/*
 * Copyright 2025 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.
 */

package com.google.showcase.v1beta1;

import static com.google.showcase.v1beta1.IdentityClient.ListLocationsPagedResponse;
import static com.google.showcase.v1beta1.IdentityClient.ListUsersPagedResponse;

import com.google.api.gax.core.NoCredentialsProvider;
import com.google.api.gax.httpjson.GaxHttpJsonProperties;
import com.google.api.gax.httpjson.testing.MockHttpService;
import com.google.api.gax.rpc.ApiClientHeaderProvider;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.ApiExceptionFactory;
import com.google.api.gax.rpc.InvalidArgumentException;
import com.google.api.gax.rpc.StatusCode;
import com.google.api.gax.rpc.testing.FakeStatusCode;
import com.google.cloud.location.GetLocationRequest;
import com.google.cloud.location.ListLocationsRequest;
import com.google.cloud.location.ListLocationsResponse;
import com.google.cloud.location.Location;
import com.google.common.collect.Lists;
import com.google.iam.v1.AuditConfig;
import com.google.iam.v1.Binding;
import com.google.iam.v1.GetIamPolicyRequest;
import com.google.iam.v1.GetPolicyOptions;
import com.google.iam.v1.Policy;
import com.google.iam.v1.SetIamPolicyRequest;
import com.google.iam.v1.TestIamPermissionsRequest;
import com.google.iam.v1.TestIamPermissionsResponse;
import com.google.protobuf.Any;
import com.google.protobuf.ByteString;
import com.google.protobuf.Empty;
import com.google.protobuf.FieldMask;
import com.google.protobuf.Timestamp;
import com.google.showcase.v1beta1.stub.HttpJsonIdentityStub;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import javax.annotation.Generated;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

@Generated("by gapic-generator-java")
public class IdentityClientHttpJsonTest {
  private static MockHttpService mockService;
  private static IdentityClient client;

  @BeforeClass
  public static void startStaticServer() throws IOException {
    mockService =
        new MockHttpService(
            HttpJsonIdentityStub.getMethodDescriptors(), IdentitySettings.getDefaultEndpoint());
    IdentitySettings settings =
        IdentitySettings.newHttpJsonBuilder()
            .setTransportChannelProvider(
                IdentitySettings.defaultHttpJsonTransportProviderBuilder()
                    .setHttpTransport(mockService)
                    .build())
            .setCredentialsProvider(NoCredentialsProvider.create())
            .build();
    client = IdentityClient.create(settings);
  }

  @AfterClass
  public static void stopServer() {
    client.close();
  }

  @Before
  public void setUp() {}

  @After
  public void tearDown() throws Exception {
    mockService.reset();
  }

  @Test
  public void createUserTest() throws Exception {
    User expectedResponse =
        User.newBuilder()
            .setName(UserName.of("[USER]").toString())
            .setDisplayName("displayName1714148973")
            .setEmail("email96619420")
            .setCreateTime(Timestamp.newBuilder().build())
            .setUpdateTime(Timestamp.newBuilder().build())
            .setAge(96511)
            .setHeightFeet(-1032737338)
            .setNickname("nickname70690926")
            .setEnableNotifications(true)
            .build();
    mockService.addResponse(expectedResponse);

    String displayName = "displayName1714148973";
    String email = "email96619420";

    User actualResponse = client.createUser(displayName, email);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void createUserExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      String displayName = "displayName1714148973";
      String email = "email96619420";
      client.createUser(displayName, email);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void createUserTest2() throws Exception {
    User expectedResponse =
        User.newBuilder()
            .setName(UserName.of("[USER]").toString())
            .setDisplayName("displayName1714148973")
            .setEmail("email96619420")
            .setCreateTime(Timestamp.newBuilder().build())
            .setUpdateTime(Timestamp.newBuilder().build())
            .setAge(96511)
            .setHeightFeet(-1032737338)
            .setNickname("nickname70690926")
            .setEnableNotifications(true)
            .build();
    mockService.addResponse(expectedResponse);

    String displayName = "displayName1714148973";
    String email = "email96619420";
    int age = 96511;
    String nickname = "nickname70690926";
    boolean enableNotifications = true;
    double heightFeet = -1032737338;

    User actualResponse =
        client.createUser(displayName, email, age, nickname, enableNotifications, heightFeet);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void createUserExceptionTest2() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      String displayName = "displayName1714148973";
      String email = "email96619420";
      int age = 96511;
      String nickname = "nickname70690926";
      boolean enableNotifications = true;
      double heightFeet = -1032737338;
      client.createUser(displayName, email, age, nickname, enableNotifications, heightFeet);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void getUserTest() throws Exception {
    User expectedResponse =
        User.newBuilder()
            .setName(UserName.of("[USER]").toString())
            .setDisplayName("displayName1714148973")
            .setEmail("email96619420")
            .setCreateTime(Timestamp.newBuilder().build())
            .setUpdateTime(Timestamp.newBuilder().build())
            .setAge(96511)
            .setHeightFeet(-1032737338)
            .setNickname("nickname70690926")
            .setEnableNotifications(true)
            .build();
    mockService.addResponse(expectedResponse);

