impl/memory: Disallow empty namespace.

impl/memory/datastore_test.go

Index: impl/memory/datastore_test.go
diff --git a/impl/memory/datastore_test.go b/impl/memory/datastore_test.go
index 3a171109a2aedbda94e2ca4b1133dfeeee7bab8d..5700dad2eb96441ef08857871de3414e7f9259dc 100644
--- a/impl/memory/datastore_test.go
+++ b/impl/memory/datastore_test.go
@@ -639,7 +639,7 @@ func TestAddIndexes(t *testing.T) {
 
 	Convey("Test Testable.AddIndexes", t, func() {
 		ctx := UseWithAppID(context.Background(), "aid")
-		namespaces := []string{"", "good", "news", "everyone"}
+		namespaces := []string{"good", "news", "everyone"}
 
 		Convey("After adding datastore entries, can query against indexes in various namespaces", func() {
 			foos := []*Foo{
@@ -674,7 +674,7 @@ func TestAddIndexes(t *testing.T) {
 				So(len(results), ShouldEqual, 2)
 			}
 
-			// Add "foos" to a new namesapce, then confirm that it gets indexed.
+			// Add "foos" to a new namespace, then confirm that it gets indexed.
 			So(dsS.Get(infoS.Get(ctx).MustNamespace("qux")).PutMulti(foos), ShouldBeNil)
 			dsS.Get(ctx).Testable().CatchupIndexes()