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|
//go:build go1.9
// +build go1.9
package pq
import (
"context"
"database/sql"
"database/sql/driver"
"reflect"
"testing"
)
func TestPing(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
db := openTestConn(t)
defer db.Close()
if _, ok := reflect.TypeOf(db).MethodByName("Conn"); !ok {
t.Skipf("Conn method undefined on type %T, skipping test (requires at least go1.9)", db)
}
if err := db.PingContext(ctx); err != nil {
t.Fatal("expected Ping to succeed")
}
defer cancel()
// grab a connection
conn, err := db.Conn(ctx)
if err != nil {
t.Fatal(err)
}
// start a transaction and read backend pid of our connection
tx, err := conn.BeginTx(ctx, &sql.TxOptions{
Isolation: sql.LevelDefault,
ReadOnly: true,
})
if err != nil {
t.Fatal(err)
}
rows, err := tx.Query("SELECT pg_backend_pid()")
if err != nil {
t.Fatal(err)
}
defer rows.Close()
// read the pid from result
var pid int
for rows.Next() {
if err := rows.Scan(&pid); err != nil {
t.Fatal(err)
}
}
if rows.Err() != nil {
t.Fatal(err)
}
// Fail the transaction and make sure we can still ping.
if _, err := tx.Query("INVALID SQL"); err == nil {
t.Fatal("expected error")
}
if err := conn.PingContext(ctx); err != nil {
t.Fatal(err)
}
if err := tx.Rollback(); err != nil {
t.Fatal(err)
}
// kill the process which handles our connection and test if the ping fails
if _, err := db.Exec("SELECT pg_terminate_backend($1)", pid); err != nil {
t.Fatal(err)
}
if err := conn.PingContext(ctx); err != driver.ErrBadConn {
t.Fatalf("expected error %s, instead got %s", driver.ErrBadConn, err)
}
}
func TestCommitInFailedTransactionWithCancelContext(t *testing.T) {
db := openTestConn(t)
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
txn, err := db.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
rows, err := txn.Query("SELECT error")
if err == nil {
rows.Close()
t.Fatal("expected failure")
}
err = txn.Commit()
if err != ErrInFailedTransaction {
t.Fatalf("expected ErrInFailedTransaction; got %#v", err)
}
}
|
