ipld-eth-server/vendor/github.com/lib/pq/go18_test.go
Rob Mulholand 560305f601 Update dependencies
- uses newer version of go-ethereum required for go1.11
2018-09-13 16:14:35 -05:00

322 lines
7.6 KiB
Go

// +build go1.8
package pq
import (
"context"
"database/sql"
"runtime"
"strings"
"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")
}
}
const contextRaceIterations = 100
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)
}
for i := 0; i < contextRaceIterations; i++ {
func() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if _, err := db.ExecContext(ctx, "select 1"); err != nil {
t.Fatal(err)
}
}()
if _, err := db.Exec("select 1"); err != nil {
t.Fatal(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)
}
for i := 0; i < contextRaceIterations; i++ {
func() {
ctx, cancel := context.WithCancel(context.Background())
rows, err := db.QueryContext(ctx, "select 1")
cancel()
if err != nil {
t.Fatal(err)
} else if err := rows.Close(); err != nil {
t.Fatal(err)
}
}()
if rows, err := db.Query("select 1"); err != nil {
t.Fatal(err)
} else if err := rows.Close(); err != nil {
t.Fatal(err)
}
}
}
// TestIssue617 tests that a failed query in QueryContext doesn't lead to a
// goroutine leak.
func TestIssue617(t *testing.T) {
db := openTestConn(t)
defer db.Close()
const N = 10
numGoroutineStart := runtime.NumGoroutine()
for i := 0; i < N; i++ {
func() {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
_, err := db.QueryContext(ctx, `SELECT * FROM DOESNOTEXIST`)
pqErr, _ := err.(*Error)
// Expecting "pq: relation \"doesnotexist\" does not exist" error.
if err == nil || pqErr == nil || pqErr.Code != "42P01" {
t.Fatalf("expected undefined table error, got %v", err)
}
}()
}
numGoroutineFinish := runtime.NumGoroutine()
// We use N/2 and not N because the GC and other actors may increase or
// decrease the number of goroutines.
if numGoroutineFinish-numGoroutineStart >= N/2 {
t.Errorf("goroutine leak detected, was %d, now %d", numGoroutineStart, numGoroutineFinish)
}
}
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)
}
for i := 0; i < contextRaceIterations; i++ {
func() {
ctx, cancel := context.WithCancel(context.Background())
tx, err := db.BeginTx(ctx, nil)
cancel()
if err != nil {
t.Fatal(err)
} else if err := tx.Rollback(); err != nil &&
err.Error() != "pq: canceling statement due to user request" &&
err != sql.ErrTxDone {
t.Fatal(err)
}
}()
if tx, err := db.Begin(); err != nil {
t.Fatal(err)
} else if err := tx.Rollback(); err != nil {
t.Fatal(err)
}
}
}
func TestTxOptions(t *testing.T) {
db := openTestConn(t)
defer db.Close()
ctx := context.Background()
tests := []struct {
level sql.IsolationLevel
isolation string
}{
{
level: sql.LevelDefault,
isolation: "",
},
{
level: sql.LevelReadUncommitted,
isolation: "read uncommitted",
},
{
level: sql.LevelReadCommitted,
isolation: "read committed",
},
{
level: sql.LevelRepeatableRead,
isolation: "repeatable read",
},
{
level: sql.LevelSerializable,
isolation: "serializable",
},
}
for _, test := range tests {
for _, ro := range []bool{true, false} {
tx, err := db.BeginTx(ctx, &sql.TxOptions{
Isolation: test.level,
ReadOnly: ro,
})
if err != nil {
t.Fatal(err)
}
var isolation string
err = tx.QueryRow("select current_setting('transaction_isolation')").Scan(&isolation)
if err != nil {
t.Fatal(err)
}
if test.isolation != "" && isolation != test.isolation {
t.Errorf("wrong isolation level: %s != %s", isolation, test.isolation)
}
var isRO string
err = tx.QueryRow("select current_setting('transaction_read_only')").Scan(&isRO)
if err != nil {
t.Fatal(err)
}
if ro != (isRO == "on") {
t.Errorf("read/[write,only] not set: %t != %s for level %s",
ro, isRO, test.isolation)
}
tx.Rollback()
}
}
_, err := db.BeginTx(ctx, &sql.TxOptions{
Isolation: sql.LevelLinearizable,
})
if err == nil {
t.Fatal("expected LevelLinearizable to fail")
}
if !strings.Contains(err.Error(), "isolation level not supported") {
t.Errorf("Expected error to mention isolation level, got %q", err)
}
}