1 files changed, 60 insertions, 7 deletions
diff --git a/librsync/signature_test.go b/librsync/signature_test.go
index 6b76acd..152fd12 100644
--- a/librsync/signature_test.go
+++ b/librsync/signature_test.go
@@ -2,26 +2,79 @@ package librsync
 
 import (
 	"bytes"
+	"fmt"
 	"github.com/kch42/golibrsync/librsync/testdata"
 	"io"
+	"os"
 	"testing"
 )
 
-func TestSignature(t *testing.T) {
-	data := bytes.NewReader(testdata.RandomData())
+func dump(r io.Reader) (string, error) {
+	path := fmt.Sprintf("%s%cgolibrsync_test", os.TempDir(), os.PathSeparator)
+	file, err := os.Create(path)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	if _, err = io.Copy(file, r); err != nil {
+		return "", err
+	}
+
+	return path, nil
+}
+
+func TestSignatureDeltaPatch(t *testing.T) {
+	// Generate signature
+	orig := bytes.NewReader(testdata.RandomData())
 
-	buffer := new(bytes.Buffer)
-	siggen, err := NewDefaultSignatureGen(data)
+	sigbuf := new(bytes.Buffer)
+	siggen, err := NewDefaultSignatureGen(orig)
 	if err != nil {
 		t.Fatalf("could not create a signature generator: %s", err)
 	}
 	defer siggen.Close()
 
-	if _, err = io.Copy(buffer, siggen); err != nil {
+	if _, err = io.Copy(sigbuf, siggen); err != nil {
 		t.Fatalf("Creating the signature failed: %s", err)
 	}
 
-	if !bytes.Equal(buffer.Bytes(), testdata.RandomDataSig()) {
-		t.Error("Signatures do not match")
+	if !bytes.Equal(sigbuf.Bytes(), testdata.RandomDataSig()) {
+		if path, err := dump(sigbuf); err == nil {
+			t.Fatalf("Signatures do not match. Generated signature dumped to %s", path)
+		} else {
+			t.Fatalf("Signatures do not match. Could not dump signature: %s", err)
+		}
+	}
+
+	// Loading signature
+	sig, err := LoadSignature(sigbuf)
+	if err != nil {
+		t.Fatalf("Loading signature failed: %s", err)
 	}
+	defer sig.Close()
+
+	// Generate delta
+	mutation := bytes.NewReader(testdata.Mutation())
+
+	deltabuf := new(bytes.Buffer)
+	deltagen, err := NewDeltaGen(sig, mutation)
+	if err != nil {
+		t.Fatalf("could not create a delta generator: %s", err)
+	}
+	defer deltagen.Close()
+
+	if _, err = io.Copy(deltabuf, deltagen); err != nil {
+		t.Fatalf("Creating the delta failed: %s", err)
+	}
+
+	if !bytes.Equal(deltabuf.Bytes(), testdata.Delta()) {
+		if path, err := dump(deltabuf); err == nil {
+			t.Fatalf("deltas do not match. Generated delta dumped to %s", path)
+		} else {
+			t.Fatalf("deltas do not match. Could not dump delta: %s", err)
+		}
+	}
+
+	// TODO: Test patching
 }