    UserName name = UserName.of("[USER]");

    User actualResponse = client.getUser(name);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void getUserExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      UserName name = UserName.of("[USER]");
      client.getUser(name);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void getUserTest2() throws Exception {
    User expectedResponse =
        User.newBuilder()
            .setName(UserName.of("[USER]").toString())
            .setDisplayName("displayName1714148973")
            .setEmail("email96619420")
            .setCreateTime(Timestamp.newBuilder().build())
            .setUpdateTime(Timestamp.newBuilder().build())
            .setAge(96511)
            .setHeightFeet(-1032737338)
            .setNickname("nickname70690926")
            .setEnableNotifications(true)
            .build();
    mockService.addResponse(expectedResponse);

    String name = "users/user-6376";

    User actualResponse = client.getUser(name);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void getUserExceptionTest2() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      String name = "users/user-6376";
      client.getUser(name);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void updateUserTest() throws Exception {
    User expectedResponse =
        User.newBuilder()
            .setName(UserName.of("[USER]").toString())
            .setDisplayName("displayName1714148973")
            .setEmail("email96619420")
            .setCreateTime(Timestamp.newBuilder().build())
            .setUpdateTime(Timestamp.newBuilder().build())
            .setAge(96511)
            .setHeightFeet(-1032737338)
            .setNickname("nickname70690926")
            .setEnableNotifications(true)
            .build();
    mockService.addResponse(expectedResponse);

    UpdateUserRequest request =
        UpdateUserRequest.newBuilder()
            .setUser(
                User.newBuilder()
                    .setName(UserName.of("[USER]").toString())
                    .setDisplayName("displayName1714148973")
                    .setEmail("email96619420")
                    .setCreateTime(Timestamp.newBuilder().build())
                    .setUpdateTime(Timestamp.newBuilder().build())
                    .setAge(96511)
                    .setHeightFeet(-1032737338)
                    .setNickname("nickname70690926")
                    .setEnableNotifications(true)
                    .build())
            .setUpdateMask(FieldMask.newBuilder().build())
            .build();

    User actualResponse = client.updateUser(request);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void updateUserExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      UpdateUserRequest request =
          UpdateUserRequest.newBuilder()
              .setUser(
                  User.newBuilder()
                      .setName(UserName.of("[USER]").toString())
                      .setDisplayName("displayName1714148973")
                      .setEmail("email96619420")
                      .setCreateTime(Timestamp.newBuilder().build())
                      .setUpdateTime(Timestamp.newBuilder().build())
                      .setAge(96511)
                      .setHeightFeet(-1032737338)
                      .setNickname("nickname70690926")
                      .setEnableNotifications(true)
                      .build())
              .setUpdateMask(FieldMask.newBuilder().build())
              .build();
      client.updateUser(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void deleteUserTest() throws Exception {
    Empty expectedResponse = Empty.newBuilder().build();
    mockService.addResponse(expectedResponse);

    UserName name = UserName.of("[USER]");

    client.deleteUser(name);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void deleteUserExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      UserName name = UserName.of("[USER]");
      client.deleteUser(name);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void deleteUserTest2() throws Exception {
    Empty expectedResponse = Empty.newBuilder().build();
    mockService.addResponse(expectedResponse);

    String name = "users/user-6376";

    client.deleteUser(name);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void deleteUserExceptionTest2() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      String name = "users/user-6376";
      client.deleteUser(name);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void listUsersTest() throws Exception {
    User responsesElement = User.newBuilder().build();
    ListUsersResponse expectedResponse =
        ListUsersResponse.newBuilder()
            .setNextPageToken("")
            .addAllUsers(Arrays.asList(responsesElement))
            .build();
    mockService.addResponse(expectedResponse);

    ListUsersRequest request =
        ListUsersRequest.newBuilder()
            .setPageSize(883849137)
            .setPageToken("pageToken873572522")
            .build();

    ListUsersPagedResponse pagedListResponse = client.listUsers(request);

    List<User> resources = Lists.newArrayList(pagedListResponse.iterateAll());

    Assert.assertEquals(1, resources.size());
    Assert.assertEquals(expectedResponse.getUsersList().get(0), resources.get(0));

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void listUsersExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      ListUsersRequest request =
          ListUsersRequest.newBuilder()
              .setPageSize(883849137)
              .setPageToken("pageToken873572522")
              .build();
      client.listUsers(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void listLocationsTest() throws Exception {
    Location responsesElement = Location.newBuilder().build();
    ListLocationsResponse expectedResponse =
        ListLocationsResponse.newBuilder()
            .setNextPageToken("")
            .addAllLocations(Arrays.asList(responsesElement))
            .build();
    mockService.addResponse(expectedResponse);

