func TestRestoreFromDisk(t *testing.T) {
expected := "awesome"
up, cz, _, _ := setup()
ca := NewFakeCacheAlgorithm()
runtime.GOMAXPROCS(runtime.NumCPU())
up.addFakeResponse("/path",
fakeResponse{
Status: "200",
ResponseTime: 0,
Response: expected,
})
storage := New(cz, ca, newStdLogger())
defer os.RemoveAll(storage.path)
ctx := contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: up})
oid := types.ObjectID{
CacheKey: "1",
Path: "/path",
}
index := types.ObjectIndex{
ObjID: oid,
Part: 0,
}
ca.AddFakeReplies(index, FakeReplies{
Lookup: LookupFalse,
ShouldKeep: ShouldKeepTrue,
AddObject: AddObjectNil,
})
makeAndCheckGetFullFile(t, ctx, storage, oid, expected)
if err := storage.Close(); err != nil {
t.Errorf("Storage.Close() shouldn't have returned error\n%s", err)
}
ca.AddFakeReplies(index, FakeReplies{
Lookup: LookupTrue, // change to True now that we supposevely will read it from disk
ShouldKeep: ShouldKeepTrue,
AddObject: AddObjectNil,
})
coup := &countingUpstream{
fakeUpstream: up,
}
storage = New(cz, ca, newStdLogger())
ctx = contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: coup}) // upstream is nil so that if used a panic will be produced
makeAndCheckGetFullFile(t, ctx, storage, oid, expected)
if err := storage.Close(); err != nil {
t.Errorf("Storage.Close() shouldn't have returned error\n%s", err)
}
if coup.called != 0 {
t.Errorf("Storage should've not called even once upstream but it did %d times", coup.called)
}
}
func (app *Application) ServeHTTP(writer http.ResponseWriter, req *http.Request) {
vh := app.findVirtualHost(req)
if vh == nil {
http.NotFound(writer, req)
return
}
vh.Handler.RequestHandle(contexts.NewVhostContext(app.ctx, vh), writer, req, vh)
}
// Tests the storage headers map in multithreading usage. An error will be
// triggered by a race condition. This may or may not happen. So no failures
// in the test do not mean there are no problems. But it may catch an error
// from time to time. In fact it does quite often for me.
//
// Most of the time the test fails with a panic. And most of the time
// the panic is in the runtime. So isntead of a error message via t.Error
// the test fails with a panic.
func TestStorageHeadersFunctionWithManyGoroutines(t *testing.T) {
up, cz, ca, goroutines := setup()
pathFunc := func(i int) string {
return fmt.Sprintf("/%d", i)
}
headerKeyFunc := func(i int) string {
return fmt.Sprintf("X-Header-%d", i)
}
headerValueFunc := func(i int) string {
return fmt.Sprintf("value-%d", i)
}
// setup the response
for i := 0; i < 100; i++ {
var headers = make(http.Header)
headers.Add(headerKeyFunc(i), headerValueFunc(i))
up.addFakeResponse(pathFunc(i),
fakeResponse{
Status: "200",
ResponseTime: 10 * time.Nanosecond,
Headers: headers,
},
)
}
storage := New(cz, ca, newStdLogger())
defer storage.Close()
defer os.RemoveAll(storage.path)
ctx := contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: up})
concurrentTestHelper(t, goroutines, 100, func(t *testing.T, i, j int) {
oid := types.ObjectID{}
oid.CacheKey = "1"
oid.Path = pathFunc(i)
header, err := storage.Headers(ctx, oid)
if err != nil {
t.Errorf("Got error from storage.Headers on %d, %d: %s", j, i, err)
}
value := header.Get(headerKeyFunc(i))
if value != headerValueFunc(i) {
t.Errorf("Expected header [%s] to have value [%s] but it had value %s for %d, %d", headerKeyFunc(i), headerValueFunc(i), value, j, i)
}
})
}
func TestDiskCloseReturnesAfterFinishingRequests(t *testing.T) {
expected := "awesome"
fakeup, cz, ca, _ := setup()
runtime.GOMAXPROCS(runtime.NumCPU())
up := newBlockingUpstream(fakeup)
up.addFakeResponse("/path",
fakeResponse{
Status: "200",
ResponseTime: 0,
Response: expected,
})
storage := New(cz, ca, newStdLogger())
defer os.RemoveAll(storage.path)
ctx := contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: up})
wCh := make(chan struct{})
go func(ch chan struct{}) {
defer close(ch)
oid := types.ObjectID{}
oid.CacheKey = "1"
oid.Path = "/path"
resp, err := storage.GetFullFile(ctx, oid)
if err != nil {
t.Errorf("Got Error on a GetFullFile on closing storage:\n%s", err)
}
b, err := ioutil.ReadAll(resp)
if err != nil {
t.Errorf("Got Error on a ReadAll on an already closed storage:\n%s", err)
}
if string(b) != expected {
