samples: add create agent code sample (#279)

* samples: add create agent code sample

* Lint fix

* Fix failing test

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* Rebased

* Revised Code per comments

* lint fix

* Added Comment for timezone

* Fixed lint

* Used String.format

* Added stdOut Var

* removed parent variable

* Update Tests

* lint fix

* removed parentPath

* removed unreachable statemt

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* Revised Code Per Comments

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

dialogflow-cx/snippets/src/main/java/dialogflow/cx/CreateAgent.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2021 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.
+ */
+
+package dialogflow.cx;
+
+// [START dialogflow_cx_create_agent]
+
+import com.google.cloud.dialogflow.cx.v3.Agent;
+import com.google.cloud.dialogflow.cx.v3.Agent.Builder;
+import com.google.cloud.dialogflow.cx.v3.AgentsClient;
+import com.google.cloud.dialogflow.cx.v3.AgentsSettings;
+import java.io.IOException;
+
+public class CreateAgent {
+
+  public static void main(String[] args) throws IOException {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectId = "my-project-id";
+    String displayName = "my-display-name";
+
+    createAgent(projectId, displayName);
+  }
+
+  public static Agent createAgent(String parent, String displayName) throws IOException {
+
+    String apiEndpoint = "global-dialogflow.googleapis.com:443";
+
+    AgentsSettings agentsSettings = AgentsSettings.newBuilder().setEndpoint(apiEndpoint).build();
+    try (AgentsClient client = AgentsClient.create(agentsSettings)) {
+      // Set the details of the Agent to create
+      Builder build = Agent.newBuilder();
+
+      build.setDefaultLanguageCode("en");
+      build.setDisplayName(displayName);
+      // Correct format for timezone is location/city
+      // For example America/Los_Angeles, Europe/Madrid, Asia/Tokyo
+      build.setTimeZone("America/Los_Angeles");
+
+      Agent agent = build.build();
+      String parentPath = String.format("projects/%s/locations/%s", parent, "global");
+
+      // Calls the create agent api and returns the created Agent
+      Agent response = client.createAgent(parentPath, agent);
+      System.out.println(response);
+      return response;
+    }
+  }
+}
+// [END dialogflow_cx_create_agent]

dialogflow-cx/snippets/src/test/java/dialogflow/cx/CreateAgentIT.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2021 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.
+ */
+
+package dialogflow.cx;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.cloud.dialogflow.cx.v3.AgentsClient;
+import com.google.cloud.dialogflow.cx.v3.AgentsSettings;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.PrintStream;
+import java.util.UUID;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class CreateAgentIT {
+
+  private static String PROJECT_ID = System.getenv().get("GOOGLE_CLOUD_PROJECT");
+  private static String agentPath = "";
+  private ByteArrayOutputStream stdOut;
+  private static PrintStream originalOut;
+
+  @Before
+  public void setUp() throws IOException {
+    originalOut = System.out;
+    stdOut = new ByteArrayOutputStream();
+    System.setOut(new PrintStream(stdOut));
+  }
+
+  @After
+  public void tearDown() throws IOException {
+    System.setOut(originalOut);
+    String apiEndpoint = "global-dialogflow.googleapis.com:443";
+
+    AgentsSettings agentsSettings = AgentsSettings.newBuilder().setEndpoint(apiEndpoint).build();
+    AgentsClient client = AgentsClient.create(agentsSettings);
+
+    client.deleteAgent(CreateAgentIT.agentPath);
+  }
+
+  @Test
+  public void testCreateAgent() throws IOException {
+    String fakeAgent = String.format("fake_agent_%s", UUID.randomUUID().toString());
+
+    CreateAgentIT.agentPath = CreateAgent.createAgent(PROJECT_ID, fakeAgent).getName();
+
+    assertThat(stdOut.toString()).contains(fakeAgent);
+  }
+}