func ExampleFilterRDS() {
// Set up your context using a base service implementation (memory or prod)
c := memory.Use(context.Background())
// Apply the counter.FilterRDS
c, counter := FilterRDS(c)
// functions use ds from the context like normal... they don't need to know
// that there are any filters at all.
someCalledFunc := func(c context.Context) {
ds := datastore.Get(c)
vals := []datastore.PropertyMap{{
"FieldName": {datastore.MkProperty(100)},
"$key": {datastore.MkProperty(ds.NewKey("Kind", "", 1, nil))}},
}
if err := ds.PutMulti(vals); err != nil {
panic(err)
}
}
// Using the other function.
someCalledFunc(c)
someCalledFunc(c)
// Then we can see what happened!
fmt.Printf("%d\n", counter.PutMulti.Successes())
// Output:
// 2
}
func toBytesErr(i interface{}, ctx KeyContext) (ret []byte, err error) {
buf := bytes.Buffer{}
switch t := i.(type) {
case ds.IndexColumn:
err = WriteIndexColumn(&buf, t)
case ds.IndexDefinition:
err = WriteIndexDefinition(&buf, t)
case ds.KeyTok:
err = WriteKeyTok(&buf, t)
case ds.Property:
err = WriteIndexProperty(&buf, ctx, t)
case ds.PropertyMap:
err = WritePropertyMap(&buf, ctx, t)
default:
_, v := ds.MkProperty(i).IndexTypeAndValue()
err = writeIndexValue(&buf, ctx, v)
}
if err == nil {
ret = buf.Bytes()
}
return
}
// PropertyMapPartially turns a regular PropertyMap into a SerializedPmap.
// Essentially all the []Property's become SerializedPslice, using cmpbin and
// datastore/serialize's encodings.
func PropertyMapPartially(k *ds.Key, pm ds.PropertyMap) (ret SerializedPmap) {
ret = make(SerializedPmap, len(pm)+2)
if k != nil {
ret["__key__"] = [][]byte{ToBytes(ds.MkProperty(k))}
for k != nil {
ret["__ancestor__"] = append(ret["__ancestor__"], ToBytes(ds.MkProperty(k)))
k = k.Parent()
}
}
for k, vals := range pm {
newVals := PropertySlice(vals)
if len(newVals) > 0 {
ret[k] = newVals
}
}
return
}
{"silly inequality (=> v <=)",
nq().Gte("bob", 10).Lte("bob", 10),
nil, nil},
{"cursors get smooshed into the inquality range",
(nq().Gt("Foo", 3).Lt("Foo", 10).
Start(curs("Foo", 2, "__key__", key("Something", 1))).
End(curs("Foo", 20, "__key__", key("Something", 20)))),
nil,
&reducedQuery{
"dev~app", "ns", "Foo", map[string]stringset.Set{}, []dstore.IndexColumn{
{Property: "Foo"},
{Property: "__key__"},
},
increment(serialize.ToBytes(dstore.MkProperty(3))),
serialize.ToBytes(dstore.MkProperty(10)),
2,
}},
{"cursors could cause the whole query to be useless",
(nq().Gt("Foo", 3).Lt("Foo", 10).
Start(curs("Foo", 200, "__key__", key("Something", 1))).
End(curs("Foo", 1, "__key__", key("Something", 20)))),
dstore.ErrNullQuery,
nil},
}
func TestQueries(t *testing.T) {
t.Parallel()
func TestCount(t *testing.T) {
t.Parallel()
Convey("Test Count filter", t, func() {
c, fb := featureBreaker.FilterRDS(memory.Use(context.Background()), nil)
c, ctr := FilterRDS(c)
So(c, ShouldNotBeNil)
So(ctr, ShouldNotBeNil)
ds := datastore.Get(c)
vals := []datastore.PropertyMap{{
"Val": {datastore.MkProperty(100)},
"$key": {datastore.MkPropertyNI(ds.NewKey("Kind", "", 1, nil))},
}}
Convey("Calling a ds function should reflect in counter", func() {
So(ds.PutMulti(vals), ShouldBeNil)
So(ctr.PutMulti.Successes(), ShouldEqual, 1)
Convey("effects are cumulative", func() {
So(ds.PutMulti(vals), ShouldBeNil)
So(ctr.PutMulti.Successes(), ShouldEqual, 2)
Convey("even within transactions", func() {
die(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
So(ds.PutMulti(append(vals, vals[0])), ShouldBeNil)
return nil
}, nil))
})
})
})
Convey("errors count against errors", func() {
fb.BreakFeatures(nil, "GetMulti")
So(ds.GetMulti(vals), ShouldErrLike, `"GetMulti" is broken`)
So(ctr.GetMulti.Errors(), ShouldEqual, 1)
fb.UnbreakFeatures("GetMulti")
So(ds.PutMulti(vals), ShouldBeNil)
die(ds.GetMulti(vals))
So(ctr.GetMulti.Errors(), ShouldEqual, 1)
So(ctr.GetMulti.Successes(), ShouldEqual, 1)
So(ctr.GetMulti.Total(), ShouldEqual, 2)
})
})
Convey("works for memcache", t, func() {
c, ctr := FilterMC(memory.Use(context.Background()))
So(c, ShouldNotBeNil)
So(ctr, ShouldNotBeNil)
mc := memcache.Get(c)
die(mc.Set(mc.NewItem("hello").SetValue([]byte("sup"))))
_, err := mc.Get("Wat")
So(err, ShouldNotBeNil)
_, err = mc.Get("hello")
die(err)
So(ctr.SetMulti, shouldHaveSuccessesAndErrors, 1, 0)
So(ctr.GetMulti, shouldHaveSuccessesAndErrors, 2, 0)
So(ctr.NewItem, shouldHaveSuccessesAndErrors, 3, 0)
})
Convey("works for taskqueue", t, func() {
c, ctr := FilterTQ(memory.Use(context.Background()))
So(c, ShouldNotBeNil)
So(ctr, ShouldNotBeNil)
tq := taskqueue.Get(c)
die(tq.Add(&taskqueue.Task{Name: "wat"}, ""))
So(tq.Add(&taskqueue.Task{Name: "wat"}, "DNE_QUEUE"),
ShouldErrLike, "UNKNOWN_QUEUE")
So(ctr.AddMulti, shouldHaveSuccessesAndErrors, 1, 1)
