add test for diff parser

parser/diff/parser_test.go

@@ -0,0 +1,40 @@
+package diff
+
+import (
+	"io"
+	"testing"
+)
+
+func TestParse(t *testing.T) {
+	p, err := NewOscGzParser("612.osc.gz")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p.SetWithMetadata(true)
+
+	e, err := p.Next()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if e.Add || !e.Mod || e.Del {
+		t.Error("element not parsed as modify", e)
+	}
+	if e.Node == nil || e.Node.Id != 25594547 {
+		t.Error("node not parsed correctly", e)
+	}
+	if md := e.Node.Metadata; md == nil || md.Version != 3 {
+		t.Error("metadata not parsed", md)
+	}
+	for {
+		_, err := p.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+
+}