
+    "node": ">=8"
+  },
+  "files": [
+    "*.js"
+  ],
+  "scripts": {
+    "test": "mocha test/*.js"
+  },
+  "dependencies": {
+    "@google-cloud/document-ai": "^1.0.0"
+  },
+  "devDependencies": {
+    "chai": "^4.2.0",
+    "mocha": "^6.2.0"
+  }
+}

document-ai/snippets/quickstart.js

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+/**
+ * Copyright 2019, Google, Inc.
+ * 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';
+
+/**
+ * DESCRIBE WHAT THIS SAMPLE DOES.
+ * @param {string} LIST EXPECTED ARGUMENTS.
+ */
+async function main() {
+  // [START LIBRARY_NAME_quickstart]
+  async function batchProcessDocument() {
+    const {
+      DocumentUnderstandingServiceClient,
+    } = require('@google-cloud/document');
+    const client = new DocumentUnderstandingServiceClient();
+    // TODO: write sample here that demonstrates batch processing of documents.
+    console.info(client);
+  }
+  // [END LIBRARY_NAME_quickstart]
+  await batchProcessDocument();
+}
+
+main(...process.argv.slice(2)).catch(err => {
+  console.error(err);
+  process.exitCode = 1;
+});

document-ai/snippets/test/.eslintrc.yml

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+---
+env:
+  mocha: true
+rules:
+  node/no-extraneous-require: off

document-ai/snippets/test/quickstart.js

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+/**
+ * Copyright 2019, Google, Inc.
+ * 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 path = require('path');
+const {assert} = require('chai');
+const cp = require('child_process');
+
+const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
+
+const cwd = path.join(__dirname, '..');
+
+describe('Quickstart', () => {
+  it('should run quickstart', async () => {
+    const stdout = execSync(`node ./quickstart.js`, {cwd});
+    assert.ok(stdout);
+  });
+});