})
Convey("works for global info", t, func() {
c, fb := featureBreaker.FilterGI(memory.Use(context.Background()), nil)
c, ctr := FilterGI(c)
So(c, ShouldNotBeNil)
So(ctr, ShouldNotBeNil)
gi := info.Get(c)
_, err := gi.Namespace("foo")
die(err)
fb.BreakFeatures(nil, "Namespace")
_, err = gi.Namespace("boom")
So(err, ShouldErrLike, `"Namespace" is broken`)
So(ctr.Namespace, shouldHaveSuccessesAndErrors, 1, 1)
})
Convey("works for user", t, func() {
c, fb := featureBreaker.FilterUser(memory.Use(context.Background()), nil)
c, ctr := FilterUser(c)
So(c, ShouldNotBeNil)
So(ctr, ShouldNotBeNil)
u := user.Get(c)
_, err := u.CurrentOAuth("foo")
die(err)
fb.BreakFeatures(nil, "CurrentOAuth")
_, err = u.CurrentOAuth("foo")
So(err, ShouldErrLike, `"CurrentOAuth" is broken`)
So(ctr.CurrentOAuth, shouldHaveSuccessesAndErrors, 1, 1)
})
Convey("works for mail", t, func() {
c, fb := featureBreaker.FilterMail(memory.Use(context.Background()), nil)
c, ctr := FilterMail(c)
So(c, ShouldNotBeNil)
So(ctr, ShouldNotBeNil)
m := mail.Get(c)
err := m.Send(&mail.Message{
Sender: "*****@*****.**",
To: []string{"*****@*****.**"},
Body: "hi",
})
die(err)
fb.BreakFeatures(nil, "Send")
err = m.Send(&mail.Message{
Sender: "*****@*****.**",
To: []string{"*****@*****.**"},
Body: "hi",
})
So(err, ShouldErrLike, `"Send" is broken`)
So(ctr.Send, shouldHaveSuccessesAndErrors, 1, 1)
})
}
func TestDSCache(t *testing.T) {
t.Parallel()
zeroTime, err := time.Parse("2006-01-02T15:04:05.999999999Z", "2006-01-02T15:04:05.999999999Z")
if err != nil {
panic(err)
}
Convey("Test dscache", t, func() {
c := mathrand.Set(context.Background(), rand.New(rand.NewSource(1)))
clk := testclock.New(zeroTime)
c = clock.Set(c, clk)
c = memory.Use(c)
dsUnder := datastore.Get(c)
mc := memcache.Get(c)
shardsForKey := func(k *datastore.Key) int {
last := k.LastTok()
if last.Kind == "shardObj" {
return int(last.IntID)
}
if last.Kind == "noCacheObj" {
return 0
}
return DefaultShards
}
numMemcacheItems := func() uint64 {
stats, err := mc.Stats()
So(err, ShouldBeNil)
return stats.Items
}
Convey("enabled cases", func() {
c = FilterRDS(c, shardsForKey)
ds := datastore.Get(c)
So(dsUnder, ShouldNotBeNil)
So(ds, ShouldNotBeNil)
So(mc, ShouldNotBeNil)
Convey("basically works", func() {
pm := datastore.PropertyMap{
"BigData": {datastore.MkProperty([]byte(""))},
"Value": {datastore.MkProperty("hi")},
}
encoded := append([]byte{0}, serialize.ToBytes(pm)...)
o := object{ID: 1, Value: "hi"}
So(ds.Put(&o), ShouldBeNil)
o = object{ID: 1}
So(dsUnder.Get(&o), ShouldBeNil)
So(o.Value, ShouldEqual, "hi")
itm, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&o)))
So(err, ShouldEqual, memcache.ErrCacheMiss)
o = object{ID: 1}
So(ds.Get(&o), ShouldBeNil)
So(o.Value, ShouldEqual, "hi")
itm, err = mc.Get(itm.Key())
So(err, ShouldBeNil)
So(itm.Value(), ShouldResemble, encoded)
Convey("now we don't need the datastore!", func() {
o := object{ID: 1}
// delete it, bypassing the cache filter. Don't do this in production
// unless you want a crappy cache.
So(dsUnder.Delete(ds.KeyForObj(&o)), ShouldBeNil)
itm, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&o)))
So(err, ShouldBeNil)
So(itm.Value(), ShouldResemble, encoded)
So(ds.Get(&o), ShouldBeNil)
So(o.Value, ShouldEqual, "hi")
})
Convey("deleting it properly records that fact, however", func() {
o := object{ID: 1}
So(ds.Delete(ds.KeyForObj(&o)), ShouldBeNil)
itm, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&o)))
So(err, ShouldEqual, memcache.ErrCacheMiss)
So(ds.Get(&o), ShouldEqual, datastore.ErrNoSuchEntity)
itm, err = mc.Get(itm.Key())
So(err, ShouldBeNil)
So(itm.Value(), ShouldResemble, []byte{})
// this one hits memcache
So(ds.Get(&o), ShouldEqual, datastore.ErrNoSuchEntity)
})
})
Convey("compression works", func() {
o := object{ID: 2, Value: `¯\_(ツ)_/¯`}
data := make([]byte, 4000)
for i := range data {
const alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()"
data[i] = alpha[i%len(alpha)]
}
o.BigData = data
So(ds.Put(&o), ShouldBeNil)
So(ds.Get(&o), ShouldBeNil)
itm, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&o)))
So(err, ShouldBeNil)
So(itm.Value()[0], ShouldEqual, ZlibCompression)
So(len(itm.Value()), ShouldEqual, 653) // a bit smaller than 4k
// ensure the next Get comes from the cache
So(dsUnder.Delete(ds.KeyForObj(&o)), ShouldBeNil)
o = object{ID: 2}
So(ds.Get(&o), ShouldBeNil)
So(o.Value, ShouldEqual, `¯\_(ツ)_/¯`)
So(o.BigData, ShouldResemble, data)
})
Convey("transactions", func() {
Convey("work", func() {
// populate an object @ ID1
So(ds.Put(&object{ID: 1, Value: "something"}), ShouldBeNil)
So(ds.Get(&object{ID: 1}), ShouldBeNil)
So(ds.Put(&object{ID: 2, Value: "nurbs"}), ShouldBeNil)
So(ds.Get(&object{ID: 2}), ShouldBeNil)
