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// Copyright ©2011-2012 The bíogo Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package util
import (
"bytes"
"crypto/md5"
"fmt"
"io/ioutil"
"os"
"os/exec"
"gopkg.in/check.v1"
)
// Tests
func (s *S) TestHash(c *check.C) {
// FIXME: This will not work with MacOS.
_, err := exec.LookPath("md5sum")
if err != nil {
c.Skip(err.Error())
}
md5sum := exec.Command("md5sum", "./files_test.go")
b := &bytes.Buffer{}
md5sum.Stdout = b
err = md5sum.Run()
if err != nil {
c.Fatal(err)
}
f, err := os.Open("./files_test.go")
if err != nil {
c.Fatalf("%v %s", md5sum, err)
}
x, err := ioutil.ReadAll(f)
if err != nil {
c.Fatal(err)
}
f.Seek(0, 0)
md5hash, err := Hash(md5.New(), f)
if err != nil {
c.Fatal(err)
}
md5string := fmt.Sprintf("%x .*\n", md5hash)
c.Check(string(b.Bytes()), check.Matches, md5string)
y, err := ioutil.ReadAll(f)
if err != nil {
c.Fatal(err)
}
c.Check(x, check.DeepEquals, y)
}
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