Log hit and miss file and byte counts from exparchive.

client/cmd/isolate/checker_test.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package main
 
 import (
         "errors"
         "fmt"
         "sync"
@@ skipping 83 matching lines @@
         }
 
         // Check that the items/push states pairs match what the service gave.
         for got := range gotc {
                 gotPS, wantPS := got.ps, fake.pushStates[string(got.item.Digest)]
                 if gotPS != wantPS {
                         t.Errorf("push state for item %v wrong", got.item)
                         break
                 }
         }
+
+        if got, want := checker.Hit.Count, 0; got != want {
+                t.Errorf("checker hit count: got %v ; want: %v", got, want)
+        }
+        if got, want := checker.Miss.Count, 150; got != want {
+                t.Errorf("checker hit count: got %v ; want: %v", got, want)
+        }
 }
 
 func TestCheckerDelay(t *testing.T) {
         batchc := make(chan []*service.HandlersEndpointsV1Digest, 2)
         fake := &fakeIsolateService{batchc: batchc}
         checker := newChecker(fake)
 
         nop := func(item *Item, ps *isolatedclient.PushState) {}
         checker.AddItem(&Item{Digest: "aaa"}, false, nop)
         checker.AddItem(&Item{Digest: "bbb"}, false, nop)
@@ skipping 32 matching lines @@
                         Path:   fmt.Sprintf("/item/%d", i),
                         Digest: isolated.HexDigest(fmt.Sprintf("digest%d", i)),
                 }
                 checker.AddItem(item, false, nop)
         }
 
         if err := checker.Close(); err != errBang {
                 t.Fatalf("checker.Close: got error %v; want %v", err, errBang)
         }
 }