// memcache now has the wrong value (simulated race)
So(dsUnder.Put(&object{ID: 1, Value: "else"}), ShouldBeNil)
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
o := &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "else")
o.Value = "txn"
So(ds.Put(o), ShouldBeNil)
So(ds.Delete(ds.KeyForObj(&object{ID: 2})), ShouldBeNil)
return nil
}, &datastore.TransactionOptions{XG: true}), ShouldBeNil)
_, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&object{ID: 1})))
So(err, ShouldEqual, memcache.ErrCacheMiss)
_, err = mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&object{ID: 2})))
So(err, ShouldEqual, memcache.ErrCacheMiss)
o := &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "txn")
})
Convey("errors don't invalidate", func() {
// populate an object @ ID1
So(ds.Put(&object{ID: 1, Value: "something"}), ShouldBeNil)
So(ds.Get(&object{ID: 1}), ShouldBeNil)
So(numMemcacheItems(), ShouldEqual, 1)
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
o := &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "something")
o.Value = "txn"
So(ds.Put(o), ShouldBeNil)
return errors.New("OH NOES")
}, nil).Error(), ShouldContainSubstring, "OH NOES")
// memcache still has the original
So(numMemcacheItems(), ShouldEqual, 1)
So(dsUnder.Delete(ds.KeyForObj(&object{ID: 1})), ShouldBeNil)
o := &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "something")
})
})
Convey("control", func() {
Convey("per-model bypass", func() {
type model struct {
ID string `gae:"$id"`
UseDSCache datastore.Toggle `gae:"$dscache.enable,false"`
Value string
}
itms := []model{
{ID: "hi", Value: "something"},
{ID: "there", Value: "else", UseDSCache: datastore.On},
}
So(ds.PutMulti(itms), ShouldBeNil)
So(ds.GetMulti(itms), ShouldBeNil)
So(numMemcacheItems(), ShouldEqual, 1)
})
Convey("per-key shard count", func() {
s := &shardObj{ID: 4, Value: "hi"}
So(ds.Put(s), ShouldBeNil)
So(ds.Get(s), ShouldBeNil)
So(numMemcacheItems(), ShouldEqual, 1)
for i := 0; i < 20; i++ {
So(ds.Get(s), ShouldBeNil)
}
So(numMemcacheItems(), ShouldEqual, 4)
})
Convey("per-key cache disablement", func() {
n := &noCacheObj{ID: "nurbs", Value: true}
So(ds.Put(n), ShouldBeNil)
So(ds.Get(n), ShouldBeNil)
So(numMemcacheItems(), ShouldEqual, 0)
})
Convey("per-model expiration", func() {
type model struct {
ID int64 `gae:"$id"`
DSCacheExp int64 `gae:"$dscache.expiration,7"`
Value string
}
So(ds.Put(&model{ID: 1, Value: "mooo"}), ShouldBeNil)
So(ds.Get(&model{ID: 1}), ShouldBeNil)
itm, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(&model{ID: 1})))
So(err, ShouldBeNil)
clk.Add(10 * time.Second)
_, err = mc.Get(itm.Key())
So(err, ShouldEqual, memcache.ErrCacheMiss)
})
})
Convey("screw cases", func() {
Convey("memcache contains bogus value (simulated failed AddMulti)", func() {
o := &object{ID: 1, Value: "spleen"}
So(ds.Put(o), ShouldBeNil)
sekret := []byte("I am a banana")
itm := mc.NewItem(MakeMemcacheKey(0, ds.KeyForObj(o))).SetValue(sekret)
So(mc.Set(itm), ShouldBeNil)
o = &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "spleen")
itm, err := mc.Get(itm.Key())
So(err, ShouldBeNil)
So(itm.Flags(), ShouldEqual, ItemUKNONWN)
So(itm.Value(), ShouldResemble, sekret)
})
Convey("memcache contains bogus value (corrupt entry)", func() {
o := &object{ID: 1, Value: "spleen"}
So(ds.Put(o), ShouldBeNil)
sekret := []byte("I am a banana")
itm := (mc.NewItem(MakeMemcacheKey(0, ds.KeyForObj(o))).
SetValue(sekret).
SetFlags(uint32(ItemHasData)))
So(mc.Set(itm), ShouldBeNil)
o = &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "spleen")
itm, err := mc.Get(itm.Key())
So(err, ShouldBeNil)
So(itm.Flags(), ShouldEqual, ItemHasData)
So(itm.Value(), ShouldResemble, sekret)
})
Convey("other entity has the lock", func() {
o := &object{ID: 1, Value: "spleen"}
So(ds.Put(o), ShouldBeNil)
sekret := []byte("r@vmarod!#)%9T")
itm := (mc.NewItem(MakeMemcacheKey(0, ds.KeyForObj(o))).
SetValue(sekret).
SetFlags(uint32(ItemHasLock)))
So(mc.Set(itm), ShouldBeNil)
o = &object{ID: 1}
So(ds.Get(o), ShouldBeNil)
So(o.Value, ShouldEqual, "spleen")
itm, err := mc.Get(itm.Key())
So(err, ShouldBeNil)
So(itm.Flags(), ShouldEqual, ItemHasLock)
So(itm.Value(), ShouldResemble, sekret)
})
Convey("massive entities can't be cached", func() {
o := &object{ID: 1, Value: "spleen"}
mr := mathrand.Get(c)
numRounds := (internalValueSizeLimit / 8) * 2
buf := bytes.Buffer{}
for i := 0; i < numRounds; i++ {
So(binary.Write(&buf, binary.LittleEndian, mr.Int63()), ShouldBeNil)
}
o.BigData = buf.Bytes()
So(ds.Put(o), ShouldBeNil)
o.BigData = nil
So(ds.Get(o), ShouldBeNil)
itm, err := mc.Get(MakeMemcacheKey(0, ds.KeyForObj(o)))
So(err, ShouldBeNil)
// Is locked until the next put, forcing all access to the datastore.