t.Errorf("Expected read from GetFullFile was %s but got %s", expected, string(b))
}
}(wCh)
go close(<-up.requestPartial)
err := storage.Close()
if err != nil {
t.Errorf("Storage.Close() shouldn't have returned error\n%s", err)
}
<-wCh
}
func TestStorageSimultaneousGets(t *testing.T) {
fakeup, cz, ca, goroutines := setup()
runtime.GOMAXPROCS(runtime.NumCPU())
up := &countingUpstream{
fakeUpstream: fakeup,
}
up.addFakeResponse("/path",
fakeResponse{
Status: "200",
ResponseTime: 10 * time.Millisecond,
Response: "awesome",
})
storage := New(cz, ca, newStdLogger())
defer storage.Close()
defer os.RemoveAll(storage.path)
ctx := contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: up})
concurrentTestHelper(t, goroutines, 1, func(t *testing.T, i, j int) {
oid := types.ObjectID{}
oid.CacheKey = "1"
oid.Path = "/path"
file, err := storage.GetFullFile(ctx, oid)
if err != nil {
t.Errorf("Got error from storage.Get on %d, %d: %s", j, i, err)
}
b, err := ioutil.ReadAll(file)
if err != nil {
t.Errorf("Got error while reading response on %d, %d: %s", j, i, err)
}
if string(b) != "awesome" {
t.Errorf("The response was expected to be 'awesome' but it was %s", string(b))
}
})
if up.called != 1 {
t.Errorf("Expected upstream.GetRequest to be called once it got called %d", up.called)
}
}
func TestDiskCloseReturnesAfterFinishingHeaders(t *testing.T) {
var expected = make(http.Header)
var expectedHeader, expectedValue = "awesome-header", "awesome-value"
expected.Add(expectedHeader, expectedValue)
fakeup, cz, ca, _ := setup()
runtime.GOMAXPROCS(runtime.NumCPU())
up := newBlockingUpstream(fakeup)
up.addFakeResponse("/path",
fakeResponse{
Status: "200",
ResponseTime: 0,
Headers: expected,
})
storage := New(cz, ca, newStdLogger())
defer os.RemoveAll(storage.path)
ctx := contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: up})
wCh := make(chan struct{})
go func(ch chan struct{}) {
defer close(ch)
oid := types.ObjectID{}
oid.CacheKey = "1"
oid.Path = "/path"
headers, err := storage.Headers(ctx, oid)
if err != nil {
t.Errorf("Got Error on a Headers on closing storage:\n%s", err)
}
if headers.Get(expectedHeader) != expectedValue { //!TODO: better check
t.Errorf("The returned headers:\n%s\n Did not match the expected headers\n%s", headers, expected)
}
}(wCh)
go close(<-up.requestHeader)
err := storage.Close()
if err != nil {
t.Errorf("Storage.Close() shouldn't have returned error\n%s", err)
}
<-wCh
}
func TestRestoreFromDisk2(t *testing.T) {
file_number := 64
expected := "awesome"
up, cz, _, _ := setup()
ca := NewFakeCacheAlgorithm()
ca.AddFakeReplies(types.ObjectIndex{}, FakeReplies{
Lookup: LookupFalse,
ShouldKeep: ShouldKeepTrue,
AddObject: AddObjectNil,
})
runtime.GOMAXPROCS(runtime.NumCPU())
for i := 0; i < file_number; i++ {
up.addFakeResponse(fmt.Sprintf("/path/%02d", i),
fakeResponse{
Status: "200",
ResponseTime: 0,
Response: expected,
})
}
storage := New(cz, ca, newStdLogger())
defer os.RemoveAll(storage.path)
ctx := contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: up})
for i := 0; i < file_number; i++ {
oid := types.ObjectID{
CacheKey: "1",
Path: fmt.Sprintf("/path/%02d", i),
}
makeAndCheckGetFullFile(t, ctx, storage, oid, expected)
}
if err := storage.Close(); err != nil {
t.Errorf("Storage.Close() shouldn't have returned error\n%s", err)
}
coup := &countingUpstream{
fakeUpstream: up,
}
var shouldKeepCount int32 = 0
ca.AddFakeReplies(types.ObjectIndex{}, FakeReplies{
Lookup: LookupTrue,
ShouldKeep: func(o types.ObjectIndex) bool {
atomic.AddInt32(&shouldKeepCount, 1)
return true
},
AddObject: AddObjectNil,
})
storage = New(cz, ca, newStdLogger())
if int(shouldKeepCount) != file_number {
t.Errorf("Algorithm.ShouldKeep should've been called for each file a total of %d but was called %d times.", file_number, shouldKeepCount)
}
ctx = contexts.NewVhostContext(context.Background(), &types.VirtualHost{Upstream: coup})
for i := 0; i < file_number; i++ {
oid := types.ObjectID{
CacheKey: "1",
Path: fmt.Sprintf("/path/%02d", i),
}
makeAndCheckGetFullFile(t, ctx, storage, oid, expected)
}
if err := storage.Close(); err != nil {
t.Errorf("Storage.Close() shouldn't have returned error\n%s", err)
}
if coup.called != 0 {
t.Errorf("Storage should've not called even once upstream but it did %d times", coup.called)
}
}
