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|
// +build go1.8
package pq
import (
"context"
"database/sql"
"testing"
"time"
)
func TestMultipleSimpleQuery(t *testing.T) {
db := openTestConn(t)
defer db.Close()
rows, err := db.Query("select 1; set time zone default; select 2; select 3")
if err != nil {
t.Fatal(err)
}
defer rows.Close()
var i int
for rows.Next() {
if err := rows.Scan(&i); err != nil {
t.Fatal(err)
}
if i != 1 {
t.Fatalf("expected 1, got %d", i)
}
}
if !rows.NextResultSet() {
t.Fatal("expected more result sets", rows.Err())
}
for rows.Next() {
if err := rows.Scan(&i); err != nil {
t.Fatal(err)
}
if i != 2 {
t.Fatalf("expected 2, got %d", i)
}
}
// Make sure that if we ignore a result we can still query.
rows, err = db.Query("select 4; select 5")
if err != nil {
t.Fatal(err)
}
defer rows.Close()
for rows.Next() {
if err := rows.Scan(&i); err != nil {
t.Fatal(err)
}
if i != 4 {
t.Fatalf("expected 4, got %d", i)
}
}
if !rows.NextResultSet() {
t.Fatal("expected more result sets", rows.Err())
}
for rows.Next() {
if err := rows.Scan(&i); err != nil {
t.Fatal(err)
}
if i != 5 {
t.Fatalf("expected 5, got %d", i)
}
}
if rows.NextResultSet() {
t.Fatal("unexpected result set")
}
}
func TestContextCancelExec(t *testing.T) {
db := openTestConn(t)
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
// Delay execution for just a bit until db.ExecContext has begun.
defer time.AfterFunc(time.Millisecond*10, cancel).Stop()
// Not canceled until after the exec has started.
if _, err := db.ExecContext(ctx, "select pg_sleep(1)"); err == nil {
t.Fatal("expected error")
} else if err.Error() != "pq: canceling statement due to user request" {
t.Fatalf("unexpected error: %s", err)
}
// Context is already canceled, so error should come before execution.
if _, err := db.ExecContext(ctx, "select pg_sleep(1)"); err == nil {
t.Fatal("expected error")
} else if err.Error() != "context canceled" {
t.Fatalf("unexpected error: %s", err)
}
}
func TestContextCancelQuery(t *testing.T) {
db := openTestConn(t)
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
// Delay execution for just a bit until db.QueryContext has begun.
defer time.AfterFunc(time.Millisecond*10, cancel).Stop()
// Not canceled until after the exec has started.
if _, err := db.QueryContext(ctx, "select pg_sleep(1)"); err == nil {
t.Fatal("expected error")
} else if err.Error() != "pq: canceling statement due to user request" {
t.Fatalf("unexpected error: %s", err)
}
// Context is already canceled, so error should come before execution.
if _, err := db.QueryContext(ctx, "select pg_sleep(1)"); err == nil {
t.Fatal("expected error")
} else if err.Error() != "context canceled" {
t.Fatalf("unexpected error: %s", err)
}
}
func TestContextCancelBegin(t *testing.T) {
db := openTestConn(t)
defer db.Close()
ctx, cancel := context.WithCancel(context.Background())
tx, err := db.BeginTx(ctx, nil)
if err != nil {
t.Fatal(err)
}
// Delay execution for just a bit until tx.Exec has begun.
defer time.AfterFunc(time.Millisecond*10, cancel).Stop()
// Not canceled until after the exec has started.
if _, err := tx.Exec("select pg_sleep(1)"); err == nil {
t.Fatal("expected error")
} else if err.Error() != "pq: canceling statement due to user request" {
t.Fatalf("unexpected error: %s", err)
}
// Transaction is canceled, so expect an error.
if _, err := tx.Query("select pg_sleep(1)"); err == nil {
t.Fatal("expected error")
} else if err != sql.ErrTxDone {
t.Fatalf("unexpected error: %s", err)
}
// Context is canceled, so cannot begin a transaction.
if _, err := db.BeginTx(ctx, nil); err == nil {
t.Fatal("expected error")
} else if err.Error() != "context canceled" {
t.Fatalf("unexpected error: %s", err)
}
}
|
