Fix float64 comparison in stats_helpers_test.go

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

cli/command/container/stats_helpers_test.go

@@ -1,8 +1,10 @@
 package container
 
 import (
-	"github.com/docker/docker/api/types"
 	"testing"
+
+	"github.com/docker/docker/api/types"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestCalculateMemUsageUnixNoCache(t *testing.T) {
@@ -13,9 +15,7 @@ func TestCalculateMemUsageUnixNoCache(t *testing.T) {
 	result := calculateMemUsageUnixNoCache(stats)
 
 	// Then
-	if result != 100 {
-		t.Errorf("mem = %d, want 100", result)
-	}
+	assert.InDelta(t, 100.0, result, 1e-6)
 }
 
 func TestCalculateMemPercentUnixNoCache(t *testing.T) {
@@ -27,16 +27,10 @@ func TestCalculateMemPercentUnixNoCache(t *testing.T) {
 	// When and Then
 	t.Run("Limit is set", func(t *testing.T) {
 		result := calculateMemPercentUnixNoCache(someLimit, used)
-		expected := float64(70.0)
-		if result != expected {
-			t.Errorf("percent = %f, want %f", result, expected)
-		}
+		assert.InDelta(t, 70.0, result, 1e-6)
 	})
 	t.Run("No limit, no cgroup data", func(t *testing.T) {
 		result := calculateMemPercentUnixNoCache(noLimit, used)
-		expected := float64(0.0)
-		if result != expected {
-			t.Errorf("percent = %f, want %f", result, expected)
-		}
+		assert.InDelta(t, 0.0, result, 1e-6)
 	})
 }