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sql_test.go
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package sql
import (
"database/sql/driver"
"errors"
"fmt"
"math/rand"
"reflect"
"runtime"
"strings"
"sync"
"testing"
"time"
)
func init() {
type dbConn struct {
db *DB
c *driverConn
}
freedFrom := make(map[dbConn]string)
putConnHook = func(db *DB, c *driverConn) {
idx := -1
for i, v := range db.freeConn {
if v == c {
idx = i
break
}
}
if idx >= 0 {
// print before panic, as panic may get lost due to conflicting panic
// (all goroutines asleep) elsewhere, since we might not unlock
// the mutex in freeConn here.
println("double free of conn. conflicts are:\nA) " + freedFrom[dbConn{db, c}] + "\n\nand\nB) " + stack())
panic("double free of conn.")
}
freedFrom[dbConn{db, c}] = stack()
}
}
const fakeDBName = "foo"
var chrisBirthday = time.Unix(123456789, 0)
func newTestDB(t testing.TB, name string) *DB {
db, err := Open("test", fakeDBName)
if err != nil {
t.Fatalf("Open: %v", err)
}
if _, err := db.Exec("WIPE"); err != nil {
t.Fatalf("exec wipe: %v", err)
}
if name == "people" {
exec(t, db, "CREATE|people|name=string,age=int32,photo=blob,dead=bool,bdate=datetime")
exec(t, db, "INSERT|people|name=Alice,age=?,photo=APHOTO", 1)
exec(t, db, "INSERT|people|name=Bob,age=?,photo=BPHOTO", 2)
exec(t, db, "INSERT|people|name=Chris,age=?,photo=CPHOTO,bdate=?", 3, chrisBirthday)
}
if name == "magicquery" {
// Magic table name and column, known by fakedb_test.go.
exec(t, db, "CREATE|magicquery|op=string,millis=int32")
exec(t, db, "INSERT|magicquery|op=sleep,millis=10")
}
return db
}
func exec(t testing.TB, db *DB, query string, args ...interface{}) {
_, err := db.Exec(query, args...)
if err != nil {
t.Fatalf("Exec of %q: %v", query, err)
}
}
func closeDB(t testing.TB, db *DB) {
if e := recover(); e != nil {
fmt.Printf("Panic: %v\n", e)
panic(e)
}
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v", err)
}
})
for i, dc := range db.freeConn {
if n := len(dc.openStmt); n > 0 {
// Just a sanity check. This is legal in
// general, but if we make the tests clean up
// their statements first, then we can safely
// verify this is always zero here, and any
// other value is a leak.
t.Errorf("while closing db, freeConn %d/%d had %d open stmts; want 0", i, len(db.freeConn), n)
}
}
err := db.Close()
if err != nil {
t.Fatalf("error closing DB: %v", err)
}
db.mu.Lock()
count := db.numOpen
db.mu.Unlock()
if count != 0 {
t.Fatalf("%d connections still open after closing DB", db.numOpen)
}
}
// numPrepares assumes that db has exactly 1 idle conn and returns
// its count of calls to Prepare
func numPrepares(t *testing.T, db *DB) int {
if n := len(db.freeConn); n != 1 {
t.Fatalf("free conns = %d; want 1", n)
}
return db.freeConn[0].ci.(*fakeConn).numPrepare
}
func (db *DB) numDeps() int {
db.mu.Lock()
defer db.mu.Unlock()
return len(db.dep)
}
// Dependencies are closed via a goroutine, so this polls waiting for
// numDeps to fall to want, waiting up to d.
