github.com/AliyunContainerService/cli@v0.0.0-20181009023821-814ced4b30d0/cli/command/container/stats_helpers_test.go (about)

     1  package container
     2  
     3  import (
     4  	"fmt"
     5  	"testing"
     6  
     7  	"github.com/docker/docker/api/types"
     8  	"gotest.tools/assert"
     9  )
    10  
    11  func TestCalculateMemUsageUnixNoCache(t *testing.T) {
    12  	// Given
    13  	stats := types.MemoryStats{Usage: 500, Stats: map[string]uint64{"cache": 400}}
    14  
    15  	// When
    16  	result := calculateMemUsageUnixNoCache(stats)
    17  
    18  	// Then
    19  	assert.Assert(t, inDelta(100.0, result, 1e-6))
    20  }
    21  
    22  func TestCalculateMemPercentUnixNoCache(t *testing.T) {
    23  	// Given
    24  	someLimit := float64(100.0)
    25  	noLimit := float64(0.0)
    26  	used := float64(70.0)
    27  
    28  	// When and Then
    29  	t.Run("Limit is set", func(t *testing.T) {
    30  		result := calculateMemPercentUnixNoCache(someLimit, used)
    31  		assert.Assert(t, inDelta(70.0, result, 1e-6))
    32  	})
    33  	t.Run("No limit, no cgroup data", func(t *testing.T) {
    34  		result := calculateMemPercentUnixNoCache(noLimit, used)
    35  		assert.Assert(t, inDelta(0.0, result, 1e-6))
    36  	})
    37  }
    38  
    39  func inDelta(x, y, delta float64) func() (bool, string) {
    40  	return func() (bool, string) {
    41  		diff := x - y
    42  		if diff < -delta || diff > delta {
    43  			return false, fmt.Sprintf("%f != %f within %f", x, y, delta)
    44  		}
    45  		return true, ""
    46  	}
    47  }