@@ -1,10 +1,11 @@
 package predictor
 
 import (
 	diff "0dev.org/diff"
 	"bytes"
+	"io/ioutil"
 	"testing"
 )
 
 func TestRFC(t *testing.T) {
 	input := []byte{0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x0a,
@@ -34,11 +35,21 @@
 	if err != nil {
 		t.Error(err)
 	}
 
 	result := buf.Bytes()
-	delta := diff.Diff(diff.D{len(result), len(output), func(i, j int) bool { return result[i] == output[i] }})
+	delta := diff.Diff(diff.D{len(result), len(output), func(i, j int) bool { return result[i] == output[j] }})
+
+	if len(delta.Added) > 0 || len(delta.Removed) > 0 {
+		t.Error("Unexpected compressed output", delta)
+	}
+
+	data := bytes.NewBuffer(result)
+	in := Decompressor(data)
+
+	result, err = ioutil.ReadAll(in)
+	delta = diff.Diff(diff.D{len(result), len(input), func(i, j int) bool { return result[i] == input[j] }})
 
 	if len(delta.Added) > 0 || len(delta.Removed) > 0 {
 		t.Error("Unexpected compressed output", delta)
 	}
 }