func (db *DB) numDepsPollUntil(want int, d time.Duration) int {
deadline := time.Now().Add(d)
for {
n := db.numDeps()
if n <= want || time.Now().After(deadline) {
return n
}
time.Sleep(50 * time.Millisecond)
}
}
func (db *DB) numFreeConns() int {
db.mu.Lock()
defer db.mu.Unlock()
return len(db.freeConn)
}
func (db *DB) dumpDeps(t *testing.T) {
for fc := range db.dep {
db.dumpDep(t, 0, fc, map[finalCloser]bool{})
}
}
func (db *DB) dumpDep(t *testing.T, depth int, dep finalCloser, seen map[finalCloser]bool) {
seen[dep] = true
indent := strings.Repeat(" ", depth)
ds := db.dep[dep]
for k := range ds {
t.Logf("%s%T (%p) waiting for -> %T (%p)", indent, dep, dep, k, k)
if fc, ok := k.(finalCloser); ok {
if !seen[fc] {
db.dumpDep(t, depth+1, fc, seen)
}
}
}
}
func TestQuery(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
prepares0 := numPrepares(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
type row struct {
age int
name string
}
got := []row{}
for rows.Next() {
var r row
err = rows.Scan(&r.age, &r.name)
if err != nil {
t.Fatalf("Scan: %v", err)
}
got = append(got, r)
}
err = rows.Err()
if err != nil {
t.Fatalf("Err: %v", err)
}
want := []row{
{age: 1, name: "Alice"},
{age: 2, name: "Bob"},
{age: 3, name: "Chris"},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("mismatch.\n got: %#v\nwant: %#v", got, want)
}
// And verify that the final rows.Next() call, which hit EOF,
// also closed the rows connection.
if n := db.numFreeConns(); n != 1 {
t.Fatalf("free conns after query hitting EOF = %d; want 1", n)
}
if prepares := numPrepares(t, db) - prepares0; prepares != 1 {
t.Errorf("executed %d Prepare statements; want 1", prepares)
}
}
func TestByteOwnership(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
rows, err := db.Query("SELECT|people|name,photo|")
if err != nil {
t.Fatalf("Query: %v", err)
}
type row struct {
name []byte
photo RawBytes
}
got := []row{}
for rows.Next() {
var r row
err = rows.Scan(&r.name, &r.photo)
if err != nil {
t.Fatalf("Scan: %v", err)
}
got = append(got, r)
}
corruptMemory := []byte("\xffPHOTO")
want := []row{
{name: []byte("Alice"), photo: corruptMemory},
{name: []byte("Bob"), photo: corruptMemory},
{name: []byte("Chris"), photo: corruptMemory},
}
if !reflect.DeepEqual(got, want) {
t.Errorf("mismatch.\n got: %#v\nwant: %#v", got, want)
}
var photo RawBytes
err = db.QueryRow("SELECT|people|photo|name=?", "Alice").Scan(&photo)
if err == nil {
t.Error("want error scanning into RawBytes from QueryRow")
}
}
func TestRowsColumns(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
rows, err := db.Query("SELECT|people|age,name|")
if err != nil {
t.Fatalf("Query: %v", err)
}
cols, err := rows.Columns()
if err != nil {
t.Fatalf("Columns: %v", err)
}
want := []string{"age", "name"}
if !reflect.DeepEqual(cols, want) {
t.Errorf("got %#v; want %#v", cols, want)
}
if err := rows.Close(); err != nil {
t.Errorf("error closing rows: %s", err)
}
}
func TestQueryRow(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var name string
var age int
var birthday time.Time
err := db.QueryRow("SELECT|people|age,name|age=?", 3).Scan(&age)
if err == nil || !strings.Contains(err.Error(), "expected 2 destination arguments") {
t.Errorf("expected error from wrong number of arguments; actually got: %v", err)
}
err = db.QueryRow("SELECT|people|bdate|age=?", 3).Scan(&birthday)
if err != nil || !birthday.Equal(chrisBirthday) {
t.Errorf("chris birthday = %v, err = %v; want %v", birthday, err, chrisBirthday)
}
err = db.QueryRow("SELECT|people|age,name|age=?", 2).Scan(&age, &name)
if err != nil {
t.Fatalf("age QueryRow+Scan: %v", err)
}
if name != "Bob" {
t.Errorf("expected name Bob, got %q", name)
}
if age != 2 {
t.Errorf("expected age 2, got %d", age)
}
err = db.QueryRow("SELECT|people|age,name|name=?", "Alice").Scan(&age, &name)
if err != nil {
t.Fatalf("name QueryRow+Scan: %v", err)
}
if name != "Alice" {
t.Errorf("expected name Alice, got %q", name)
}
if age != 1 {
t.Errorf("expected age 1, got %d", age)
}
var photo []byte
err = db.QueryRow("SELECT|people|photo|name=?", "Alice").Scan(&photo)
if err != nil {
t.Fatalf("photo QueryRow+Scan: %v", err)
}
want := []byte("APHOTO")
if !reflect.DeepEqual(photo, want) {
t.Errorf("photo = %q; want %q", photo, want)
}
}
func TestStatementErrorAfterClose(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age|name=?")
