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package bolt
import (
"errors"
"io"
"io/ioutil"
"os"
"syscall"
"testing"
"time"
"unsafe"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
)
// Ensure that a database can be opened without error.
func TestDBOpen(t *testing.T) {
withDB(func(db *DB, path string) {
err := db.Open(path, 0666)
assert.NoError(t, err)
assert.Equal(t, db.Path(), path)
})
}
// Ensure that the database returns an error if already open.
func TestDBReopen(t *testing.T) {
withDB(func(db *DB, path string) {
db.Open(path, 0666)
err := db.Open(path, 0666)
assert.Equal(t, err, DatabaseAlreadyOpenedError)
})
}
// Ensure that the database returns an error if the file handle cannot be open.
func TestDBOpenFileError(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
exp := &os.PathError{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return((*mockfile)(nil), exp)
err := db.Open(path, 0666)
assert.Equal(t, err, exp)
})
}
// Ensure that the database returns an error if the meta file handle cannot be open.
func TestDBOpenMetaFileError(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
exp := &os.PathError{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(&mockfile{}, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return((*mockfile)(nil), exp)
err := db.Open(path, 0666)
assert.Equal(t, err, exp)
})
}
// Ensure that write errors to the meta file handler during initialization are returned.
func TestDBMetaInitWriteError(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
file, metafile := &mockfile{}, &mockfile{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(file, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return(metafile, nil)
mockos.On("Getpagesize").Return(0x10000)
file.On("ReadAt", mock.Anything, int64(0)).Return(0, nil)
file.On("Stat").Return(&mockfileinfo{"", 0x10000, 0666, time.Now(), false, nil}, nil)
metafile.On("WriteAt", mock.Anything, int64(0)).Return(0, io.ErrShortWrite)
err := db.Open(path, 0666)
assert.Equal(t, err, io.ErrShortWrite)
})
}
// Ensure that a database that is too small returns an error.
func TestDBFileTooSmall(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
file, metafile := &mockfile{}, &mockfile{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(file, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return(metafile, nil)
mockos.On("Getpagesize").Return(0x1000)
file.On("ReadAt", mock.Anything, int64(0)).Return(0, nil)
file.On("Stat").Return(&mockfileinfo{"", 0x1000, 0666, time.Now(), false, nil}, nil)
metafile.On("WriteAt", mock.Anything, int64(0)).Return(0, nil)
err := db.Open(path, 0666)
assert.Equal(t, err, &Error{"file size too small", nil})
})
}
// Ensure that stat errors during mmap get returned.
func TestDBMmapStatError(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
exp := &os.PathError{}
file, metafile := &mockfile{}, &mockfile{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(file, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return(metafile, nil)
mockos.On("Getpagesize").Return(0x1000)
file.On("ReadAt", mock.Anything, int64(0)).Return(0, nil)
file.On("Stat").Return((*mockfileinfo)(nil), exp)
metafile.On("WriteAt", mock.Anything, int64(0)).Return(0, nil)
err := db.Open(path, 0666)
assert.Equal(t, err, exp)
})
}
// Ensure that mmap errors get returned.
func TestDBMmapError(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
exp := errors.New("")
file, metafile := &mockfile{}, &mockfile{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(file, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return(metafile, nil)
mockos.On("Getpagesize").Return(0x1000)
file.On("ReadAt", mock.Anything, int64(0)).Return(0, nil)
file.On("Stat").Return(&mockfileinfo{"", 0x2000, 0666, time.Now(), false, nil}, nil)
metafile.On("WriteAt", mock.Anything, int64(0)).Return(0, nil)
mocksyscall.On("Mmap", 0, int64(0), 0x2000, syscall.PROT_READ, syscall.MAP_SHARED).Return(([]byte)(nil), exp)
err := db.Open(path, 0666)
assert.Equal(t, err, exp)
})
}
// Ensure that corrupt meta0 page errors get returned.
