/*
    * Copyright 2021-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.linux.proc;
   
   import static org.hamcrest.MatcherAssert.assertThat;
   import static org.hamcrest.Matchers.greaterThanOrEqualTo;
   
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.condition.EnabledOnOs;
  import org.junit.jupiter.api.condition.OS;
  
  import oshi.SystemInfo;
  import oshi.hardware.CentralProcessor;
  import oshi.hardware.HardwareAbstractionLayer;
  
  @EnabledOnOs(OS.LINUX)
  class CpuStatTest {
  
      @Test
      void testSystemCpuLoadTicks() {
          long[] systemCpuLoadTicks = CpuStat.getSystemCpuLoadTicks();
          for (long systemCpuTick : systemCpuLoadTicks) {
              assertThat("CPU tick should be greater than or equal to 0", systemCpuTick, greaterThanOrEqualTo(0L));
          }
      }
  
      @Test
      void testGetProcessorCpuLoadTicks() {
          SystemInfo si = new SystemInfo();
          HardwareAbstractionLayer hal = si.getHardware();
          CentralProcessor processor = hal.getProcessor();
          int logicalProcessorCount = processor.getLogicalProcessorCount();
          long[][] processorCpuLoadTicks = CpuStat.getProcessorCpuLoadTicks(logicalProcessorCount);
          for (long[] cpuTicks : processorCpuLoadTicks) {
              for (long cpuTick : cpuTicks) {
                  assertThat("CPU tick should be greater than or equal to 0", cpuTick, greaterThanOrEqualTo(0L));
              }
          }
      }
  
      @Test
      void testGetContextSwitches() {
          assertThat("Context switches should be greater than or equal to -1", CpuStat.getContextSwitches(),
                  greaterThanOrEqualTo(-1L));
      }
  
      @Test
      void testGetInterrupts() {
          assertThat("Interrupts should be greater than or equal to -1", CpuStat.getInterrupts(),
                  greaterThanOrEqualTo(-1L));
      }
  
      @Test
      void testGetBootTime() {
          assertThat("Boot time should be greater than or equal to 0", CpuStat.getBootTime(), greaterThanOrEqualTo(0L));
      }
  }