package crunchstat
import (
- "bufio"
- "io"
+ "bytes"
"log"
"os"
"regexp"
+ "strconv"
"testing"
+ "time"
+
+ "github.com/sirupsen/logrus"
+ . "gopkg.in/check.v1"
)
-func bufLogger() (*log.Logger, *bufio.Reader) {
- r, w := io.Pipe()
- logger := log.New(w, "", 0)
- return logger, bufio.NewReader(r)
+func Test(t *testing.T) {
+ TestingT(t)
}
-func TestReadAllOrWarnFail(t *testing.T) {
- logger, rcv := bufLogger()
- rep := Reporter{Logger: logger}
+var _ = Suite(&suite{})
- done := make(chan bool)
- var msg []byte
- var err error
- go func() {
- msg, err = rcv.ReadBytes('\n')
- close(done)
- }()
- {
- // The special file /proc/self/mem can be opened for
- // reading, but reading from byte 0 returns an error.
- f, err := os.Open("/proc/self/mem")
- if err != nil {
- t.Fatalf("Opening /proc/self/mem: %s", err)
- }
- if x, err := rep.readAllOrWarn(f); err == nil {
- t.Fatalf("Expected error, got %v", x)
- }
- }
- <-done
- if err != nil {
- t.Fatal(err)
- } else if matched, err := regexp.MatchString("^warning: read /proc/self/mem: .*", string(msg)); err != nil || !matched {
- t.Fatalf("Expected error message about unreadable file, got \"%s\"", msg)
- }
+type suite struct{}
+
+func (s *suite) TestReadAllOrWarnFail(c *C) {
+ var logger bytes.Buffer
+ rep := Reporter{Logger: log.New(&logger, "", 0)}
+
+ // The special file /proc/self/mem can be opened for
+ // reading, but reading from byte 0 returns an error.
+ f, err := os.Open("/proc/self/mem")
+ c.Assert(err, IsNil)
+ defer f.Close()
+ _, err = rep.readAllOrWarn(f)
+ c.Check(err, NotNil)
+ c.Check(logger.String(), Matches, "^warning: read /proc/self/mem: .*\n")
}
-func TestReadAllOrWarnSuccess(t *testing.T) {
- rep := Reporter{Logger: log.New(os.Stderr, "", 0)}
+func (s *suite) TestReadAllOrWarnSuccess(c *C) {
+ var logbuf bytes.Buffer
+ rep := Reporter{Logger: log.New(&logbuf, "", 0)}
f, err := os.Open("./crunchstat_test.go")
- if err != nil {
- t.Fatalf("Opening ./crunchstat_test.go: %s", err)
- }
+ c.Assert(err, IsNil)
+ defer f.Close()
data, err := rep.readAllOrWarn(f)
- if err != nil {
- t.Fatalf("got error %s", err)
+ c.Check(err, IsNil)
+ c.Check(string(data), Matches, "(?ms).*\npackage crunchstat\n.*")
+ c.Check(logbuf.String(), Equals, "")
+}
+
+func (s *suite) TestReportPIDs(c *C) {
+ var logbuf bytes.Buffer
+ logger := logrus.New()
+ logger.Out = &logbuf
+ r := Reporter{
+ Logger: logger,
+ CgroupRoot: "/sys/fs/cgroup",
+ PollPeriod: time.Second,
}
- if matched, err := regexp.MatchString("\npackage crunchstat\n", string(data)); err != nil || !matched {
- t.Fatalf("data failed regexp: err %v, matched %v", err, matched)
+ r.Start()
+ r.ReportPID("init", 1)
+ r.ReportPID("test_process", os.Getpid())
+ r.ReportPID("nonexistent", 12345) // should be silently ignored/omitted
+ for deadline := time.Now().Add(10 * time.Second); ; time.Sleep(time.Millisecond) {
+ if time.Now().After(deadline) {
+ c.Error("timed out")
+ break
+ }
+ if m := regexp.MustCompile(`(?ms).*procmem \d+ init (\d+) test_process.*`).FindSubmatch(logbuf.Bytes()); len(m) > 0 {
+ size, err := strconv.ParseInt(string(m[1]), 10, 64)
+ c.Check(err, IsNil)
+ // Expect >1 MiB and <100 MiB -- otherwise we
+ // are probably misinterpreting /proc/N/stat
+ // or multiplying by the wrong page size.
+ c.Check(size > 1000000, Equals, true)
+ c.Check(size < 100000000, Equals, true)
+ break
+ }
}
+ c.Logf("%s", logbuf.String())
}