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|
//go:build linux
// +build linux
package memlimit
import (
"flag"
"math"
"os"
"runtime/debug"
"testing"
)
var (
cgVersion uint64
expected uint64
expectedSystem uint64
)
func TestMain(m *testing.M) {
flag.Uint64Var(&expected, "expected", 0, "Expected cgroup's memory limit")
flag.Uint64Var(&expectedSystem, "expected-system", 0, "Expected system memory limit")
flag.Uint64Var(&cgVersion, "cgroup-version", 2, "Cgroup version")
flag.Parse()
os.Exit(m.Run())
}
func TestSetGoMemLimit(t *testing.T) {
type args struct {
ratio float64
}
tests := []struct {
name string
args args
want int64
wantErr error
gomemlimit int64
skip bool
}{
{
name: "0.5",
args: args{
ratio: 0.5,
},
want: int64(float64(expected) * 0.5),
wantErr: nil,
gomemlimit: int64(float64(expected) * 0.5),
skip: expected == 0 || cgVersion == 0,
},
{
name: "0.9",
args: args{
ratio: 0.9,
},
want: int64(float64(expected) * 0.9),
wantErr: nil,
gomemlimit: int64(float64(expected) * 0.9),
skip: expected == 0 || cgVersion == 0,
},
{
name: "Unavailable",
args: args{
ratio: 0.9,
},
want: 0,
wantErr: ErrCgroupsNotSupported,
gomemlimit: math.MaxInt64,
skip: cgVersion != 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.skip {
t.Skip()
}
t.Cleanup(func() {
debug.SetMemoryLimit(math.MaxInt64)
})
got, err := SetGoMemLimit(tt.args.ratio)
if err != tt.wantErr {
t.Errorf("SetGoMemLimit() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("SetGoMemLimit() got = %v, want %v", got, tt.want)
}
if debug.SetMemoryLimit(-1) != tt.gomemlimit {
t.Errorf("debug.SetMemoryLimit(-1) got = %v, want %v", debug.SetMemoryLimit(-1), tt.gomemlimit)
}
})
}
}
func TestSetGoMemLimitWithProvider_WithCgroupProvider(t *testing.T) {
type args struct {
provider Provider
ratio float64
}
tests := []struct {
name string
args args
want int64
wantErr error
gomemlimit int64
skip bool
}{
{
name: "FromCgroup",
args: args{
provider: FromCgroup,
ratio: 0.9,
},
want: int64(float64(expected) * 0.9),
wantErr: nil,
gomemlimit: int64(float64(expected) * 0.9),
skip: expected == 0 || cgVersion == 0,
},
{
name: "FromCgroup_Unavailable",
args: args{
provider: FromCgroup,
ratio: 0.9,
},
want: 0,
wantErr: ErrNoCgroup,
gomemlimit: math.MaxInt64,
skip: expected == 0 || cgVersion != 0,
},
{
name: "FromCgroupV1",
args: args{
provider: FromCgroupV1,
ratio: 0.9,
},
want: int64(float64(expected) * 0.9),
wantErr: nil,
gomemlimit: int64(float64(expected) * 0.9),
skip: expected == 0 || cgVersion != 1,
},
{
name: "FromCgroupHybrid",
args: args{
provider: FromCgroupHybrid,
ratio: 0.9,
},
want: int64(float64(expected) * 0.9),
wantErr: nil,
gomemlimit: int64(float64(expected) * 0.9),
skip: expected == 0 || cgVersion != 1,
},
{
name: "FromCgroupV2",
args: args{
provider: FromCgroupV2,
ratio: 0.9,
},
want: int64(float64(expected) * 0.9),
wantErr: nil,
gomemlimit: int64(float64(expected) * 0.9),
skip: expected == 0 || cgVersion != 2,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.skip {
t.Skip()
}
t.Cleanup(func() {
debug.SetMemoryLimit(math.MaxInt64)
})
got, err := SetGoMemLimitWithProvider(tt.args.provider, tt.args.ratio)
if err != tt.wantErr {
t.Errorf("SetGoMemLimitWithProvider() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("SetGoMemLimitWithProvider() got = %v, want %v", got, tt.want)
}
if debug.SetMemoryLimit(-1) != tt.gomemlimit {
t.Errorf("debug.SetMemoryLimit(-1) got = %v, want %v", debug.SetMemoryLimit(-1), tt.gomemlimit)
}
})
}
}
func TestSetGoMemLimitWithProvider_WithSystemProvider(t *testing.T) {
type args struct {
provider Provider
ratio float64
}
tests := []struct {
name string
args args
want int64
wantErr error
gomemlimit int64
skip bool
}{
{
name: "FromSystem",
args: args{
provider: FromSystem,
ratio: 0.9,
},
want: int64(float64(expectedSystem) * 0.9),
wantErr: nil,
gomemlimit: int64(float64(expectedSystem) * 0.9),
skip: expectedSystem == 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.skip {
t.Skip()
}
t.Cleanup(func() {
debug.SetMemoryLimit(math.MaxInt64)
})
got, err := SetGoMemLimitWithProvider(tt.args.provider, tt.args.ratio)
if err != tt.wantErr {
t.Errorf("SetGoMemLimitWithProvider() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("SetGoMemLimitWithProvider() got = %v, want %v", got, tt.want)
}
if debug.SetMemoryLimit(-1) != tt.gomemlimit {
t.Errorf("debug.SetMemoryLimit(-1) got = %v, want %v", debug.SetMemoryLimit(-1), tt.gomemlimit)
}
})
}
}
|
