func (s *FingerprintSuite) TestGenerateFingerprintOkay(c *gc.C) {
expected, _ := newFingerprint(c, "spamspamspam")
s.hash.ReturnSum = expected
s.hash.Writer, _ = filetesting.NewStubWriter(s.stub)
reader := filetesting.NewStubReader(s.stub, "spamspamspam")
fp, err := hash.GenerateFingerprint(reader, s.newHash)
c.Assert(err, jc.ErrorIsNil)
sum := fp.Bytes()
s.stub.CheckCallNames(c, "newHash", "Read", "Write", "Read", "Sum")
c.Check(sum, jc.DeepEquals, expected)
}
func (s *HashSuite) TestHashingWriter(c *gc.C) {
data := "some data"
newHash, _ := hash.SHA384()
expected, err := hash.GenerateFingerprint(strings.NewReader(data), newHash)
c.Assert(err, jc.ErrorIsNil)
var writer bytes.Buffer
h := newHash()
hashingWriter := io.MultiWriter(&writer, h)
_, err = hashingWriter.Write([]byte(data))
c.Assert(err, jc.ErrorIsNil)
fp := hash.NewValidFingerprint(h)
c.Check(fp, jc.DeepEquals, expected)
c.Check(writer.String(), gc.Equals, data)
}
func (s *FingerprintSuite) TestGenerateFingerprintNil(c *gc.C) {
_, err := hash.GenerateFingerprint(nil, s.newHash)
s.stub.CheckNoCalls(c)
c.Check(err, gc.ErrorMatches, `missing reader`)
}
