github.com/bigcommerce/nomad@v0.9.3-bc/client/stats/cpu_test.go (about)

     1  package stats
     2  
     3  import (
     4  	"math"
     5  	"os"
     6  	"testing"
     7  	"time"
     8  
     9  	shelpers "github.com/hashicorp/nomad/helper/stats"
    10  	"github.com/hashicorp/nomad/helper/testlog"
    11  	"github.com/stretchr/testify/assert"
    12  )
    13  
    14  func TestCpuStatsPercent(t *testing.T) {
    15  	cs := NewCpuStats()
    16  	cs.Percent(79.7)
    17  	time.Sleep(1 * time.Second)
    18  	percent := cs.Percent(80.69)
    19  	expectedPercent := 98.00
    20  	if percent < expectedPercent && percent > (expectedPercent+1.00) {
    21  		t.Fatalf("expected: %v, actual: %v", expectedPercent, percent)
    22  	}
    23  }
    24  
    25  func TestHostStats_CPU(t *testing.T) {
    26  	assert := assert.New(t)
    27  	assert.Nil(shelpers.Init())
    28  
    29  	logger := testlog.HCLogger(t)
    30  	cwd, err := os.Getwd()
    31  	assert.Nil(err)
    32  	hs := NewHostStatsCollector(logger, cwd, nil)
    33  
    34  	// Collect twice so we can calculate percents we need to generate some work
    35  	// so that the cpu values change
    36  	assert.Nil(hs.Collect())
    37  	total := 0
    38  	for i := 1; i < 1000000000; i++ {
    39  		total *= i
    40  		total = total % i
    41  	}
    42  	assert.Nil(hs.Collect())
    43  	stats := hs.Stats()
    44  
    45  	assert.NotZero(stats.CPUTicksConsumed)
    46  	assert.NotZero(len(stats.CPU))
    47  
    48  	for _, cpu := range stats.CPU {
    49  		assert.False(math.IsNaN(cpu.Idle))
    50  		assert.False(math.IsNaN(cpu.Total))
    51  		assert.False(math.IsNaN(cpu.System))
    52  		assert.False(math.IsNaN(cpu.User))
    53  
    54  		assert.False(math.IsInf(cpu.Idle, 0))
    55  		assert.False(math.IsInf(cpu.Total, 0))
    56  		assert.False(math.IsInf(cpu.System, 0))
    57  		assert.False(math.IsInf(cpu.User, 0))
    58  	}
    59  }