multi: rename chan DB Open method to OpenForTesting

chainntnfs/bitcoindnotify/bitcoind_test.go

@@ -37,11 +37,7 @@ var (
 func initHintCache(t *testing.T) *channeldb.HeightHintCache {
 	t.Helper()
 
-	db, err := channeldb.Open(t.TempDir())
-	require.NoError(t, err, "unable to create db")
-	t.Cleanup(func() {
-		require.NoError(t, db.Close())
-	})
+	db := channeldb.OpenForTesting(t, t.TempDir())
 
 	testCfg := channeldb.CacheConfig{
 		QueryDisable: false,

chainntnfs/btcdnotify/btcd_test.go

@@ -33,11 +33,7 @@ var (
 func initHintCache(t *testing.T) *channeldb.HeightHintCache {
 	t.Helper()
 
-	db, err := channeldb.Open(t.TempDir())
-	require.NoError(t, err, "unable to create db")
-	t.Cleanup(func() {
-		require.NoError(t, db.Close())
-	})
+	db := channeldb.OpenForTesting(t, t.TempDir())
 
 	testCfg := channeldb.CacheConfig{
 		QueryDisable: false,

chainntnfs/test/test_interface.go

@@ -1906,10 +1906,8 @@ func TestInterfaces(t *testing.T, targetBackEnd string) {
 
 		// Initialize a height hint cache for each notifier.
 		tempDir := t.TempDir()
-		db, err := channeldb.Open(tempDir)
-		if err != nil {
-			t.Fatalf("unable to create db: %v", err)
-		}
+		db := channeldb.OpenForTesting(t, tempDir)
+
 		testCfg := channeldb.CacheConfig{
 			QueryDisable: false,
 		}