Restructured repository

hashing_test.go

@@ -0,0 +1,81 @@
+package khepri_test
+
+import (
+	"bytes"
+	"crypto/md5"
+	"crypto/sha1"
+	"encoding/hex"
+	"hash"
+
+	"github.com/fd0/khepri"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Hashing", func() {
+	var static_tests = []struct {
+		hash   func() hash.Hash
+		text   string
+		digest string
+	}{
+		{md5.New, "foobar\n", "14758f1afd44c09b7992073ccf00b43d"},
+		// test data from http://www.nsrl.nist.gov/testdata/
+		{sha1.New, "abc", "a9993e364706816aba3e25717850c26c9cd0d89d"},
+		{sha1.New, "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", "84983e441c3bd26ebaae4aa1f95129e5e54670f1"},
+	}
+
+	Describe("Reader", func() {
+		Context("Static Strings", func() {
+			It("Should compute digest", func() {
+				for _, t := range static_tests {
+					r := khepri.NewHashingReader(bytes.NewBuffer([]byte(t.text)), t.hash)
+
+					n, err := r.Read(make([]byte, len(t.text)+1))
+
+					if n != len(t.text) {
+						Fail("not enough bytes read")
+					}
+
+					if err != nil {
+						panic(err)
+					}
+
+					digest := r.Hash()
+
+					h := hex.EncodeToString(digest)
+					Expect(h).Should(Equal(t.digest))
+				}
+			})
+		})
+
+		Context("Random Strings", func() {
+
+		})
+	})
+
+	Describe("Writer", func() {
+		Context("Static Strings", func() {
+			It("Should compute digest", func() {
+				for _, t := range static_tests {
+					var buf bytes.Buffer
+					w := khepri.NewHashingWriter(&buf, t.hash)
+
+					n, err := w.Write([]byte(t.text))
+
+					if n != len(t.text) {
+						Fail("not enough bytes written")
+					}
+
+					if err != nil {
+						panic(err)
+					}
+
+					digest := w.Hash()
+
+					h := hex.EncodeToString(digest)
+					Expect(h).Should(Equal(t.digest))
+				}
+			})
+		})
+	})
+})