telegraf/plugins/exec/exec_test.go

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2015-08-06 00:29:27 +00:00
package exec
import (
"fmt"
"github.com/influxdb/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"testing"
)
const validJson = `
{
"status": "green",
"num_processes": 82,
"cpu": {
"status": "red",
"nil_status": null,
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"used": 8234,
"free": 32
},
"percent": 0.81,
"users": [0, 1, 2, 3]
}`
const malformedJson = `
{
"status": "green",
`
type runnerMock struct {
out []byte
err error
}
func newRunnerMock(out []byte, err error) Runner {
return &runnerMock{out: out, err: err}
}
func (r runnerMock) Run(command string, args ...string) ([]byte, error) {
if r.err != nil {
return nil, r.err
}
return r.out, nil
}
func TestExec(t *testing.T) {
runner := newRunnerMock([]byte(validJson), nil)
command := Command{Command: "testcommand arg1", Name: "mycollector"}
e := &Exec{runner: runner, Commands: []*Command{&command}}
var acc testutil.Accumulator
err := e.Gather(&acc)
require.NoError(t, err)
checkFloat := []struct {
name string
value float64
}{
{"mycollector_num_processes", 82},
{"mycollector_cpu_used", 8234},
{"mycollector_cpu_free", 32},
{"mycollector_percent", 0.81},
}
for _, c := range checkFloat {
assert.True(t, acc.CheckValue(c.name, c.value))
}
assert.Equal(t, len(acc.Points), 4, "non-numeric measurements should be ignored")
}
func TestExecMalformed(t *testing.T) {
runner := newRunnerMock([]byte(malformedJson), nil)
command := Command{Command: "badcommand arg1", Name: "mycollector"}
e := &Exec{runner: runner, Commands: []*Command{&command}}
var acc testutil.Accumulator
err := e.Gather(&acc)
require.Error(t, err)
}
func TestCommandError(t *testing.T) {
runner := newRunnerMock(nil, fmt.Errorf("exit status code 1"))
command := Command{Command: "badcommand", Name: "mycollector"}
e := &Exec{runner: runner, Commands: []*Command{&command}}
var acc testutil.Accumulator
err := e.Gather(&acc)
require.Error(t, err)
}