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// Copyright 2014 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package utils_test
import (
"io"
"io/ioutil"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
"github.com/juju/testing/filetesting"
gc "gopkg.in/check.v1"
"github.com/juju/utils"
)
var _ = gc.Suite(&sizeSuite{})
type sizeSuite struct {
testing.IsolationSuite
}
func (*sizeSuite) TestParseSize(c *gc.C) {
type test struct {
in string
out uint64
err string
}
tests := []test{{
in: "",
err: `expected a non-negative number, got ""`,
}, {
in: "-1",
err: `expected a non-negative number, got "-1"`,
}, {
in: "1MZ",
err: `invalid multiplier suffix "MZ", expected one of MGTPEZY`,
}, {
in: "0",
out: 0,
}, {
in: "123",
out: 123,
}, {
in: "1M",
out: 1,
}, {
in: "0.5G",
out: 512,
}, {
in: "0.5GB",
out: 512,
}, {
in: "0.5GiB",
out: 512,
}, {
in: "0.5T",
out: 524288,
}, {
in: "0.5P",
out: 536870912,
}, {
in: "0.0009765625E",
out: 1073741824,
}, {
in: "1Z",
out: 1125899906842624,
}, {
in: "1Y",
out: 1152921504606846976,
}}
for i, test := range tests {
c.Logf("test %d: %+v", i, test)
size, err := utils.ParseSize(test.in)
if test.err != "" {
c.Assert(err, gc.NotNil)
c.Assert(err, gc.ErrorMatches, test.err)
} else {
c.Assert(err, gc.IsNil)
c.Assert(size, gc.Equals, test.out)
}
}
}
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)))
}
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)))
}
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)))
}
type fakeStream struct {
data string
pos uint64
}
func (f *fakeStream) Read(data []byte) (int, error) {
n := copy(data, f.data[f.pos:])
f.pos += uint64(n)
if f.pos >= uint64(len(f.data)) {
return n, io.EOF
}
return n, nil
}
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