func TestDBCorruptMeta0(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
b := make([]byte, 0x10000)
p0, p1 := (*page)(unsafe.Pointer(&b[0x0000])), (*page)(unsafe.Pointer(&b[0x8000]))
p0.init(0x8000)
p1.init(0x8000)
m, _ := p0.meta()
m.magic = 0
file, metafile := &mockfile{}, &mockfile{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(file, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return(metafile, nil)
mockos.On("Getpagesize").Return(0x10000)
file.On("ReadAt", mock.Anything, int64(0)).Return(0, nil)
file.On("Stat").Return(&mockfileinfo{"", 0x10000, 0666, time.Now(), false, nil}, nil)
metafile.On("WriteAt", mock.Anything, int64(0)).Return(0, nil)
mocksyscall.On("Mmap", 0, int64(0), 0x10000, syscall.PROT_READ, syscall.MAP_SHARED).Return(b, nil)
err := db.Open(path, 0666)
assert.Equal(t, err, &Error{"meta0 error", InvalidError})
})
}
// Ensure that corrupt meta1 page errors get returned.
func TestDBCorruptMeta1(t *testing.T) {
withMockDB(func(db *DB, mockos *mockos, mocksyscall *mocksyscall, path string) {
b := make([]byte, 0x10000)
p0, p1 := (*page)(unsafe.Pointer(&b[0x0000])), (*page)(unsafe.Pointer(&b[0x8000]))
p0.init(0x8000)
p1.init(0x8000)
m, _ := p1.meta()
m.version = 100
file, metafile := &mockfile{}, &mockfile{}
mockos.On("OpenFile", path, os.O_RDWR|os.O_CREATE, os.FileMode(0666)).Return(file, nil)
mockos.On("OpenFile", path, os.O_RDWR|os.O_SYNC, os.FileMode(0666)).Return(metafile, nil)
mockos.On("Getpagesize").Return(0x10000)
file.On("ReadAt", mock.Anything, int64(0)).Return(0, nil)
file.On("Stat").Return(&mockfileinfo{"", 0x10000, 0666, time.Now(), false, nil}, nil)
metafile.On("WriteAt", mock.Anything, int64(0)).Return(0, nil)
mocksyscall.On("Mmap", 0, int64(0), 0x10000, syscall.PROT_READ, syscall.MAP_SHARED).Return(b, nil)
err := db.Open(path, 0666)
assert.Equal(t, err, &Error{"meta1 error", VersionMismatchError})
})
}
//--------------------------------------
// Transaction()
//--------------------------------------
// Ensure that a database cannot open a transaction when it's not open.
func TestDBTransactionDatabaseNotOpenError(t *testing.T) {
withDB(func(db *DB, path string) {
txn, err := db.Transaction()
assert.Nil(t, txn)
assert.Equal(t, err, DatabaseNotOpenError)
})
}
// Ensure that a database cannot open a writable transaction while one is in progress.
func TestDBTransactionInProgressError(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.RWTransaction()
txn, err := db.RWTransaction()
assert.Nil(t, txn)
assert.Equal(t, err, TransactionInProgressError)
})
}
// Ensure that a database can create a new writable transaction.
func TestDBTransactionWriter(t *testing.T) {
withOpenDB(func(db *DB, path string) {
txn, err := db.RWTransaction()
if assert.NotNil(t, txn) {
assert.Equal(t, txn.db, db)
}
assert.NoError(t, err)
})
}
// withDB executes a function with a database reference.
func withDB(fn func(*DB, string)) {
f, _ := ioutil.TempFile("", "bolt-")
path := f.Name()
f.Close()
os.Remove(path)
defer os.RemoveAll(path)
db := NewDB()
fn(db, path)
}
// withMockDB executes a function with a database reference and a mock filesystem.
func withMockDB(fn func(*DB, *mockos, *mocksyscall, string)) {
os, syscall := &mockos{}, &mocksyscall{}
db := NewDB()
db.os = os
db.syscall = syscall
fn(db, os, syscall, "/mock/db")
}
// withOpenDB executes a function with an already opened database.
func withOpenDB(fn func(*DB, string)) {
withDB(func(db *DB, path string) {
if err := db.Open(path, 0666); err != nil {
panic("cannot open db: " + err.Error())
}
defer db.Close()
fn(db, path)
})
}
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