if err != nil {
t.Fatalf("Prepare: %v", err)
}
err = stmt.Close()
if err != nil {
t.Fatalf("Close: %v", err)
}
var name string
err = stmt.QueryRow("foo").Scan(&name)
if err == nil {
t.Errorf("expected error from QueryRow.Scan after Stmt.Close")
}
}
func TestStatementQueryRow(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age|name=?")
if err != nil {
t.Fatalf("Prepare: %v", err)
}
defer stmt.Close()
var age int
for n, tt := range []struct {
name string
want int
}{
{"Alice", 1},
{"Bob", 2},
{"Chris", 3},
} {
if err := stmt.QueryRow(tt.name).Scan(&age); err != nil {
t.Errorf("%d: on %q, QueryRow/Scan: %v", n, tt.name, err)
} else if age != tt.want {
t.Errorf("%d: age=%d, want %d", n, age, tt.want)
}
}
}
// golang.org/issue/3734
func TestStatementQueryRowConcurrent(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
stmt, err := db.Prepare("SELECT|people|age|name=?")
if err != nil {
t.Fatalf("Prepare: %v", err)
}
defer stmt.Close()
const n = 10
ch := make(chan error, n)
for i := 0; i < n; i++ {
go func() {
var age int
err := stmt.QueryRow("Alice").Scan(&age)
if err == nil && age != 1 {
err = fmt.Errorf("unexpected age %d", age)
}
ch <- err
}()
}
for i := 0; i < n; i++ {
if err := <-ch; err != nil {
t.Error(err)
}
}
}
// just a test of fakedb itself
func TestBogusPreboundParameters(t *testing.T) {
db := newTestDB(t, "foo")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
_, err := db.Prepare("INSERT|t1|name=?,age=bogusconversion")
if err == nil {
t.Fatalf("expected error")
}
if err.Error() != `fakedb: invalid conversion to int32 from "bogusconversion"` {
t.Errorf("unexpected error: %v", err)
}
}
func TestExec(t *testing.T) {
db := newTestDB(t, "foo")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Errorf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
type execTest struct {
args []interface{}
wantErr string
}
execTests := []execTest{
// Okay:
{[]interface{}{"Brad", 31}, ""},
{[]interface{}{"Brad", int64(31)}, ""},
{[]interface{}{"Bob", "32"}, ""},
{[]interface{}{7, 9}, ""},
// Invalid conversions:
{[]interface{}{"Brad", int64(0xFFFFFFFF)}, "sql: converting argument #1's type: sql/driver: value 4294967295 overflows int32"},
{[]interface{}{"Brad", "strconv fail"}, "sql: converting argument #1's type: sql/driver: value \"strconv fail\" can't be converted to int32"},
// Wrong number of args:
{[]interface{}{}, "sql: expected 2 arguments, got 0"},
{[]interface{}{1, 2, 3}, "sql: expected 2 arguments, got 3"},
}
for n, et := range execTests {
_, err := stmt.Exec(et.args...)
errStr := ""
if err != nil {
errStr = err.Error()
}
if errStr != et.wantErr {
t.Errorf("stmt.Execute #%d: for %v, got error %q, want error %q",
n, et.args, errStr, et.wantErr)
}
}
}
func TestTxPrepare(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
stmt, err := tx.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
_, err = stmt.Exec("Bobby", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
// Commit() should have closed the statement
if !stmt.closed {
t.Fatal("Stmt not closed after Commit")
}
}
func TestTxStmt(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs := tx.Stmt(stmt)
defer txs.Close()
_, err = txs.Exec("Bobby", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
// Commit() should have closed the statement
if !txs.closed {
t.Fatal("Stmt not closed after Commit")
}
}
// Issue: https://golang.org/issue/2784
// This test didn't fail before because we got lucky with the fakedb driver.
