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package pgx_test
import (
"context"
"fmt"
"testing"
"time"
"github.com/jackc/pgx"
"github.com/jackc/pgx/pgmock"
"github.com/jackc/pgx/pgproto3"
)
func TestTransactionSuccessfulCommit(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnConfig)
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id) initially deferred
);
`
if _, err := conn.Exec(createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin()
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
_, err = tx.Exec("insert into foo(id) values (1)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("tx.Commit failed: %v", err)
}
var n int64
err = conn.QueryRow("select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 1 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxCommitWhenTxBroken(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnConfig)
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id) initially deferred
);
`
if _, err := conn.Exec(createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin()
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
if _, err := tx.Exec("insert into foo(id) values (1)"); err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
// Purposely break transaction
if _, err := tx.Exec("syntax error"); err == nil {
t.Fatal("Unexpected success")
}
err = tx.Commit()
if err != pgx.ErrTxCommitRollback {
t.Fatalf("Expected error %v, got %v", pgx.ErrTxCommitRollback, err)
}
var n int64
err = conn.QueryRow("select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 0 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestTxCommitSerializationFailure(t *testing.T) {
t.Parallel()
pool := createConnPool(t, 5)
defer pool.Close()
pool.Exec(`drop table if exists tx_serializable_sums`)
_, err := pool.Exec(`create table tx_serializable_sums(num integer);`)
if err != nil {
t.Fatalf("Unable to create temporary table: %v", err)
}
defer pool.Exec(`drop table tx_serializable_sums`)
tx1, err := pool.BeginEx(context.Background(), &pgx.TxOptions{IsoLevel: pgx.Serializable})
if err != nil {
t.Fatalf("BeginEx failed: %v", err)
}
defer tx1.Rollback()
tx2, err := pool.BeginEx(context.Background(), &pgx.TxOptions{IsoLevel: pgx.Serializable})
if err != nil {
t.Fatalf("BeginEx failed: %v", err)
}
defer tx2.Rollback()
_, err = tx1.Exec(`insert into tx_serializable_sums(num) select sum(num) from tx_serializable_sums`)
if err != nil {
t.Fatalf("Exec failed: %v", err)
}
_, err = tx2.Exec(`insert into tx_serializable_sums(num) select sum(num) from tx_serializable_sums`)
if err != nil {
t.Fatalf("Exec failed: %v", err)
}
err = tx1.Commit()
if err != nil {
t.Fatalf("Commit failed: %v", err)
}
err = tx2.Commit()
if pgErr, ok := err.(pgx.PgError); !ok || pgErr.Code != "40001" {
t.Fatalf("Expected serialization error 40001, got %#v", err)
}
}
func TestTransactionSuccessfulRollback(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnConfig)
defer closeConn(t, conn)
createSql := `
create temporary table foo(
id integer,
unique (id) initially deferred
);
`
if _, err := conn.Exec(createSql); err != nil {
t.Fatalf("Failed to create table: %v", err)
}
tx, err := conn.Begin()
if err != nil {
t.Fatalf("conn.Begin failed: %v", err)
}
_, err = tx.Exec("insert into foo(id) values (1)")
if err != nil {
t.Fatalf("tx.Exec failed: %v", err)
}
err = tx.Rollback()
if err != nil {
t.Fatalf("tx.Rollback failed: %v", err)
}
var n int64
err = conn.QueryRow("select count(*) from foo").Scan(&n)
if err != nil {
t.Fatalf("QueryRow Scan failed: %v", err)
}
if n != 0 {
t.Fatalf("Did not receive correct number of rows: %v", n)
}
}
func TestBeginExIsoLevels(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnConfig)
defer closeConn(t, conn)
isoLevels := []pgx.TxIsoLevel{pgx.Serializable, pgx.RepeatableRead, pgx.ReadCommitted, pgx.ReadUncommitted}
for _, iso := range isoLevels {
tx, err := conn.BeginEx(context.Background(), &pgx.TxOptions{IsoLevel: iso})
if err != nil {
t.Fatalf("conn.BeginEx failed: %v", err)
}
var level pgx.TxIsoLevel
conn.QueryRow("select current_setting('transaction_isolation')").Scan(&level)
if level != iso {
t.Errorf("Expected to be in isolation level %v but was %v", iso, level)
}
err = tx.Rollback()
if err != nil {
t.Fatalf("tx.Rollback failed: %v", err)
}
}
}
func TestBeginExReadOnly(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnCon
CDF6
fig)
defer closeConn(t, conn)
tx, err := conn.BeginEx(context.Background(), &pgx.TxOptions{AccessMode: pgx.ReadOnly})
if err != nil {
t.Fatalf("conn.BeginEx failed: %v", err)
}
defer tx.Rollback()
_, err = conn.Exec("create table foo(id serial primary key)")
if pgErr, ok := err.(pgx.PgError); !ok || pgErr.Code != "25006" {
t.Errorf("Expected error SQLSTATE 25006, but got %#v", err)
}
}
func TestConnBeginExContextCancel(t *testing.T) {
t.Parallel()
script := &pgmock.Script{
Steps: pgmock.AcceptUnauthenticatedConnRequestSteps(),
}
script.Steps = append(script.Steps, pgmock.PgxInitSteps()...)
