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.Deliver() 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()) } } }