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PosixTest.WriteStartsPastEndOfFile_AppendMode

geesefs-0-30-9
Aaron Jacobs 2015-03-18 16:13:28 +11:00
parent 68d48f6197
commit e011f89d97
1 changed files with 29 additions and 0 deletions
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29
samples/memfs/posix_test.go
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@ -159,6 +159,35 @@ func (t *PosixTest) WriteStartsPastEndOfFile() {
ExpectEq("\x00\x00taco", string(contents))
}
func (t *PosixTest) WriteStartsPastEndOfFile_AppendMode() {
var err error
var n int
// Create a file.
f, err := os.OpenFile(
path.Join(t.dir, "foo"),
os.O_RDWR|os.O_APPEND|os.O_CREATE,
0600)
t.toClose = append(t.toClose, f)
AssertEq(nil, err)
// Write three bytes.
n, err = f.Write([]byte("111"))
AssertEq(nil, err)
AssertEq(3, n)
// Write at offset six.
n, err = f.WriteAt([]byte("222"), 6)
AssertEq(nil, err)
AssertEq(3, n)
// Read the full contents of the file.
contents, err := ioutil.ReadFile(f.Name())
AssertEq(nil, err)
ExpectEq("111\x00\x00\x00222", string(contents))
}
func (t *PosixTest) WriteAtDoesntChangeOffset_NotAppendMode() {
var err error
var n int