script.Steps = append(script.Steps,
pgmock.ExpectMessage(&pgproto3.Query{String: "begin"}),
pgmock.WaitForClose(),
)
server, err := pgmock.NewServer(script)
if err != nil {
t.Fatal(err)
}
defer server.Close()
errChan := make(chan error, 1)
go func() {
errChan <- server.ServeOne()
}()
mockConfig, err := pgx.ParseURI(fmt.Sprintf("postgres://pgx_md5:secret@%s/pgx_test?sslmode=disable", server.Addr()))
if err != nil {
t.Fatal(err)
}
conn := mustConnect(t, mockConfig)
ctx, _ := context.WithTimeout(context.Background(), 50*time.Millisecond)
_, err = conn.BeginEx(ctx, nil)
if err != context.DeadlineExceeded {
t.Errorf("err => %v, want %v", err, context.DeadlineExceeded)
}
if conn.IsAlive() {
t.Error("expected conn to be dead after BeginEx failure")
}
if err := <-errChan; err != nil {
t.Errorf("mock server err: %v", err)
}
}
func TestTxCommitExCancel(t *testing.T) {
t.Parallel()
script := &pgmock.Script{
Steps: pgmock.AcceptUnauthenticatedConnRequestSteps(),
}
script.Steps = append(script.Steps, pgmock.PgxInitSteps()...)
script.Steps = append(script.Steps,
pgmock.ExpectMessage(&pgproto3.Query{String: "begin"}),
pgmock.SendMessage(&pgproto3.CommandComplete{CommandTag: "BEGIN"}),
pgmock.SendMessage(&pgproto3.ReadyForQuery{TxStatus: 'T'}),
pgmock.WaitForClose(),
)
server, err := pgmock.NewServer(script)
if err != nil {
t.Fatal(err)
}
defer server.Close()
errChan := make(chan error, 1)
go func() {
errChan <- server.ServeOne()
}()
mockConfig, err := pgx.ParseURI(fmt.Sprintf("postgres://pgx_md5:secret@%s/pgx_test?sslmode=disable", server.Addr()))
if err != nil {
t.Fatal(err)
}
conn := mustConnect(t, mockConfig)
defer conn.Close()
tx, err := conn.Begin()
if err != nil {
t.Fatal(err)
}
ctx, _ := context.WithTimeout(context.Background(), 50*time.Millisecond)
err = tx.CommitEx(ctx)
if err != context.DeadlineExceeded {
t.Errorf("err => %v, want %v", err, context.DeadlineExceeded)
}
if conn.IsAlive() {
t.Error("expected conn to be dead after CommitEx failure")
}
if err := <-errChan; err != nil {
t.Errorf("mock server err: %v", err)
}
}
func TestTxStatus(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnConfig)
defer closeConn(t, conn)
tx, err := conn.Begin()
if err != nil {
t.Fatal(err)
}
if status := tx.Status(); status != pgx.TxStatusInProgress {
t.Fatalf("Expected status to be %v, but it was %v", pgx.TxStatusInProgress, status)
}
if err := tx.Rollback(); err != nil {
t.Fatal(err)
}
if status := tx.Status(); status != pgx.TxStatusRollbackSuccess {
t.Fatalf("Expected status to be %v, but it was %v", pgx.TxStatusRollbackSuccess, status)
}
}
func TestTxErr(t *testing.T) {
t.Parallel()
conn := mustConnect(t, *defaultConnConfig)
defer closeConn(t, conn)
tx, err := conn.Begin()
if err != nil {
t.Fatal(err)
}
// Purposely break transaction
if _, err := tx.Exec("syntax error"); err == nil {
t.Fatal("Unexpected success")
}
if err := tx.Commit(); err != pgx.ErrTxCommitRollback {
t.Fatalf("Expected error %v, got %v", pgx.ErrTxCommitRollback, err)
}
if status := tx.Status(); status != pgx.TxStatusCommitFailure {
t.Fatalf("Expected status to be %v, but it was %v", pgx.TxStatusRollbackSuccess, status)
}
if err := tx.Err(); err != pgx.ErrTxCommitRollback {
t.Fatalf("Expected error %v, got %v", pgx.ErrTxCommitRollback, err)
}
}