// It was failing, and now not, in github.com/bradfitz/go-sql-test
func TestTxQuery(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
exec(t, db, "INSERT|t1|name=Alice")
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
r, err := tx.Query("SELECT|t1|name|")
if err != nil {
t.Fatal(err)
}
defer r.Close()
if !r.Next() {
if r.Err() != nil {
t.Fatal(r.Err())
}
t.Fatal("expected one row")
}
var x string
err = r.Scan(&x)
if err != nil {
t.Fatal(err)
}
}
func TestTxQueryInvalid(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
_, err = tx.Query("SELECT|t1|name|")
if err == nil {
t.Fatal("Error expected")
}
}
// Tests fix for issue 4433, that retries in Begin happen when
// conn.Begin() returns ErrBadConn
func TestTxErrBadConn(t *testing.T) {
db, err := Open("test", fakeDBName+";badConn")
if err != nil {
t.Fatalf("Open: %v", err)
}
if _, err := db.Exec("WIPE"); err != nil {
t.Fatalf("exec wipe: %v", err)
}
defer closeDB(t, db)
exec(t, db, "CREATE|t1|name=string,age=int32,dead=bool")
stmt, err := db.Prepare("INSERT|t1|name=?,age=?")
if err != nil {
t.Fatalf("Stmt, err = %v, %v", stmt, err)
}
defer stmt.Close()
tx, err := db.Begin()
if err != nil {
t.Fatalf("Begin = %v", err)
}
txs := tx.Stmt(stmt)
defer txs.Close()
_, err = txs.Exec("Bobby", 7)
if err != nil {
t.Fatalf("Exec = %v", err)
}
err = tx.Commit()
if err != nil {
t.Fatalf("Commit = %v", err)
}
}
// Tests fix for issue 2542, that we release a lock when querying on
// a closed connection.
func TestIssue2542Deadlock(t *testing.T) {
db := newTestDB(t, "people")
closeDB(t, db)
for i := 0; i < 2; i++ {
_, err := db.Query("SELECT|people|age,name|")
if err == nil {
t.Fatalf("expected error")
}
}
}
// From golang.org/issue/3865
func TestCloseStmtBeforeRows(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
s, err := db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
r, err := s.Query()
if err != nil {
s.Close()
t.Fatal(err)
}
err = s.Close()
if err != nil {
t.Fatal(err)
}
r.Close()
}
// Tests fix for issue 2788, that we bind nil to a []byte if the
// value in the column is sql null
func TestNullByteSlice(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t|id=int32,name=nullstring")
exec(t, db, "INSERT|t|id=10,name=?", nil)
var name []byte
err := db.QueryRow("SELECT|t|name|id=?", 10).Scan(&name)
if err != nil {
t.Fatal(err)
}
if name != nil {
t.Fatalf("name []byte should be nil for null column value, got: %#v", name)
}
exec(t, db, "INSERT|t|id=11,name=?", "bob")
err = db.QueryRow("SELECT|t|name|id=?", 11).Scan(&name)
if err != nil {
t.Fatal(err)
}
if string(name) != "bob" {
t.Fatalf("name []byte should be bob, got: %q", string(name))
}
}
func TestPointerParamsAndScans(t *testing.T) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, "CREATE|t|id=int32,name=nullstring")
bob := "bob"
var name *string
name = &bob
exec(t, db, "INSERT|t|id=10,name=?", name)
name = nil
exec(t, db, "INSERT|t|id=20,name=?", name)
err := db.QueryRow("SELECT|t|name|id=?", 10).Scan(&name)
if err != nil {
t.Fatalf("querying id 10: %v", err)
}
if name == nil {
t.Errorf("id 10's name = nil; want bob")
} else if *name != "bob" {
t.Errorf("id 10's name = %q; want bob", *name)
}
err = db.QueryRow("SELECT|t|name|id=?", 20).Scan(&name)
if err != nil {
t.Fatalf("querying id 20: %v", err)
}
if name != nil {
t.Errorf("id 20 = %q; want nil", *name)
}
}
func TestQueryRowClosingStmt(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var name string
var age int
err := db.QueryRow("SELECT|people|age,name|age=?", 3).Scan(&age, &name)
if err != nil {
t.Fatal(err)
}
if len(db.freeConn) != 1 {
t.Fatalf("expected 1 free conn")
}
fakeConn := db.freeConn[0].ci.(*fakeConn)
if made, closed := fakeConn.stmtsMade, fakeConn.stmtsClosed; made != closed {
t.Errorf("statement close mismatch: made %d, closed %d", made, closed)
}
}
// Test issue 6651
func TestIssue6651(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var v string
want := "error in rows.Next"
