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// +build postgres
package glsql
import (
"testing"
"github.com/stretchr/testify/require"
)
func TestDB_Truncate(t *testing.T) {
db := GetDB(t)
_, err := db.Exec("CREATE TABLE truncate_tbl(id BIGSERIAL PRIMARY KEY)")
require.NoError(t, err)
res, err := db.Exec("INSERT INTO truncate_tbl VALUES (DEFAULT), (DEFAULT)")
require.NoError(t, err)
affected, err := res.RowsAffected()
require.NoError(t, err)
require.Equal(t, int64(2), affected, "2 rows must be inserted into the table")
db.Truncate(t, "truncate_tbl")
var count int
require.NoError(t, db.QueryRow("SELECT COUNT(*) FROM truncate_tbl").Scan(&count))
require.Equal(t, 0, count, "no rows must exist after TRUNCATE operation")
var id int
require.NoError(t, db.QueryRow("INSERT INTO truncate_tbl VALUES (DEFAULT) RETURNING id").Scan(&id))
require.Equal(t, 1, id, "sequence for primary key must be restarted")
}
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