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   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.
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  package org.apache.camel.component.google.functions.integration;
  
  import java.util.List;
  
  import com.google.cloud.functions.v1.CloudFunction;
  import org.apache.camel.EndpointInject;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.component.google.functions.GoogleCloudFunctionsConstants;
  import org.apache.camel.component.mock.MockEndpoint;
  import org.apache.camel.test.junit5.CamelTestSupport;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.condition.EnabledIfEnvironmentVariable;
  
  @EnabledIfEnvironmentVariable(named = "GOOGLE_APPLICATION_CREDENTIALS", matches = ".*",
                                disabledReason = "Application credentials were not provided")
  public class GoogleCloudIT extends CamelTestSupport {
  
      final String functionNameReverseString = "function-reverse-string";
      final String serviceAccountKeyFile = System.getenv("GOOGLE_APPLICATION_CREDENTIALS");
      final String project = "myProject";
      final String location = "us-central1";
      final String functionCreationEntryPoint = "com.example.Example";
      final String functionCreationSourceCode = "gs://myCamelBucket/function-source.zip";
  
      @EndpointInject("mock:functionsList1")
      private MockEndpoint mockFunctionList1;
      @EndpointInject("mock:getFunction")
      private MockEndpoint mockGetFunction;
      @EndpointInject("mock:generateDownloadUrl")
      private MockEndpoint mockGenerateDownloadUrl;
      @EndpointInject("mock:callFunction")
      private MockEndpoint mockCallFunction;
      @EndpointInject("mock:createFunction")
      private MockEndpoint mockCreateFunction;
  
      @Override
      protected RouteBuilder createRouteBuilder() {
          return new RouteBuilder() {
              @Override
              public void configure() {
  
                  // list functions
                  from("timer:timer1?repeatCount=1")
                          .to("google-functions://" + functionNameReverseString + "?serviceAccountKey="
                              + serviceAccountKeyFile + "&project=" + project + "&location=" + location
                              + "&operation=listFunctions")
                          .log("body:${body}").split(bodyAs(List.class)).process(exchange -> {
                              CloudFunction cf = exchange.getIn().getBody(CloudFunction.class);
                              exchange.getIn().setBody(cf.getName());
                          }).to("direct:directFunctionList1").to("mock:functionsList1");
  
                  // get function
                  from("direct:directFunctionList1").to("google-functions://" + functionNameReverseString
                                                        + "?serviceAccountKey=" + serviceAccountKeyFile + "&project=" + project
                                                        + "&location="
                                                        + location + "&operation=getFunction")
                          .log("body:${body}").to("direct:getFunction").to("mock:getFunction");
  
                  // generate download url
                  from("timer:timer1?repeatCount=1").to("google-functions://" + functionNameReverseString
                                                        + "?serviceAccountKey=" + serviceAccountKeyFile + "&project=" + project
                                                        + "&location="
                                                        + location + "&operation=generateDownloadUrl")
                          .log("body:${body}").to("mock:generateDownloadUrl");
  
                  // call function
                  from("timer:timer1?repeatCount=1").process(exchange -> {
                      exchange.getIn().setBody("just a message");
                  }).to("google-functions://" + functionNameReverseString + "?serviceAccountKey=" + serviceAccountKeyFile
                        + "&project=" + project + "&location=" + location + "&operation=callFunction")
                          .log("body:${body}").to("mock:callFunction");
  
                  // create function
                  final String randomFunctionName = createRandomFunctionName();
                  from("timer:timer1?repeatCount=1").process(exchange -> {
                      exchange.getIn().setHeader(GoogleCloudFunctionsConstants.ENTRY_POINT, functionCreationEntryPoint);
                      exchange.getIn().setHeader(GoogleCloudFunctionsConstants.RUNTIME, "java11");
                      exchange.getIn().setHeader(GoogleCloudFunctionsConstants.SOURCE_ARCHIVE_URL,
                              functionCreationSourceCode);
                  }).to("google-functions://" + randomFunctionName + "?serviceAccountKey=" + serviceAccountKeyFile
                        + "&project=" + project + "&location=" + location + "&operation=createFunction")
                          .log("body:${body}").to("mock:createFunction");
  
                  // delete function
                  from("timer:timer1?repeatCount=1")
                          .to("google-functions://" + "randomFunction_0" + "?serviceAccountKey=" + serviceAccountKeyFile
                              + "&project=" + project + "&location=" + location + "&operation=deleteFunction")
                          .log("body:${body}");
  
              }
          };
      }
  
      @Test
      public void sendIn() throws Exception {
          mockFunctionList1.expectedMinimumMessageCount(1);
          mockGenerateDownloadUrl.expectedMessageCount(1);
          mockCallFunction.expectedMessageCount(1);
          mockCreateFunction.expectedMessageCount(1);
  
          Thread.sleep(10000);
          int functionListCounter = mockFunctionList1.getReceivedCounter();
          mockGetFunction.expectedMessageCount(functionListCounter);
  
          MockEndpoint.assertIsSatisfied(context);
      }
  
      private String createRandomFunctionName() {
          int r = (int) (Math.random() * 10000);
          return "randomFunction_" + r;
      }
  
  }
  