So(itm.Value(), ShouldResemble, []byte{})
So(itm.Flags(), ShouldEqual, ItemHasLock)
o.BigData = []byte("hi :)")
So(ds.Put(o), ShouldBeNil)
So(ds.Get(o), ShouldBeNil)
itm, err = mc.Get(itm.Key())
So(err, ShouldBeNil)
So(itm.Flags(), ShouldEqual, ItemHasData)
})
Convey("failure on Setting memcache locks is a hard stop", func() {
c, fb := featureBreaker.FilterMC(c, nil)
fb.BreakFeatures(nil, "SetMulti")
ds := datastore.Get(c)
So(ds.Put(&object{ID: 1}).Error(), ShouldContainSubstring, "SetMulti")
})
Convey("failure on Setting memcache locks in a transaction is a hard stop", func() {
c, fb := featureBreaker.FilterMC(c, nil)
fb.BreakFeatures(nil, "SetMulti")
ds := datastore.Get(c)
So(ds.RunInTransaction(func(c context.Context) error {
So(datastore.Get(c).Put(&object{ID: 1}), ShouldBeNil)
// no problems here... memcache operations happen after the function
// body quits.
return nil
}, nil).Error(), ShouldContainSubstring, "SetMulti")
})
})
Convey("misc", func() {
Convey("verify numShards caps at MaxShards", func() {
sc := supportContext{shardsForKey: shardsForKey}
So(sc.numShards(ds.KeyForObj(&shardObj{ID: 9001})), ShouldEqual, MaxShards)
})
Convey("CompressionType.String", func() {
So(NoCompression.String(), ShouldEqual, "NoCompression")
So(ZlibCompression.String(), ShouldEqual, "ZlibCompression")
So(CompressionType(100).String(), ShouldEqual, "UNKNOWN_CompressionType(100)")
})
})
})
Convey("disabled cases", func() {
defer func() {
globalEnabled = true
}()
So(IsGloballyEnabled(c), ShouldBeTrue)
So(SetGlobalEnable(c, false), ShouldBeNil)
// twice is a nop
So(SetGlobalEnable(c, false), ShouldBeNil)
// but it takes 5 minutes to kick in
So(IsGloballyEnabled(c), ShouldBeTrue)
clk.Add(time.Minute*5 + time.Second)
So(IsGloballyEnabled(c), ShouldBeFalse)
So(mc.Set(mc.NewItem("test").SetValue([]byte("hi"))), ShouldBeNil)
So(numMemcacheItems(), ShouldEqual, 1)
So(SetGlobalEnable(c, true), ShouldBeNil)
// memcache gets flushed as a side effect
So(numMemcacheItems(), ShouldEqual, 0)
// Still takes 5 minutes to kick in
So(IsGloballyEnabled(c), ShouldBeFalse)
clk.Add(time.Minute*5 + time.Second)
So(IsGloballyEnabled(c), ShouldBeTrue)
})
})
}
func keyBytes(key *ds.Key) []byte {
return serialize.ToBytes(ds.MkProperty(key))
}
func TestQuerySupport(t *testing.T) {
t.Parallel()
Convey("Queries", t, func() {
Convey("Good", func() {
q := datastore.NewQuery("Foo").Ancestor(root)
Convey("normal", func() {
_, _, ds := mkds(dataSingleRoot)
ds.Testable().AddIndexes(&datastore.IndexDefinition{
Kind: "Foo",
Ancestor: true,
SortBy: []datastore.IndexColumn{
{Property: "Value"},
},
})
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
q = q.Lt("Value", 400000000000000000)
vals := []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 8)
count, err := ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 8)
f := &Foo{ID: 1, Parent: root}
So(ds.Get(f), ShouldBeNil)
f.Value = append(f.Value, 100)
So(ds.Put(f), ShouldBeNil)
// Wowee, zowee, merged queries!
vals2 := []*Foo{}
So(ds.GetAll(q, &vals2), ShouldBeNil)
So(len(vals2), ShouldEqual, 9)
So(vals2[0], ShouldResemble, f)
vals2 = []*Foo{}
So(ds.GetAll(q.Limit(2).Offset(1), &vals2), ShouldBeNil)
So(len(vals2), ShouldEqual, 2)
So(vals2, ShouldResemble, vals[:2])
return nil
}, nil), ShouldBeNil)
})
Convey("keysOnly", func() {
_, _, ds := mkds([]*Foo{
{ID: 2, Parent: root, Value: []int64{1, 2, 3, 4, 5, 6, 7}},
{ID: 3, Parent: root, Value: []int64{3, 4, 5, 6, 7, 8, 9}},
{ID: 4, Parent: root, Value: []int64{3, 5, 7, 9, 11, 100, 1}},
{ID: 5, Parent: root, Value: []int64{1, 70, 101}},
})
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
q = q.Eq("Value", 1).KeysOnly(true)
vals := []*datastore.Key{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 3)
So(vals[2], ShouldResemble, ds.MakeKey("Parent", 1, "Foo", 5))
// can remove keys
So(ds.Delete(ds.MakeKey("Parent", 1, "Foo", 2)), ShouldBeNil)
vals = []*datastore.Key{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 2)
// and add new ones
So(ds.Put(&Foo{ID: 1, Parent: root, Value: []int64{1, 7, 100}}), ShouldBeNil)
So(ds.Put(&Foo{ID: 7, Parent: root, Value: []int64{20, 1}}), ShouldBeNil)
vals = []*datastore.Key{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 4)
So(vals[0].IntID(), ShouldEqual, 1)
So(vals[1].IntID(), ShouldEqual, 4)
So(vals[2].IntID(), ShouldEqual, 5)
So(vals[3].IntID(), ShouldEqual, 7)
return nil
}, nil), ShouldBeNil)
})
Convey("project", func() {
_, _, ds := mkds([]*Foo{
{ID: 2, Parent: root, Value: []int64{1, 2, 3, 4, 5, 6, 7}},
{ID: 3, Parent: root, Value: []int64{3, 4, 5, 6, 7, 8, 9}},
{ID: 4, Parent: root, Value: []int64{3, 5, 7, 9, 11, 100, 1}},
{ID: 5, Parent: root, Value: []int64{1, 70, 101}},
})
ds.Testable().AddIndexes(&datastore.IndexDefinition{
Kind: "Foo",
Ancestor: true,
SortBy: []datastore.IndexColumn{
{Property: "Value"},
},
})
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
count, err := ds.Count(q.Project("Value"))
So(err, ShouldBeNil)
So(count, ShouldEqual, 24)
q = q.Project("Value").Offset(4).Limit(10)
vals := []datastore.PropertyMap{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 10)
expect := []struct {
id int64
val int64
}{
{2, 3},
{3, 3},
{4, 3},
{2, 4},
{3, 4},
{2, 5},
{3, 5},
{4, 5},
{2, 6},
{3, 6},
}
for i, pm := range vals {
So(datastore.GetMetaDefault(pm, "key", nil), ShouldResemble,
ds.MakeKey("Parent", 1, "Foo", expect[i].id))
So(pm["Value"][0].Value(), ShouldEqual, expect[i].val)
}
// should remove 4 entries, but there are plenty more to fill
So(ds.Delete(ds.MakeKey("Parent", 1, "Foo", 2)), ShouldBeNil)
vals = []datastore.PropertyMap{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 10)
expect = []struct {
id int64
val int64
}{
// note (3, 3) and (4, 3) are correctly missing because deleting
// 2 removed two entries which are hidden by the Offset(4).
