示例#1
0
func (s *preallocSuite) TestPreallocFilesWriteErrors(c *gc.C) {
	dir := c.MkDir()
	prefix := filepath.Join(dir, "test.")
	err := ioutil.WriteFile(prefix+"0", nil, 0644)
	c.Assert(err, gc.IsNil)
	err = ioutil.WriteFile(prefix+"1", nil, 0644)
	c.Assert(err, gc.IsNil)

	var called int
	s.PatchValue(mongo.PreallocFile, func(filename string, size int) (bool, error) {
		var created bool
		var err error
		called++
		if called == 2 {
			created = true
			err = fmt.Errorf("failed to zero test.1")
		}
		return created, err
	})

	err = mongo.PreallocFiles(prefix, 4096, 8192)
	c.Assert(err, gc.ErrorMatches, "failed to zero test.1")

	// test.0 still exists because we said we didn't
	// create it (i.e. it already existed)
	_, err = os.Stat(prefix + "0")
	c.Assert(err, gc.IsNil)

	// test.1 no longer exists because we said we created
	// it, but then failed to write to it.
	_, err = os.Stat(prefix + "1")
	c.Assert(err, jc.Satisfies, os.IsNotExist)
}
示例#2
0
func (s *preallocSuite) TestPreallocFiles(c *gc.C) {
	dir := c.MkDir()
	prefix := filepath.Join(dir, "test.")
	err := mongo.PreallocFiles(prefix, 0, 4096, 8192)
	c.Assert(err, gc.IsNil)

	zeroes := [8192]byte{}
	for i := 0; i < 3; i++ {
		filename := fmt.Sprintf("%s%d", prefix, i)
		data, err := ioutil.ReadFile(filename)
		c.Check(err, gc.IsNil)
		c.Check(data, gc.DeepEquals, zeroes[:i*4096])
	}

	_, err = os.Stat(prefix + "3")
	c.Assert(err, jc.Satisfies, os.IsNotExist)
}
示例#3
0
func (s *preallocSuite) TestPreallocFilesErrors(c *gc.C) {
	err := mongo.PreallocFiles("", 123)
	c.Assert(err, gc.ErrorMatches, `specified size 123 for file "0" is not a multiple of 4096`)
}