fix tests

compress.go

@@ -96,6 +96,10 @@ func newCompIO(mc *mysqlConn) *compIO {
 	}
 }
 
+func (c *compIO) reset() {
+	c.buff.Reset()
+}
+
 func (c *compIO) readNext(need int, r readwriteFunc) ([]byte, error) {
 	for c.buff.Len() < need {
 		if err := c.readCompressedPacket(r); err != nil {

connection.go

@@ -97,6 +97,7 @@ func (mc *mysqlConn) syncSequenceNr() {
 	// https://github.com/mysql/mysql-server/blob/824e2b4064053f7daf17d7f3f84b7a3ed92e5fb4/sql-common/net_serv.cc#L293
 	if mc.compress {
 		mc.sequence = mc.compressSequence
+		mc.compIO.reset()
 	}
 }
 

driver_test.go

@@ -971,12 +971,16 @@ func TestDateTime(t *testing.T) {
 			var err error
 			rows, err = dbt.db.Query(`SELECT cast("00:00:00.1" as TIME(1)) = "00:00:00.1"`)
 			if err == nil {
-				rows.Scan(&microsecsSupported)
+				if rows.Next() {
+					rows.Scan(&microsecsSupported)
+				}
 				rows.Close()
 			}
 			rows, err = dbt.db.Query(`SELECT cast("0000-00-00" as DATE) = "0000-00-00"`)
 			if err == nil {
-				rows.Scan(&zeroDateSupported)
+				if rows.Next() {
+					rows.Scan(&zeroDateSupported)
+				}
 				rows.Close()
 			}
 			for _, setups := range testcases {