diff --git a/testdata/dot-ref/ViewChildEmpty.dot b/testdata/dot-ref/ViewChildEmpty.dot
new file mode 100644
index 0000000..9a04f45
--- /dev/null
+++ b/testdata/dot-ref/ViewChildEmpty.dot
@@ -0,0 +1,17 @@
+#!/usr/local/bin/dot
+#
+# Class diagram 
+# Generated by UmlGraph version 4.1 (http://www.spinellis.gr/sw/umlgraph)
+#
+
+digraph G {
+	edge [fontname="Helvetica",fontsize=10,labelfontname="Helvetica",labelfontsize=10];
+	node [fontname="Helvetica",fontsize=10,shape=record];
+	// gr.spinellis.product.Product
+	c146 [label="Product", fontname="Helvetica", style=filled, fillcolor="LemonChiffon", fontcolor="black", fontsize=10.0];
+	// gr.spinellis.product.Category
+	c147 [label="Category", fontname="Helvetica", style=filled, fillcolor="LemonChiffon", fontcolor="black", fontsize=10.0];
+	// gr.spinellis.product.Product assoc gr.spinellis.product.Category
+	c146 -> c147 [taillabel="*", label="", headlabel="1", fontname="Helvetica", fontcolor="black", fontsize=10.0, color="black", arrowhead=none];
+}
+
diff --git a/testdata/dot-ref/ViewChildOverride.dot b/testdata/dot-ref/ViewChildOverride.dot
new file mode 100644
index 0000000..caeac7a
--- /dev/null
+++ b/testdata/dot-ref/ViewChildOverride.dot
@@ -0,0 +1,17 @@
+#!/usr/local/bin/dot
+#
+# Class diagram 
+# Generated by UmlGraph version 4.1 (http://www.spinellis.gr/sw/umlgraph)
+#
+
+digraph G {
+	edge [fontname="Helvetica",fontsize=10,labelfontname="Helvetica",labelfontsize=10];
+	node [fontname="Helvetica",fontsize=10,shape=record];
+	// gr.spinellis.product.Product
+	c132 [label="{Product\n|name\lstock\lprice\lcategory\l|}", fontname="Helvetica", style=filled, fillcolor="LemonChiffon", fontcolor="black", fontsize=10.0];
+	// gr.spinellis.product.Category
+	c133 [label="Category", fontname="Helvetica", style=filled, fillcolor="brown", fontcolor="black", fontsize=10.0];
+	// gr.spinellis.product.Product assoc gr.spinellis.product.Category
+	c132 -> c133 [taillabel="*", label="", headlabel="1", fontname="Helvetica", fontcolor="black", fontsize=10.0, color="black", arrowhead=none];
+}
+
diff --git a/testdata/java/gr/spinellis/views/ViewAbstract.java b/testdata/java/gr/spinellis/views/ViewAbstract.java
new file mode 100644
index 0000000..ce70e2f
--- /dev/null
+++ b/testdata/java/gr/spinellis/views/ViewAbstract.java
@@ -0,0 +1,15 @@
+package gr.spinellis.views;
+
+/**
+ * @view
+ * @opt hide
+ *  
+ * @match gr.spinellis.product.* 
+ * @opt !hide
+ * @match gr.spinellis.*
+ * @opt nodefillcolor LemonChiffon 
+ */
+public abstract class ViewAbstract {
+}
+
+
diff --git a/testdata/java/gr/spinellis/views/ViewChildEmpty.java b/testdata/java/gr/spinellis/views/ViewChildEmpty.java
new file mode 100644
index 0000000..3e51c53
--- /dev/null
+++ b/testdata/java/gr/spinellis/views/ViewChildEmpty.java
@@ -0,0 +1,7 @@
+package gr.spinellis.views;
+
+/**
+ * @view
+ */
+public class ViewChildEmpty extends ViewAbstract {
+}
diff --git a/testdata/java/gr/spinellis/views/ViewChildOverride.java b/testdata/java/gr/spinellis/views/ViewChildOverride.java
new file mode 100644
index 0000000..73f362f
--- /dev/null
+++ b/testdata/java/gr/spinellis/views/ViewChildOverride.java
@@ -0,0 +1,13 @@
+package gr.spinellis.views;
+
+/**
+ * @view
+ * 
+ * @opt nodefillcolor LightGray
+ * @match gr.spinellis.product.Product
+ * @opt attributes
+ * @match gr.spinellis.product.Category
+ * @opt nodefillcolor brown
+ */
+public class ViewChildOverride extends ViewAbstract {
+}