    ListLocationsRequest request =
        ListLocationsRequest.newBuilder()
            .setName("projects/project-3664")
            .setFilter("filter-1274492040")
            .setPageSize(883849137)
            .setPageToken("pageToken873572522")
            .build();

    ListLocationsPagedResponse pagedListResponse = client.listLocations(request);

    List<Location> resources = Lists.newArrayList(pagedListResponse.iterateAll());

    Assert.assertEquals(1, resources.size());
    Assert.assertEquals(expectedResponse.getLocationsList().get(0), resources.get(0));

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void listLocationsExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      ListLocationsRequest request =
          ListLocationsRequest.newBuilder()
              .setName("projects/project-3664")
              .setFilter("filter-1274492040")
              .setPageSize(883849137)
              .setPageToken("pageToken873572522")
              .build();
      client.listLocations(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void getLocationTest() throws Exception {
    Location expectedResponse =
        Location.newBuilder()
            .setName("name3373707")
            .setLocationId("locationId1541836720")
            .setDisplayName("displayName1714148973")
            .putAllLabels(new HashMap<String, String>())
            .setMetadata(Any.newBuilder().build())
            .build();
    mockService.addResponse(expectedResponse);

    GetLocationRequest request =
        GetLocationRequest.newBuilder()
            .setName("projects/project-9062/locations/location-9062")
            .build();

    Location actualResponse = client.getLocation(request);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void getLocationExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      GetLocationRequest request =
          GetLocationRequest.newBuilder()
              .setName("projects/project-9062/locations/location-9062")
              .build();
      client.getLocation(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void setIamPolicyTest() throws Exception {
    Policy expectedResponse =
        Policy.newBuilder()
            .setVersion(351608024)
            .addAllBindings(new ArrayList<Binding>())
            .addAllAuditConfigs(new ArrayList<AuditConfig>())
            .setEtag(ByteString.EMPTY)
            .build();
    mockService.addResponse(expectedResponse);

    SetIamPolicyRequest request =
        SetIamPolicyRequest.newBuilder()
            .setResource(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
            .setPolicy(Policy.newBuilder().build())
            .setUpdateMask(FieldMask.newBuilder().build())
            .build();

    Policy actualResponse = client.setIamPolicy(request);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void setIamPolicyExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      SetIamPolicyRequest request =
          SetIamPolicyRequest.newBuilder()
              .setResource(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
              .setPolicy(Policy.newBuilder().build())
              .setUpdateMask(FieldMask.newBuilder().build())
              .build();
      client.setIamPolicy(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void getIamPolicyTest() throws Exception {
    Policy expectedResponse =
        Policy.newBuilder()
            .setVersion(351608024)
            .addAllBindings(new ArrayList<Binding>())
            .addAllAuditConfigs(new ArrayList<AuditConfig>())
            .setEtag(ByteString.EMPTY)
            .build();
    mockService.addResponse(expectedResponse);

    GetIamPolicyRequest request =
        GetIamPolicyRequest.newBuilder()
            .setResource(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
            .setOptions(GetPolicyOptions.newBuilder().build())
            .build();

    Policy actualResponse = client.getIamPolicy(request);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void getIamPolicyExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      GetIamPolicyRequest request =
          GetIamPolicyRequest.newBuilder()
              .setResource(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
              .setOptions(GetPolicyOptions.newBuilder().build())
              .build();
      client.getIamPolicy(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }

  @Test
  public void testIamPermissionsTest() throws Exception {
    TestIamPermissionsResponse expectedResponse =
        TestIamPermissionsResponse.newBuilder().addAllPermissions(new ArrayList<String>()).build();
    mockService.addResponse(expectedResponse);

    TestIamPermissionsRequest request =
        TestIamPermissionsRequest.newBuilder()
            .setResource(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
            .addAllPermissions(new ArrayList<String>())
            .build();

    TestIamPermissionsResponse actualResponse = client.testIamPermissions(request);
    Assert.assertEquals(expectedResponse, actualResponse);

    List<String> actualRequests = mockService.getRequestPaths();
    Assert.assertEquals(1, actualRequests.size());

    String apiClientHeaderKey =
        mockService
            .getRequestHeaders()
            .get(ApiClientHeaderProvider.getDefaultApiClientHeaderKey())
            .iterator()
            .next();
    Assert.assertTrue(
        GaxHttpJsonProperties.getDefaultApiClientHeaderPattern()
            .matcher(apiClientHeaderKey)
            .matches());
  }

  @Test
  public void testIamPermissionsExceptionTest() throws Exception {
    ApiException exception =
        ApiExceptionFactory.createException(
            new Exception(), FakeStatusCode.of(StatusCode.Code.INVALID_ARGUMENT), false);
    mockService.addException(exception);

    try {
      TestIamPermissionsRequest request =
          TestIamPermissionsRequest.newBuilder()
              .setResource(BlurbName.ofRoomBlurbName("[ROOM]", "[BLURB]").toString())
              .addAllPermissions(new ArrayList<String>())
              .build();
      client.testIamPermissions(request);
      Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
      // Expected exception.
    }
  }
}