rowsCursorNextHook = func(dest []driver.Value) error {
return fmt.Errorf(want)
}
defer func() { rowsCursorNextHook = nil }()
err := db.QueryRow("SELECT|people|name|").Scan(&v)
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err, want)
}
rowsCursorNextHook = nil
want = "error in rows.Close"
rowsCloseHook = func(rows *Rows, err *error) {
*err = fmt.Errorf(want)
}
defer func() { rowsCloseHook = nil }()
err = db.QueryRow("SELECT|people|name|").Scan(&v)
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err, want)
}
}
type nullTestRow struct {
nullParam interface{}
notNullParam interface{}
scanNullVal interface{}
}
type nullTestSpec struct {
nullType string
notNullType string
rows [6]nullTestRow
}
func TestNullStringParam(t *testing.T) {
spec := nullTestSpec{"nullstring", "string", [6]nullTestRow{
{NullString{"aqua", true}, "", NullString{"aqua", true}},
{NullString{"brown", false}, "", NullString{"", false}},
{"chartreuse", "", NullString{"chartreuse", true}},
{NullString{"darkred", true}, "", NullString{"darkred", true}},
{NullString{"eel", false}, "", NullString{"", false}},
{"foo", NullString{"black", false}, nil},
}}
nullTestRun(t, spec)
}
func TestNullInt64Param(t *testing.T) {
spec := nullTestSpec{"nullint64", "int64", [6]nullTestRow{
{NullInt64{31, true}, 1, NullInt64{31, true}},
{NullInt64{-22, false}, 1, NullInt64{0, false}},
{22, 1, NullInt64{22, true}},
{NullInt64{33, true}, 1, NullInt64{33, true}},
{NullInt64{222, false}, 1, NullInt64{0, false}},
{0, NullInt64{31, false}, nil},
}}
nullTestRun(t, spec)
}
func TestNullFloat64Param(t *testing.T) {
spec := nullTestSpec{"nullfloat64", "float64", [6]nullTestRow{
{NullFloat64{31.2, true}, 1, NullFloat64{31.2, true}},
{NullFloat64{13.1, false}, 1, NullFloat64{0, false}},
{-22.9, 1, NullFloat64{-22.9, true}},
{NullFloat64{33.81, true}, 1, NullFloat64{33.81, true}},
{NullFloat64{222, false}, 1, NullFloat64{0, false}},
{10, NullFloat64{31.2, false}, nil},
}}
nullTestRun(t, spec)
}
func TestNullBoolParam(t *testing.T) {
spec := nullTestSpec{"nullbool", "bool", [6]nullTestRow{
{NullBool{false, true}, true, NullBool{false, true}},
{NullBool{true, false}, false, NullBool{false, false}},
{true, true, NullBool{true, true}},
{NullBool{true, true}, false, NullBool{true, true}},
{NullBool{true, false}, true, NullBool{false, false}},
{true, NullBool{true, false}, nil},
}}
nullTestRun(t, spec)
}
func nullTestRun(t *testing.T, spec nullTestSpec) {
db := newTestDB(t, "")
defer closeDB(t, db)
exec(t, db, fmt.Sprintf("CREATE|t|id=int32,name=string,nullf=%s,notnullf=%s", spec.nullType, spec.notNullType))
// Inserts with db.Exec:
exec(t, db, "INSERT|t|id=?,name=?,nullf=?,notnullf=?", 1, "alice", spec.rows[0].nullParam, spec.rows[0].notNullParam)
exec(t, db, "INSERT|t|id=?,name=?,nullf=?,notnullf=?", 2, "bob", spec.rows[1].nullParam, spec.rows[1].notNullParam)
// Inserts with a prepared statement:
stmt, err := db.Prepare("INSERT|t|id=?,name=?,nullf=?,notnullf=?")
if err != nil {
t.Fatalf("prepare: %v", err)
}
defer stmt.Close()
if _, err := stmt.Exec(3, "chris", spec.rows[2].nullParam, spec.rows[2].notNullParam); err != nil {
t.Errorf("exec insert chris: %v", err)
}
if _, err := stmt.Exec(4, "dave", spec.rows[3].nullParam, spec.rows[3].notNullParam); err != nil {
t.Errorf("exec insert dave: %v", err)
}
if _, err := stmt.Exec(5, "eleanor", spec.rows[4].nullParam, spec.rows[4].notNullParam); err != nil {
t.Errorf("exec insert eleanor: %v", err)
}
// Can't put null val into non-null col
if _, err := stmt.Exec(6, "bob", spec.rows[5].nullParam, spec.rows[5].notNullParam); err == nil {
t.Errorf("expected error inserting nil val with prepared statement Exec")
}
_, err = db.Exec("INSERT|t|id=?,name=?,nullf=?", 999, nil, nil)
if err == nil {
// TODO: this test fails, but it's just because
// fakeConn implements the optional Execer interface,
// so arguably this is the correct behavior. But
// maybe I should flesh out the fakeConn.Exec
// implementation so this properly fails.
