content: /*
   * 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 io.airlift.airline;
  
  import io.airlift.airline.Cli.CliBuilder;
  import org.testng.annotations.Test;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatThrownBy;
  
  public class TestCli
  {
      @Test
      public void testGroupWithoutDefaultCommand()
      {
          CliBuilder<Runnable> builder = Cli.builder("command");
          builder.withGroup("subcommand")
                  .withCommand(Help.class);
  
          Cli<Runnable> cli = builder.build();
  
          assertThatThrownBy(cli::parse)
                  .isInstanceOf(ParseCommandMissingException.class)
                  .hasMessage("No command specified");
  
          assertThatThrownBy(() -> cli.parse("subcommand"))
                  .isInstanceOf(ParseCommandMissingException.class)
                  .hasMessage("No command specified");
  
          assertThat(cli.parse("subcommand", "help")).isInstanceOf(Help.class);
      }
  }
  