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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package control
import (
"testing"
"gvisor.dev/gvisor/pkg/log"
ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time"
"gvisor.dev/gvisor/pkg/sentry/usage"
)
func init() {
log.SetLevel(log.Debug)
}
// Tests that ProcessData.Table() prints with the correct format.
func TestProcessListTable(t *testing.T) {
testCases := []struct {
pl []*Process
expected string
}{
{
pl: []*Process{},
expected: "UID PID PPID C STIME TIME CMD",
},
{
pl: []*Process{
{
UID: 0,
PID: 0,
PPID: 0,
C: 0,
STime: "0",
Time: "0",
Cmd: "zero",
},
{
UID: 1,
PID: 1,
PPID: 1,
C: 1,
STime: "1",
Time: "1",
Cmd: "one",
},
},
expected: `UID PID PPID C STIME TIME CMD
0 0 0 0 0 0 zero
1 1 1 1 1 1 one`,
},
}
for _, tc := range testCases {
output := ProcessListToTable(tc.pl)
if tc.expected != output {
t.Errorf("PrintTable(%v): got:\n%s\nwant:\n%s", tc.pl, output, tc.expected)
}
}
}
func TestProcessListJSON(t *testing.T) {
testCases := []struct {
pl []*Process
expected string
}{
{
pl: []*Process{},
expected: "[]",
},
{
pl: []*Process{
{
UID: 0,
PID: 0,
PPID: 0,
C: 0,
STime: "0",
Time: "0",
Cmd: "zero",
},
{
UID: 1,
PID: 1,
PPID: 1,
C: 1,
STime: "1",
Time: "1",
Cmd: "one",
},
},
expected: "[0,1]",
},
}
for _, tc := range testCases {
output, err := PrintPIDsJSON(tc.pl)
if err != nil {
t.Errorf("failed to generate JSON: %v", err)
}
if tc.expected != output {
t.Errorf("PrintJSON(%v): got:\n%s\nwant:\n%s", tc.pl, output, tc.expected)
}
}
}
func TestPercentCPU(t *testing.T) {
testCases := []struct {
stats usage.CPUStats
startTime ktime.Time
now ktime.Time
expected int32
}{
{
// Verify that 100% use is capped at 99.
stats: usage.CPUStats{UserTime: 1e9, SysTime: 1e9},
startTime: ktime.FromNanoseconds(7e9),
now: ktime.FromNanoseconds(9e9),
expected: 99,
},
{
// Verify that if usage > lifetime, we get at most 99%
// usage.
stats: usage.CPUStats{UserTime: 2e9, SysTime: 2e9},
startTime: ktime.FromNanoseconds(7e9),
now: ktime.FromNanoseconds(9e9),
expected: 99,
},
{
// Verify that 50% usage is reported correctly.
stats: usage.CPUStats{UserTime: 1e9, SysTime: 1e9},
startTime: ktime.FromNanoseconds(12e9),
now: ktime.FromNanoseconds(16e9),
expected: 50,
},
{
// Verify that 0% usage is reported correctly.
stats: usage.CPUStats{UserTime: 0, SysTime: 0},
startTime: ktime.FromNanoseconds(12e9),
now: ktime.FromNanoseconds(14e9),
expected: 0,
},
}
for _, tc := range testCases {
if pcpu := percentCPU(tc.stats, tc.startTime, tc.now); pcpu != tc.expected {
t.Errorf("percentCPU(%v, %v, %v): got %d, want %d", tc.stats, tc.startTime, tc.now, pcpu, tc.expected)
}
}
}
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