// t.Errorf("expected error inserting nil name with Exec")
}
paramtype := reflect.TypeOf(spec.rows[0].nullParam)
bindVal := reflect.New(paramtype).Interface()
for i := 0; i < 5; i++ {
id := i + 1
if err := db.QueryRow("SELECT|t|nullf|id=?", id).Scan(bindVal); err != nil {
t.Errorf("id=%d Scan: %v", id, err)
}
bindValDeref := reflect.ValueOf(bindVal).Elem().Interface()
if !reflect.DeepEqual(bindValDeref, spec.rows[i].scanNullVal) {
t.Errorf("id=%d got %#v, want %#v", id, bindValDeref, spec.rows[i].scanNullVal)
}
}
}
// golang.org/issue/4859
func TestQueryRowNilScanDest(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
var name *string // nil pointer
err := db.QueryRow("SELECT|people|name|").Scan(name)
want := "sql: Scan error on column index 0: destination pointer is nil"
if err == nil || err.Error() != want {
t.Errorf("error = %q; want %q", err.Error(), want)
}
}
func TestIssue4902(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
driver := db.driver.(*fakeDriver)
opens0 := driver.openCount
var stmt *Stmt
var err error
for i := 0; i < 10; i++ {
stmt, err = db.Prepare("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
err = stmt.Close()
if err != nil {
t.Fatal(err)
}
}
opens := driver.openCount - opens0
if opens > 1 {
t.Errorf("opens = %d; want <= 1", opens)
t.Logf("db = %#v", db)
t.Logf("driver = %#v", driver)
t.Logf("stmt = %#v", stmt)
}
}
// Issue 3857
// This used to deadlock.
func TestSimultaneousQueries(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
r1, err := tx.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
defer r1.Close()
r2, err := tx.Query("SELECT|people|name|")
if err != nil {
t.Fatal(err)
}
defer r2.Close()
}
func TestMaxIdleConns(t *testing.T) {
db := newTestDB(t, "people")
defer closeDB(t, db)
tx, err := db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
if got := len(db.freeConn); got != 1 {
t.Errorf("freeConns = %d; want 1", got)
}
db.SetMaxIdleConns(0)
if got := len(db.freeConn); got != 0 {
t.Errorf("freeConns after set to zero = %d; want 0", got)
}
tx, err = db.Begin()
if err != nil {
t.Fatal(err)
}
tx.Commit()
if got := len(db.freeConn); got != 0 {
t.Errorf("freeConns = %d; want 0", got)
}
}
func TestMaxOpenConns(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
defer setHookpostCloseConn(nil)
setHookpostCloseConn(func(_ *fakeConn, err error) {
if err != nil {
t.Errorf("Error closing fakeConn: %v", err)
}
})
db := newTestDB(t, "magicquery")
defer closeDB(t, db)
driver := db.driver.(*fakeDriver)
// Force the number of open connections to 0 so we can get an accurate
// count for the test
db.SetMaxIdleConns(0)
if g, w := db.numFreeConns(), 0; g != w {
t.Errorf("free conns = %d; want %d", g, w)
}
if n := db.numDepsPollUntil(0, time.Second); n > 0 {
t.Errorf("number of dependencies = %d; expected 0", n)
db.dumpDeps(t)
}
driver.mu.Lock()
opens0 := driver.openCount
closes0 := driver.closeCount
driver.mu.Unlock()
db.SetMaxIdleConns(10)
db.SetMaxOpenConns(10)
stmt, err := db.Prepare("SELECT|magicquery|op|op=?,millis=?")
if err != nil {
t.Fatal(err)
}
// Start 50 parallel slow queries.
const (
nquery = 50
sleepMillis = 25
nbatch = 2
)
var wg sync.WaitGroup
for batch := 0; batch < nbatch; batch++ {
for i := 0; i < nquery; i++ {
wg.Add(1)
go func() {
defer wg.Done()
var op string
if err := stmt.QueryRow("sleep", sleepMillis).Scan(&op); err != nil && err != ErrNoRows {
t.Error(err)
}
}()
}
// Sleep for twice the expected length of time for the
// batch of 50 queries above to finish before starting
// the next round.