Add hokey test

- I'm just leaving this in here in case I need to debug this scenario
  again.

src/s3proxy/blob_cache/cache_suite_test.go

@@ -1 +1,13 @@
-package blob_cache
+package blob_cache_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+func TestBlobCache(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Blob Cache Suite")
+}

src/s3proxy/blob_cache/cache_test.go

@@ -1 +1,66 @@
-package blob_cache
+package blob_cache_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"io/ioutil"
+	"os"
+	"github.com/karlseguin/ccache"
+	"s3proxy/fakes"
+	"s3proxy/blob_cache"
+	"golang.org/x/net/context"
+	"s3proxy/context"
+	"s3proxy/source"
+	"time"
+	"sync"
+	"io"
+	"fmt"
+)
+
+var _ = Describe("Testing blob cache", func() {
+	Context("Sanity", func() {
+		It("Just works", func() {
+			cacheDir, err := ioutil.TempDir("", "cached-")
+			Expect(err).To(BeNil())
+			defer os.RemoveAll(cacheDir)
+
+			bc := ccache.Layered(ccache.Configure())
+			fus := fakes.NewFakeUpstreamSource(cacheDir, bc)
+			cache := blob_cache.NewS3Cache(bc, fus, cacheDir, 60)
+
+			meta := &source.Meta {
+				Size: 1,
+				Expires: time.Now(),
+			}
+
+			cache.AddMeta(meta, "/cached/1000000")
+
+			wg := sync.WaitGroup{}
+			wg.Add(3)
+
+			var i uint64
+			for i = 0; i < 3; i++ {
+				x := i
+				go func() {
+					ctx := context.WithValue(context.Background(), 0, &cache_context.Context{x})
+					r, _ := cache.Get(ctx, "/cached/1000000")
+					var err error
+					buf := make([]byte, 65536)
+					var total int
+					var n int
+					for {
+						n, err = r.Read(buf)
+						total += n
+						if err != nil && err == io.EOF {
+							fmt.Printf("err: %s\n", err)
+							break
+						}
+					}
+					fmt.Printf("[%d] --->>> read %d\n", x, total)
+					wg.Done()
+				}()
+			}
+			wg.Wait()
+		})
+	})
+})