samples: add update intent code sample (#639)

* Added Fieldmask snippet

* Update lint

* Fixed lint issue

* Rename updateIntentTest.java to UpdateIntentTest.java

* Lint Fix

* Lint fix

* Fixed spacing

* Update Testing

* Added missing imports

* Added Missing Imports

* Added Missing Imports

* delete intent after testing

* change name of test

* Updated Code and Test

* lint fix

* Fix test

* Fixed test

* Test fix

* Update failing test

* Lint fix

* lint fix

* lint fix

* Fixed failing test

* Corrected intent path

* Revised code per comments

* lint fix

* lint fix

* failing test fix

dialogflow/snippets/src/main/java/com/example/dialogflow/UpdateIntent.java

@@ -0,0 +1,73 @@
+/*
+ * 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 com.example.dialogflow;
+
+// [START dialogflow_es_update_intent]
+import com.google.cloud.dialogflow.v2.Intent;
+import com.google.cloud.dialogflow.v2.Intent.Builder;
+import com.google.cloud.dialogflow.v2.IntentsClient;
+import com.google.cloud.dialogflow.v2.UpdateIntentRequest;
+import com.google.protobuf.FieldMask;
+import java.io.IOException;
+
+
+public class UpdateIntent {
+
+  public static void main(String[] args) throws IOException {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectId = "my-project-id";
+    String intentId = "my-intent-id";
+    String location = "my-location";
+    String displayName = "my-display-name";
+    updateIntent(projectId, intentId, location, displayName);
+  }
+
+  // DialogFlow API Update Intent sample.
+  public static void updateIntent(
+      String projectId, String intentId, String location, String displayName)
+      throws IOException {
+    try (IntentsClient client = IntentsClient.create()) {
+      String intentPath =
+          "projects/"
+              + projectId
+              + "/locations/"
+              + location
+              + "/agent/intents/"
+              + intentId;
+
+      Builder intentBuilder = client.getIntent(intentPath).toBuilder();
+
+      intentBuilder.setDisplayName(displayName);
+      FieldMask fieldMask = FieldMask.newBuilder()
+          .addPaths("display_name")
+          .build();
+
+      Intent intent = intentBuilder.build();
+      UpdateIntentRequest request =
+          UpdateIntentRequest.newBuilder()
+              .setIntent(intent)
+              .setLanguageCode("en")
+              .setUpdateMask(fieldMask)
+              .build();
+
+      // Make API request to update intent using fieldmask
+      Intent response = client.updateIntent(request);
+      System.out.println(response);
+    }
+  }
+}
+// [END dialogflow_es_update_intent]

dialogflow/snippets/src/test/java/com/example/dialogflow/UpdateIntentIT.java

@@ -0,0 +1,86 @@
+/*
+ * 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 com.example.dialogflow;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.cloud.dialogflow.v2.Agent;
+import com.google.cloud.dialogflow.v2.Agent.Builder;
+import com.google.cloud.dialogflow.v2.AgentsClient;
+import com.google.cloud.dialogflow.v2.AgentsSettings;
+import com.google.cloud.dialogflow.v2.Intent;
+import com.google.cloud.dialogflow.v2.IntentsClient;
+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 UpdateIntentIT {
+
+  private static String PROJECT_ID = System.getenv().get("GOOGLE_CLOUD_PROJECT");
+
+  private static String parent = "projects/" + PROJECT_ID + "/locations/global/agent";
+  private static String intentID = "";
+  private static String intentPath = "";
+
+  private ByteArrayOutputStream stdOut;
+
+  @Before
+  public void setUp() throws IOException {
+
+    stdOut = new ByteArrayOutputStream();
+    System.setOut(new PrintStream(stdOut));
+
+    try (IntentsClient intentsClient = IntentsClient.create()) {
+      com.google.cloud.dialogflow.v2.Intent.Builder intent = Intent.newBuilder();
+      intent.setDisplayName("temp_intent_" + UUID.randomUUID().toString());
+
+      UpdateIntentIT.intentPath = intentsClient.createIntent(parent, intent.build()).getName();
+      UpdateIntentIT.intentID = UpdateIntentIT.intentPath.split("/")[6];
+    }
+  }
+
+  @After
+  public void tearDown() throws IOException {
+    stdOut = null;
+    System.setOut(null);
+
+    IntentsClient client = IntentsClient.create();
+
+    String intentPath = 
+        "projects/"
+            + PROJECT_ID
+            + "/locations/global/agent/intents/"
+            + UpdateIntentIT.intentID;
+
+    client.deleteIntent(intentPath);
+  }
+
+  @Test
+  public void testUpdateIntent() throws IOException {
+
+    String fakeIntent = "fake_intent_" + UUID.randomUUID().toString();
+
+    UpdateIntent.updateIntent(
+        PROJECT_ID, UpdateIntentIT.intentID, "global", fakeIntent);
+
+    assertThat(stdOut.toString()).contains(fakeIntent);
+  }
+}