Add Consistent(bool) to Testing interface

service/datastore/interface.go

Index: service/datastore/interface.go
diff --git a/service/datastore/interface.go b/service/datastore/interface.go
index c52e8b02010918c4704c7cc40439e8633006bed7..624d5d0bd0d01232357ea7977fa6b7e420e67d48 100644
--- a/service/datastore/interface.go
+++ b/service/datastore/interface.go
@@ -100,6 +100,11 @@ type Interface interface {
 	// Run stops on the first error encountered.
 	Run(q *Query, cb interface{}) error
 
+	// Count is a convenience method to count the number of results that a query
+	// has. It does this by running the keys-only version of q and counting. No
+	// magic here.
+	Count(q *Query) (int64, error)

[Vadim Sh., 2015/09/24 18:40:11]

Is it how ndb's count() work? I though there IS magic there...

[iannucci, 2015/09/24 18:59:30]

So I took a look... it seems like there's actually a little bit of magic there
(but not a whole lot):
https://github.com/golang/appengine/blob/master/datastore/query.go#L335

I'll move this to RawInterface.

+
 	// DecodeCursor converts a string returned by a Cursor into a Cursor instance.
 	// It will return an error if the supplied string is not valid, or could not
 	// be decoded by the implementation.