fix tests failing from the recent groupcache changes

postgres/batch_test.go

@@ -23,6 +23,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/mailgun/groupcache/v2"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
@@ -51,6 +52,7 @@ var _ = Describe("Batch", func() {
 		batch = database.NewBatch()
 	})
 	AfterEach(func() {
+		groupcache.DeregisterGroup("db")
 		err = pgipfsethdb.ResetTestDB(db)
 		Expect(err).ToNot(HaveOccurred())
 	})

postgres/database_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/jmoiron/sqlx"
+	"github.com/mailgun/groupcache/v2"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
@@ -54,6 +55,7 @@ var _ = Describe("Database", func() {
 		database = pgipfsethdb.NewDatabase(db, cacheConfig)
 	})
 	AfterEach(func() {
+		groupcache.DeregisterGroup("db")
 		err = pgipfsethdb.ResetTestDB(db)
 		Expect(err).ToNot(HaveOccurred())
 	})

postgres/util.go

@@ -44,6 +44,6 @@ func TestDB() (*sqlx.DB, error) {
 
 // ResetTestDB drops all rows in the test db public.blocks table
 func ResetTestDB(db *sqlx.DB) error {
-	_, err := db.Exec("TRUNCATE public.blocks")
+	_, err := db.Exec("TRUNCATE public.blocks CASCADE")
 	return err
 }