chore(refactor): refactors go code (#2443)

internal/docker/calculation_test.go

@@ -0,0 +1,57 @@
+package docker
+
+import (
+	"github.com/docker/docker/api/types"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func Test_calculateMemUsageUnixNoCache(t *testing.T) {
+	type args struct {
+		mem types.MemoryStats
+	}
+	tests := []struct {
+		name string
+		args args
+		want float64
+	}{
+		{
+			name: "with cgroup v1",
+			args: args{
+				mem: types.MemoryStats{
+					Usage: 100,
+					Stats: map[string]uint64{
+						"total_inactive_file": 1,
+					},
+				},
+			},
+			want: 99,
+		},
+		{
+			name: "with cgroup v2",
+			args: args{
+				mem: types.MemoryStats{
+					Usage: 100,
+					Stats: map[string]uint64{
+						"inactive_file": 2,
+					},
+				},
+			},
+			want: 98,
+		},
+		{
+			name: "without cgroup",
+			args: args{
+				mem: types.MemoryStats{
+					Usage: 100,
+				},
+			},
+			want: 100,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equalf(t, tt.want, calculateMemUsageUnixNoCache(tt.args.mem), "calculateMemUsageUnixNoCache(%v)", tt.args.mem)
+		})
+	}
+}