telegraf/plugins/inputs/system/processes_test.go

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package system
import (
"fmt"
"runtime"
"testing"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestProcesses(t *testing.T) {
processes := &Processes{
execPS: execPS,
readProcFile: readProcFile,
}
var acc testutil.Accumulator
err := processes.Gather(&acc)
require.NoError(t, err)
assert.True(t, acc.HasIntField("processes", "running"))
assert.True(t, acc.HasIntField("processes", "sleeping"))
assert.True(t, acc.HasIntField("processes", "stopped"))
assert.True(t, acc.HasIntField("processes", "total"))
total, ok := acc.Get("processes")
require.True(t, ok)
assert.True(t, total.Fields["total"].(int64) > 0)
}
func TestFromPS(t *testing.T) {
processes := &Processes{
execPS: testExecPS,
forcePS: true,
}
var acc testutil.Accumulator
err := processes.Gather(&acc)
require.NoError(t, err)
fields := getEmptyFields()
fields["blocked"] = int64(1)
fields["running"] = int64(4)
fields["sleeping"] = int64(34)
fields["total"] = int64(39)
acc.AssertContainsTaggedFields(t, "processes", fields, map[string]string{})
}
func TestFromPSError(t *testing.T) {
processes := &Processes{
execPS: testExecPSError,
forcePS: true,
}
var acc testutil.Accumulator
err := processes.Gather(&acc)
require.Error(t, err)
}
func TestFromProcFiles(t *testing.T) {
if runtime.GOOS != "linux" {
t.Skip("This test only runs on linux")
}
tester := tester{}
processes := &Processes{
readProcFile: tester.testProcFile,
forceProc: true,
}
var acc testutil.Accumulator
err := processes.Gather(&acc)
require.NoError(t, err)
fields := getEmptyFields()
fields["sleeping"] = tester.calls
fields["total_threads"] = tester.calls * 2
fields["total"] = tester.calls
acc.AssertContainsTaggedFields(t, "processes", fields, map[string]string{})
}
func testExecPS() ([]byte, error) {
return []byte(testPSOut), nil
}
// struct for counting calls to testProcFile
type tester struct {
calls int64
}
func (t *tester) testProcFile(_ string) ([]byte, error) {
t.calls++
return []byte(fmt.Sprintf(testProcStat, "S", "2")), nil
}
func testExecPSError() ([]byte, error) {
return []byte(testPSOut), fmt.Errorf("ERROR!")
}
const testPSOut = `
STAT
S
S
S
S
R
R
S
S
Ss
Ss
S
SNs
Ss
Ss
S
R+
S
U
S
S
S
S
Ss
S+
Ss
S
S+
S+
Ss
S+
Ss
S
R+
Ss
S
S+
S+
Ss
S+
`
const testProcStat = `10 (rcuob/0) %s 2 0 0 0 -1 2129984 0 0 0 0 0 0 0 0 20 0 %s 0 11 0 0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 0 0 0 0 0 0 0 0 0 0 0 0 0 0
`