Add new tests to presubmit, fix errors

monitoring/go/prober/main.go

 // Prober is an HTTP prober that periodically sends out HTTP requests to specified
 // endpoints and reports if the returned results match the expectations. The results
 // of the probe, including latency, are recored in InfluxDB using the Carbon protocol.
 // See probers.json as an example of the config file format.
 package main
 
 import (
         "encoding/json"
         "flag"
         "fmt"
@@ skipping 249 matching lines @@
         }
         for _ = range time.Tick(*runEvery) {
                 for name, probe := range cfg {
                         glog.Infof("Probe: %s Starting fail value: %d", name, probe.failure.Value())
                         begin = time.Now()
                         if probe.Method == "GET" {
                                 resp, err = c.Get(probe.URL)
                         } else if probe.Method == "POST" {
                                 resp, err = c.Post(probe.URL, probe.MimeType, strings.NewReader(probe.Body))
                         } else {
-                                glog.Errorf("Error: unknown method: ", probe.Method)
+                                glog.Errorf("Error: unknown method: %s", probe.Method)
                                 continue
                         }
                         if err != nil {
                                 glog.Errorf("Failed to make request: Name: %s URL: %s Error: %s", name, probe.URL, err)
                                 probe.failure.Update(1)
                                 continue
                         }
                         bodyTestResults := true
                         if probe.bodyTest != nil && resp.Body != nil {
                                 bodyTestResults = probe.bodyTest(resp.Body)
@@ skipping 13 matching lines @@
                                 glog.Errorf("Body test failed. %#v", probe)
                                 probe.failure.Update(1)
                                 continue
                         }
 
                         probe.failure.Update(0)
                         probe.latency.Update(d)
                 }
         }
 }