/*
 * 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.
 */
package org.apache.geode.internal.process;

import static java.util.concurrent.TimeUnit.SECONDS;
import static org.apache.geode.internal.process.FileProcessController.DEFAULT_STATUS_TIMEOUT_MILLIS;
import static org.apache.geode.internal.process.ProcessUtils.identifyPid;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.Mockito.mock;

import java.util.concurrent.TimeUnit;

import org.junit.Before;
import org.junit.Test;

import org.apache.geode.lang.AttachAPINotFoundException;

/**
 * Unit tests for {@link FileProcessController}.
 */
public class FileProcessControllerTest {

  private FileProcessController controller;
  private FileControllerParameters mockParameters;
  private int pid;
  private long timeout;
  private TimeUnit units;

  @Before
  public void before() throws Exception {
    mockParameters = mock(FileControllerParameters.class);
    pid = identifyPid();
    timeout = 0;
    units = SECONDS;

    controller = new FileProcessController(mockParameters, pid, timeout, units);
  }

  @Test
  public void noParamsSpecified_throwsNullPointerException() throws Exception {
    pid = 0;

    assertThatThrownBy(() -> new FileProcessController(null))
        .isInstanceOf(NullPointerException.class)
        .hasMessage("Invalid parameters 'null' specified");
  }

  @Test
  public void pidLessThanOne_throwsIllegalArgumentException() throws Exception {
    pid = 0;

    assertThatThrownBy(() -> new FileProcessController(mockParameters, pid, timeout, units))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage("Invalid pid '" + pid + "' specified");
  }

  @Test
  public void getProcessId_returnsPid() throws Exception {
    assertThat(controller.getProcessId()).isEqualTo(pid);
  }

  @Test
  public void checkPidSupport_throwsAttachAPINotFoundException() throws Exception {
    assertThatThrownBy(() -> controller.checkPidSupport())
        .isInstanceOf(AttachAPINotFoundException.class);
  }

  @Test
  public void statusTimeoutMillis_defaultsToOneMinute() throws Exception {
    FileProcessController controller = new FileProcessController(mockParameters, pid);

    assertThat(controller.getStatusTimeoutMillis()).isEqualTo(DEFAULT_STATUS_TIMEOUT_MILLIS);
  }

  @Test
  public void timeoutLessThanZero_throwsIllegalArgumentException() throws Exception {
    timeout = -1;

    assertThatThrownBy(() -> new FileProcessController(mockParameters, pid, timeout, units))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage("Invalid timeout '" + timeout + "' specified");
  }
}
