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|
package prometheus
import (
"bytes"
"os"
"regexp"
"testing"
"github.com/prometheus/common/expfmt"
"github.com/prometheus/procfs"
)
func TestProcessCollector(t *testing.T) {
if _, err := procfs.Self(); err != nil {
t.Skipf("skipping TestProcessCollector, procfs not available: %s", err)
}
registry := NewRegistry()
if err := registry.Register(NewProcessCollector(os.Getpid(), "")); err != nil {
t.Fatal(err)
}
if err := registry.Register(NewProcessCollectorPIDFn(
func() (int, error) { return os.Getpid(), nil }, "foobar"),
); err != nil {
t.Fatal(err)
}
mfs, err := registry.Gather()
if err != nil {
t.Fatal(err)
}
var buf bytes.Buffer
for _, mf := range mfs {
if _, err := expfmt.MetricFamilyToText(&buf, mf); err != nil {
t.Fatal(err)
}
}
for _, re := range []*regexp.Regexp{
regexp.MustCompile("process_cpu_seconds_total [0-9]"),
regexp.MustCompile("process_max_fds [1-9]"),
regexp.MustCompile("process_open_fds [1-9]"),
regexp.MustCompile("process_virtual_memory_bytes [1-9]"),
regexp.MustCompile("process_resident_memory_bytes [1-9]"),
regexp.MustCompile("process_start_time_seconds [0-9.]{10,}"),
regexp.MustCompile("foobar_process_cpu_seconds_total [0-9]"),
regexp.MustCompile("foobar_process_max_fds [1-9]"),
regexp.MustCompile("foobar_process_open_fds [1-9]"),
regexp.MustCompile("foobar_process_virtual_memory_bytes [1-9]"),
regexp.MustCompile("foobar_process_resident_memory_bytes [1-9]"),
regexp.MustCompile("foobar_process_start_time_seconds [0-9.]{10,}"),
} {
if !re.Match(buf.Bytes()) {
t.Errorf("want body to match %s\n%s", re, buf.String())
}
}
}
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