{3, 4},
{3, 5},
{4, 5},
{3, 6},
{3, 7},
{4, 7},
{3, 8},
{3, 9},
{4, 9},
{4, 11},
}
for i, pm := range vals {
So(datastore.GetMetaDefault(pm, "key", nil), ShouldResemble,
ds.MakeKey("Parent", 1, "Foo", expect[i].id))
So(pm["Value"][0].Value(), ShouldEqual, expect[i].val)
}
So(ds.Put(&Foo{ID: 1, Parent: root, Value: []int64{3, 9}}), ShouldBeNil)
vals = []datastore.PropertyMap{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 10)
expect = []struct {
id int64
val int64
}{
// 'invisible' {1, 3} entry bumps the {4, 3} into view.
{4, 3},
{3, 4},
{3, 5},
{4, 5},
{3, 6},
{3, 7},
{4, 7},
{3, 8},
{1, 9},
{3, 9},
{4, 9},
}
for i, pm := range vals {
So(datastore.GetMetaDefault(pm, "key", nil), ShouldResemble,
ds.MakeKey("Parent", 1, "Foo", expect[i].id))
So(pm["Value"][0].Value(), ShouldEqual, expect[i].val)
}
return nil
}, nil), ShouldBeNil)
})
Convey("project+distinct", func() {
_, _, ds := mkds([]*Foo{
{ID: 2, Parent: root, Value: []int64{1, 2, 3, 4, 5, 6, 7}},
{ID: 3, Parent: root, Value: []int64{3, 4, 5, 6, 7, 8, 9}},
{ID: 4, Parent: root, Value: []int64{3, 5, 7, 9, 11, 100, 1}},
{ID: 5, Parent: root, Value: []int64{1, 70, 101}},
})
ds.Testable().AddIndexes(&datastore.IndexDefinition{
Kind: "Foo",
Ancestor: true,
SortBy: []datastore.IndexColumn{
{Property: "Value"},
},
})
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
q = q.Project("Value").Distinct(true)
vals := []datastore.PropertyMap{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 13)
expect := []struct {
id int64
val int64
}{
{2, 1},
{2, 2},
{2, 3},
{2, 4},
{2, 5},
{2, 6},
{2, 7},
{3, 8},
{3, 9},
{4, 11},
{5, 70},
{4, 100},
{5, 101},
}
for i, pm := range vals {
So(pm["Value"][0].Value(), ShouldEqual, expect[i].val)
So(datastore.GetMetaDefault(pm, "key", nil), ShouldResemble,
ds.MakeKey("Parent", 1, "Foo", expect[i].id))
}
return nil
}, nil), ShouldBeNil)
})
Convey("overwrite", func() {
data := []*Foo{
{ID: 2, Parent: root, Value: []int64{1, 2, 3, 4, 5, 6, 7}},
{ID: 3, Parent: root, Value: []int64{3, 4, 5, 6, 7, 8, 9}},
{ID: 4, Parent: root, Value: []int64{3, 5, 7, 9, 11, 100, 1, 2}},
{ID: 5, Parent: root, Value: []int64{1, 70, 101}},
}
_, _, ds := mkds(data)
q = q.Eq("Value", 2, 3)
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
vals := []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 2)
So(vals[0], ShouldResemble, data[0])
So(vals[1], ShouldResemble, data[2])
foo2 := &Foo{ID: 2, Parent: root, Value: []int64{2, 3}}
So(ds.Put(foo2), ShouldBeNil)
vals = []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 2)
So(vals[0], ShouldResemble, foo2)
So(vals[1], ShouldResemble, data[2])
foo1 := &Foo{ID: 1, Parent: root, Value: []int64{2, 3}}
So(ds.Put(foo1), ShouldBeNil)
vals = []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 3)
So(vals[0], ShouldResemble, foo1)
So(vals[1], ShouldResemble, foo2)
So(vals[2], ShouldResemble, data[2])
return nil
}, nil), ShouldBeNil)
})
projectData := []*Foo{
{ID: 2, Parent: root, Value: []int64{1, 2, 3, 4, 5, 6, 7}, Sort: []string{"x", "z"}},
{ID: 3, Parent: root, Value: []int64{3, 4, 5, 6, 7, 8, 9}, Sort: []string{"b"}},
{ID: 4, Parent: root, Value: []int64{3, 5, 7, 9, 11, 100, 1, 2}, Sort: []string{"aa", "a"}},
{ID: 5, Parent: root, Value: []int64{1, 70, 101}, Sort: []string{"c"}},
}
Convey("project+extra orders", func() {
_, _, ds := mkds(projectData)
ds.Testable().AddIndexes(&datastore.IndexDefinition{
Kind: "Foo",
Ancestor: true,
SortBy: []datastore.IndexColumn{
{Property: "Sort", Descending: true},
{Property: "Value", Descending: true},
},
})
q = q.Project("Value").Order("-Sort", "-Value").Distinct(true)
So(ds.RunInTransaction(func(c context.Context) error {
ds = datastore.Get(c)
So(ds.Put(&Foo{
ID: 1, Parent: root, Value: []int64{0, 1, 1000},
Sort: []string{"zz"}}), ShouldBeNil)
vals := []datastore.PropertyMap{}
So(ds.GetAll(q, &vals), ShouldBeNil)
expect := []struct {
id int64
val int64
}{
{1, 1000},
{1, 1},
{1, 0},
{2, 7},
{2, 6},
{2, 5},
{2, 4},
{2, 3},
{2, 2},
{5, 101},
{5, 70},
{3, 9},
{3, 8},
{4, 100},
{4, 11},
}
for i, pm := range vals {
So(pm["Value"][0].Value(), ShouldEqual, expect[i].val)
So(datastore.GetMetaDefault(pm, "key", nil), ShouldResemble,
ds.MakeKey("Parent", 1, "Foo", expect[i].id))
}
return nil
}, nil), ShouldBeNil)
})
Convey("buffered entity sorts before ineq, but after first parent entity", func() {
// If we got this wrong, we'd see Foo,3 come before Foo,2. This might
// happen because we calculate the comparison string for each entity
// based on the whole entity, but we forgot to limit the comparison
// string generation by the inequality criteria.
