Add new tests to presubmit, fix errors

perf/go/ingester/ingester_test.go

 package ingester
 
 import (
         "fmt"
         "io/ioutil"
         "os"
         "path/filepath"
         "runtime"
         "testing"
 
@@ skipping 19 matching lines @@
 
         // Create a temporary place for a filetilestore.
         tileDir, err := ioutil.TempDir("", "skiaperf")
         if err != nil {
                 t.Fatal("Failed to create testing Tile dir: ", err)
         }
         defer os.RemoveAll(tileDir)
 
         git, err := gitinfo.NewGitInfo(filepath.Join(tr.Dir, "testrepo"), false, false)
         if err != nil {
-                glog.Fatal("Failed loading Git info: %s\n", err)
+                glog.Fatalf("Failed loading Git info: %s\n", err)
         }
 
         // Construct an Ingestor and have it UpdateCommitInfo.
         i, err := NewIngester(git, tileDir, config.DATASET_NANO, NanoBenchIngestion, "", "")
         if err != nil {
                 t.Fatal("Failed to create ingester:", err)
         }
 
         if err := i.UpdateCommitInfo(false); err != nil {
                 t.Fatal("Failed to ingest commits:", err)
@@ skipping 105 matching lines @@
 
         benchData.Options["system"] = "Linux"
         addBenchDataToTile(benchData, tile, offset, metricsProcessed)
         if got, want := "Linux", tile.Traces[key].Params()["system"]; got != want {
                 t.Errorf("Failed to update params: Got %v Want %v", got, want)
         }
         if got, want := int64(27), metricsProcessed.Count(); got != want {
                 t.Errorf("Wrong number of points ingested: Got %v Want %v", got, want)
         }
 }