content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.cli;
  
  import static alluxio.exception.ExceptionMessage.INVALID_ARGS_NUM;
  import static org.junit.Assert.assertEquals;
  
  import alluxio.exception.status.InvalidArgumentException;
  
  import org.apache.commons.cli.CommandLine;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  
  /**
   * Unit tests for {@link Command}.
   */
  public final class CommandTest {
  
    private static final String COMMAND_NAME = "TestCommand";
  
    @Rule
    public ExpectedException mExpectedException = ExpectedException.none();
  
    private final class TestCommand implements Command {
  
      public TestCommand() {
      }
  
      @Override
      public String getCommandName() {
        return COMMAND_NAME;
      }
  
      @Override
      public String getDescription() {
        return "Description";
      }
  
      @Override
      public void validateArgs(CommandLine cl) throws InvalidArgumentException {
        CommandUtils.checkNumOfArgsEquals(this, cl, 1);
      }
  
      @Override
      public String getUsage() {
        return "usage";
      }
  
      @Override
      public int run(CommandLine cl) {
        return 0;
      }
    }
  
    @Test
    public void expectedNumArgs() throws Exception {
      TestCommand cmd = new TestCommand();
      CommandLine commandLine = cmd.parseAndValidateArgs("arg1");
      assertEquals(1, commandLine.getArgs().length);
    }
  
    @Test
    public void unexpectedNumArgs() throws Exception {
      TestCommand cmd = new TestCommand();
  
      mExpectedException.expect(InvalidArgumentException.class);
      mExpectedException.expectMessage(INVALID_ARGS_NUM.getMessage(cmd.getCommandName(), 1, 2));
      cmd.parseAndValidateArgs("arg1", "arg2");
    }
  }
  