data := []*Foo{
{ID: 2, Parent: root, Value: []int64{2, 3, 5, 6}, Sort: []string{"z"}},
}
_, _, ds := mkds(data)
ds.Testable().AddIndexes(&datastore.IndexDefinition{
Kind: "Foo",
Ancestor: true,
SortBy: []datastore.IndexColumn{
{Property: "Value"},
},
})
q = q.Gt("Value", 2).Limit(2)
So(ds.RunInTransaction(func(c context.Context) error {
ds = datastore.Get(c)
foo1 := &Foo{ID: 3, Parent: root, Value: []int64{0, 2, 3, 4}}
So(ds.Put(foo1), ShouldBeNil)
vals := []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 2)
So(vals[0], ShouldResemble, data[0])
So(vals[1], ShouldResemble, foo1)
return nil
}, nil), ShouldBeNil)
})
Convey("keysOnly+extra orders", func() {
_, _, ds := mkds(projectData)
ds.Testable().AddIndexes(&datastore.IndexDefinition{
Kind: "Foo",
Ancestor: true,
SortBy: []datastore.IndexColumn{
{Property: "Sort"},
},
})
q = q.Order("Sort").KeysOnly(true)
So(ds.RunInTransaction(func(c context.Context) error {
ds = datastore.Get(c)
So(ds.Put(&Foo{
ID: 1, Parent: root, Value: []int64{0, 1, 1000},
Sort: []string{"x", "zz"}}), ShouldBeNil)
So(ds.Put(&Foo{
ID: 2, Parent: root, Value: []int64{0, 1, 1000},
Sort: []string{"zz", "zzz", "zzzz"}}), ShouldBeNil)
vals := []*datastore.Key{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(len(vals), ShouldEqual, 5)
So(vals, ShouldResemble, []*datastore.Key{
ds.MakeKey("Parent", 1, "Foo", 4),
ds.MakeKey("Parent", 1, "Foo", 3),
ds.MakeKey("Parent", 1, "Foo", 5),
ds.MakeKey("Parent", 1, "Foo", 1),
ds.MakeKey("Parent", 1, "Foo", 2),
})
return nil
}, nil), ShouldBeNil)
})
Convey("query accross nested transactions", func() {
_, _, ds := mkds(projectData)
q = q.Eq("Value", 2, 3)
foo1 := &Foo{ID: 1, Parent: root, Value: []int64{2, 3}}
foo7 := &Foo{ID: 7, Parent: root, Value: []int64{2, 3}}
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
So(ds.Put(foo1), ShouldBeNil)
vals := []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(vals, ShouldResemble, []*Foo{foo1, projectData[0], projectData[2]})
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
vals := []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(vals, ShouldResemble, []*Foo{foo1, projectData[0], projectData[2]})
So(ds.Delete(ds.MakeKey("Parent", 1, "Foo", 4)), ShouldBeNil)
So(ds.Put(foo7), ShouldBeNil)
vals = []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(vals, ShouldResemble, []*Foo{foo1, projectData[0], foo7})
return nil
}, nil), ShouldBeNil)
vals = []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(vals, ShouldResemble, []*Foo{foo1, projectData[0], foo7})
return nil
}, nil), ShouldBeNil)
vals := []*Foo{}
So(ds.GetAll(q, &vals), ShouldBeNil)
So(vals, ShouldResemble, []*Foo{foo1, projectData[0], foo7})
})
Convey("start transaction from inside query", func() {
_, _, ds := mkds(projectData)
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
q := datastore.NewQuery("Foo").Ancestor(root)
return ds.Run(q, func(pm datastore.PropertyMap) {
So(ds.RunInTransaction(func(c context.Context) error {
ds := datastore.Get(c)
pm["Value"] = append(pm["Value"], datastore.MkProperty("wat"))
return ds.Put(pm)
}, nil), ShouldBeNil)
})
}, &datastore.TransactionOptions{XG: true}), ShouldBeNil)
So(ds.Run(datastore.NewQuery("Foo"), func(pm datastore.PropertyMap) {
val := pm["Value"]
So(val[len(val)-1].Value(), ShouldResemble, "wat")
}), ShouldBeNil)
})
})
})
}
func TestDatastoreSingleReadWriter(t *testing.T) {
t.Parallel()
Convey("Datastore single reads and writes", t, func() {
c := Use(context.Background())
ds := dsS.Get(c)
So(ds, ShouldNotBeNil)
Convey("getting objects that DNE is an error", func() {
So(ds.Get(&Foo{ID: 1}), ShouldEqual, dsS.ErrNoSuchEntity)
})
Convey("bad namespaces fail", func() {
_, err := infoS.Get(c).Namespace("$$blzyall")
So(err.Error(), ShouldContainSubstring, "namespace \"$$blzyall\" does not match")
})
Convey("Can Put stuff", func() {
// with an incomplete key!
