Esempio n. 1
0
func (*sizeSuite) TestSizingReaderOkay(c *gc.C) {
	expected := "some data"
	stub := &testing.Stub{}
	reader := filetesting.NewStubReader(stub, expected)

	var st utils.SizeTracker
	sizingReader := io.TeeReader(reader, &st)
	data, err := ioutil.ReadAll(sizingReader)
	c.Assert(err, jc.ErrorIsNil)

	stub.CheckCallNames(c, "Read", "Read")
	c.Check(string(data), gc.Equals, expected)
	c.Check(st.Size(), gc.Equals, int64(len(expected)))
}
Esempio n. 2
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func (*sizeSuite) TestSizingWriter(c *gc.C) {
	expected := "some data"
	stub := &testing.Stub{}
	writer, buffer := filetesting.NewStubWriter(stub)

	var st utils.SizeTracker
	sizingWriter := io.MultiWriter(writer, &st)
	n, err := sizingWriter.Write([]byte(expected))
	c.Assert(err, jc.ErrorIsNil)

	stub.CheckCallNames(c, "Write")
	c.Check(n, gc.Equals, len(expected))
	c.Check(buffer.String(), gc.Equals, expected)
	c.Check(st.Size(), gc.Equals, int64(len(expected)))
}
Esempio n. 3
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func (*sizeSuite) TestSizingReaderMixedEOF(c *gc.C) {
	expected := "some data"
	stub := &testing.Stub{}
	reader := &filetesting.StubReader{
		Stub: stub,
		ReturnRead: &fakeStream{
			data: expected,
		},
	}

	var st utils.SizeTracker
	sizingReader := io.TeeReader(reader, &st)
	data, err := ioutil.ReadAll(sizingReader)
	c.Assert(err, jc.ErrorIsNil)

	stub.CheckCallNames(c, "Read") // The EOF was mixed with the data.
	c.Check(string(data), gc.Equals, expected)
	c.Check(st.Size(), gc.Equals, int64(len(expected)))
}
Esempio n. 4
0
// GenerateContent returns a new Content for the given data stream.
func GenerateContent(reader io.ReadSeeker) (Content, error) {
	var sizer utils.SizeTracker
	sizingReader := io.TeeReader(reader, &sizer)
	fp, err := charmresource.GenerateFingerprint(sizingReader)
	if err != nil {
		return Content{}, errors.Trace(err)
	}
	if _, err := reader.Seek(0, os.SEEK_SET); err != nil {
		return Content{}, errors.Trace(err)
	}
	size := sizer.Size()

	content := Content{
		Data:        reader,
		Size:        size,
		Fingerprint: fp,
	}
	return content, nil
}