f := &Foo{Val: 10}
So(ds.Put(f), ShouldBeNil)
k := ds.KeyForObj(f)
So(k.String(), ShouldEqual, "dev~app::/Foo,1")
Convey("and Get it back", func() {
newFoo := &Foo{ID: 1}
So(ds.Get(newFoo), ShouldBeNil)
So(newFoo, ShouldResemble, f)
Convey("but it's hidden from a different namespace", func() {
c, err := infoS.Get(c).Namespace("whombat")
So(err, ShouldBeNil)
ds = dsS.Get(c)
So(ds.Get(f), ShouldEqual, dsS.ErrNoSuchEntity)
})
Convey("and we can Delete it", func() {
So(ds.Delete(k), ShouldBeNil)
So(ds.Get(newFoo), ShouldEqual, dsS.ErrNoSuchEntity)
})
})
Convey("Deleteing with a bogus key is bad", func() {
So(ds.Delete(ds.NewKey("Foo", "wat", 100, nil)), ShouldEqual, dsS.ErrInvalidKey)
})
Convey("Deleteing a DNE entity is fine", func() {
So(ds.Delete(ds.NewKey("Foo", "wat", 0, nil)), ShouldBeNil)
})
Convey("Deleting entities from a nonexistant namespace works", func() {
aid := infoS.Get(c).FullyQualifiedAppID()
keys := make([]*dsS.Key, 10)
for i := range keys {
keys[i] = ds.MakeKey(aid, "noexist", "Kind", i+1)
}
So(ds.DeleteMulti(keys), ShouldBeNil)
count := 0
So(ds.Raw().DeleteMulti(keys, func(err error) error {
count++
So(err, ShouldBeNil)
return nil
}), ShouldBeNil)
So(count, ShouldEqual, len(keys))
})
Convey("with multiple puts", func() {
So(testGetMeta(c, k), ShouldEqual, 1)
foos := make([]Foo, 10)
for i := range foos {
foos[i].Val = 10
foos[i].Parent = k
}
So(ds.PutMulti(foos), ShouldBeNil)
So(testGetMeta(c, k), ShouldEqual, 11)
keys := make([]*dsS.Key, len(foos))
for i, f := range foos {
keys[i] = ds.KeyForObj(&f)
}
Convey("ensure that group versions persist across deletes", func() {
So(ds.DeleteMulti(append(keys, k)), ShouldBeNil)
ds.Testable().CatchupIndexes()
count := 0
So(ds.Run(dsS.NewQuery(""), func(_ *dsS.Key) {
count++
}), ShouldBeNil)
So(count, ShouldEqual, 3)
So(testGetMeta(c, k), ShouldEqual, 22)
So(ds.Put(&Foo{ID: 1}), ShouldBeNil)
So(testGetMeta(c, k), ShouldEqual, 23)
})
Convey("can Get", func() {
vals := make([]dsS.PropertyMap, len(keys))
for i := range vals {
vals[i] = dsS.PropertyMap{}
So(vals[i].SetMeta("key", keys[i]), ShouldBeTrue)
}
So(ds.GetMulti(vals), ShouldBeNil)
for i, val := range vals {
So(val, ShouldResemble, dsS.PropertyMap{
"Val": {dsS.MkProperty(10)},
"$key": {dsS.MkPropertyNI(keys[i])},
})
}
})
})
Convey("allocating ids prevents their use", func() {
start, err := ds.AllocateIDs(ds.MakeKey("Foo", 0), 100)
So(err, ShouldBeNil)
So(start, ShouldEqual, 2)
f := &Foo{Val: 10}
So(ds.Put(f), ShouldBeNil)
k := ds.KeyForObj(f)
So(k.String(), ShouldEqual, "dev~app::/Foo,102")
})
})
Convey("implements DSTransactioner", func() {
Convey("Put", func() {
f := &Foo{Val: 10}
So(ds.Put(f), ShouldBeNil)
k := ds.KeyForObj(f)
So(k.String(), ShouldEqual, "dev~app::/Foo,1")
Convey("can Put new entity groups", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
f := &Foo{Val: 100}
So(ds.Put(f), ShouldBeNil)
So(f.ID, ShouldEqual, 2)
f.ID = 0
f.Val = 200
So(ds.Put(f), ShouldBeNil)
So(f.ID, ShouldEqual, 3)
return nil
}, &dsS.TransactionOptions{XG: true})
So(err, ShouldBeNil)
f := &Foo{ID: 2}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 100)
f.ID = 3
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 200)
})
Convey("can Put new entities in a current group", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
f := &Foo{Val: 100, Parent: k}
So(ds.Put(f), ShouldBeNil)
So(ds.KeyForObj(f).String(), ShouldEqual, "dev~app::/Foo,1/Foo,1")
f.ID = 0
f.Val = 200
So(ds.Put(f), ShouldBeNil)
So(ds.KeyForObj(f).String(), ShouldEqual, "dev~app::/Foo,1/Foo,2")
return nil
}, nil)
So(err, ShouldBeNil)
f := &Foo{ID: 1, Parent: k}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 100)
f.ID = 2
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 200)
})
Convey("Deletes work too", func() {
err := ds.RunInTransaction(func(c context.Context) error {
return dsS.Get(c).Delete(k)
}, nil)
So(err, ShouldBeNil)
So(ds.Get(&Foo{ID: 1}), ShouldEqual, dsS.ErrNoSuchEntity)
})
Convey("A Get counts against your group count", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
pm := dsS.PropertyMap{}
So(pm.SetMeta("key", ds.NewKey("Foo", "", 20, nil)), ShouldBeTrue)
So(ds.Get(pm), ShouldEqual, dsS.ErrNoSuchEntity)
So(pm.SetMeta("key", k), ShouldBeTrue)
So(ds.Get(pm).Error(), ShouldContainSubstring, "cross-group")
return nil
}, nil)
So(err, ShouldBeNil)
})
Convey("Get takes a snapshot", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10)
// Don't ever do this in a real program unless you want to guarantee
// a failed transaction :)
f.Val = 11
So(dsS.GetNoTxn(c).Put(f), ShouldBeNil)
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10)
return nil
}, nil)
So(err, ShouldBeNil)
f := &Foo{ID: 1}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 11)
})
Convey("and snapshots are consistent even after Puts", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
f := &Foo{ID: 1}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10)
// Don't ever do this in a real program unless you want to guarantee
// a failed transaction :)
f.Val = 11
So(dsS.GetNoTxn(c).Put(f), ShouldBeNil)
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10)
f.Val = 20
So(ds.Put(f), ShouldBeNil)
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10) // still gets 10
return nil
}, &dsS.TransactionOptions{Attempts: 1})
So(err.Error(), ShouldContainSubstring, "concurrent")
f := &Foo{ID: 1}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 11)
})
Convey("Reusing a transaction context is bad news", func() {
txnDS := dsS.Interface(nil)
err := ds.RunInTransaction(func(c context.Context) error {
txnDS = dsS.Get(c)
So(txnDS.Get(f), ShouldBeNil)
return nil
}, nil)
So(err, ShouldBeNil)
So(txnDS.Get(f).Error(), ShouldContainSubstring, "expired")
})
Convey("Nested transactions are rejected", func() {
err := ds.RunInTransaction(func(c context.Context) error {
err := dsS.Get(c).RunInTransaction(func(c context.Context) error {
panic("noooo")
}, nil)
So(err.Error(), ShouldContainSubstring, "nested transactions")
return nil
}, nil)
So(err, ShouldBeNil)
})
Convey("Concurrent transactions only accept one set of changes", func() {
// Note: I think this implementation is actually /slightly/ wrong.
// According to my read of the docs for appengine, when you open a
// transaction it actually (essentially) holds a reference to the
// entire datastore. Our implementation takes a snapshot of the
// entity group as soon as something observes/affects it.
//
// That said... I'm not sure if there's really a semantic difference.
err := ds.RunInTransaction(func(c context.Context) error {
So(dsS.Get(c).Put(&Foo{ID: 1, Val: 21}), ShouldBeNil)
err := dsS.GetNoTxn(c).RunInTransaction(func(c context.Context) error {
So(dsS.Get(c).Put(&Foo{ID: 1, Val: 27}), ShouldBeNil)
return nil
}, nil)
So(err, ShouldBeNil)
return nil
}, nil)
So(err.Error(), ShouldContainSubstring, "concurrent")
f := &Foo{ID: 1}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 27)
})
Convey("XG", func() {
Convey("Modifying two groups with XG=false is invalid", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
f := &Foo{ID: 1, Val: 200}
So(ds.Put(f), ShouldBeNil)
f.ID = 2
err := ds.Put(f)
So(err.Error(), ShouldContainSubstring, "cross-group")
return err
}, nil)
So(err.Error(), ShouldContainSubstring, "cross-group")
})
Convey("Modifying >25 groups with XG=true is invald", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
foos := make([]Foo, 25)
for i := int64(1); i < 26; i++ {
foos[i-1].ID = i
foos[i-1].Val = 200
}
So(ds.PutMulti(foos), ShouldBeNil)
err := ds.Put(&Foo{ID: 26})
So(err.Error(), ShouldContainSubstring, "too many entity groups")
return err
}, &dsS.TransactionOptions{XG: true})
So(err.Error(), ShouldContainSubstring, "too many entity groups")
})
})
Convey("Errors and panics", func() {
Convey("returning an error aborts", func() {
err := ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
So(ds.Put(&Foo{ID: 1, Val: 200}), ShouldBeNil)
return fmt.Errorf("thingy")
}, nil)
So(err.Error(), ShouldEqual, "thingy")
f := &Foo{ID: 1}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10)
})
Convey("panicing aborts", func() {
So(func() {
So(ds.RunInTransaction(func(c context.Context) error {
ds := dsS.Get(c)
So(ds.Put(&Foo{Val: 200}), ShouldBeNil)
panic("wheeeeee")
}, nil), ShouldBeNil)
}, ShouldPanic)
f := &Foo{ID: 1}
So(ds.Get(f), ShouldBeNil)
So(f.Val, ShouldEqual, 10)
})
})
Convey("Transaction retries", func() {
tst := ds.Testable()
Reset(func() { tst.SetTransactionRetryCount(0) })
Convey("SetTransactionRetryCount set to zero", func() {
tst.SetTransactionRetryCount(0)
calls := 0
So(ds.RunInTransaction(func(c context.Context) error {
calls++
return nil
}, nil), ShouldBeNil)
So(calls, ShouldEqual, 1)
})
Convey("default TransactionOptions is 3 attempts", func() {
tst.SetTransactionRetryCount(100) // more than 3
calls := 0
So(ds.RunInTransaction(func(c context.Context) error {
calls++
return nil
}, nil), ShouldEqual, dsS.ErrConcurrentTransaction)
So(calls, ShouldEqual, 3)
})
Convey("non-default TransactionOptions ", func() {
tst.SetTransactionRetryCount(100) // more than 20
calls := 0
So(ds.RunInTransaction(func(c context.Context) error {
calls++
return nil
}, &dsS.TransactionOptions{Attempts: 20}), ShouldEqual, dsS.ErrConcurrentTransaction)
So(calls, ShouldEqual, 20)
})
Convey("SetTransactionRetryCount is respected", func() {
tst.SetTransactionRetryCount(1) // less than 3
calls := 0
So(ds.RunInTransaction(func(c context.Context) error {
calls++
return nil
}, nil), ShouldBeNil)
So(calls, ShouldEqual, 2)
})
Convey("fatal errors are not retried", func() {
tst.SetTransactionRetryCount(1)
calls := 0
So(ds.RunInTransaction(func(c context.Context) error {
calls++
return fmt.Errorf("omg")
}, nil).Error(), ShouldEqual, "omg")
So(calls, ShouldEqual, 1)
})
})
})
})
Convey("Testable.Consistent", func() {
Convey("false", func() {
ds.Testable().Consistent(false) // the default
for i := 0; i < 10; i++ {
So(ds.Put(&Foo{ID: int64(i + 1), Val: i + 1}), ShouldBeNil)
}
q := dsS.NewQuery("Foo").Gt("Val", 3)
count, err := ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 0)
So(ds.Delete(ds.MakeKey("Foo", 4)), ShouldBeNil)
count, err = ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 0)
ds.Testable().Consistent(true)
count, err = ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 6)
})
Convey("true", func() {
ds.Testable().Consistent(true)
for i := 0; i < 10; i++ {
So(ds.Put(&Foo{ID: int64(i + 1), Val: i + 1}), ShouldBeNil)
}
q := dsS.NewQuery("Foo").Gt("Val", 3)
count, err := ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 7)
So(ds.Delete(ds.MakeKey("Foo", 4)), ShouldBeNil)
count, err = ds.Count(q)
So(err, ShouldBeNil)
So(count, ShouldEqual, 6)
})
})
Convey("Testable.DisableSpecialEntities", func() {
ds.Testable().DisableSpecialEntities(true)
So(ds.Put(&Foo{}), ShouldErrLike, "allocateIDs is disabled")
So(ds.Put(&Foo{ID: 1}), ShouldBeNil)
ds.Testable().CatchupIndexes()
count, err := ds.Count(dsS.NewQuery(""))
So(err, ShouldBeNil)
So(count, ShouldEqual, 1) // normally this would include __entity_group__
})
})
}