[gtk] Add a testcase

[Matthias Clasen <matthiasc src gnome org>]

commit 2eb033301784a9f02e4d846dc35a8db12726ab3c
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu May 30 12:24:18 2019 +0000

    Add a testcase
    
    This tests the fix in 1e7225aa1c20525da0.

 testsuite/tools/simplify-data-3to4/nm-crash.expected | 16 ++++++++++++++++
 testsuite/tools/simplify-data-3to4/nm-crash.ui       | 12 ++++++++++++
 2 files changed, 28 insertions(+)
---
diff --git a/testsuite/tools/simplify-data-3to4/nm-crash.expected 
b/testsuite/tools/simplify-data-3to4/nm-crash.expected
new file mode 100644
index 0000000000..a5b531f01a
--- /dev/null
+++ b/testsuite/tools/simplify-data-3to4/nm-crash.expected
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface domain="nm-applet">
+  <object class="GtkAssistant">
+    <child>
+      <object class="GtkAssistantPage">
+        <property name="page_type">confirm</property>
+        <property name="complete">True</property>
+        <property name="child">
+          <object class="GtkBox" id="confirm_page">
+            <property name="visible">0</property>
+          </object>
+        </property>
+      </object>
+    </child>
+  </object>
+</interface>
diff --git a/testsuite/tools/simplify-data-3to4/nm-crash.ui b/testsuite/tools/simplify-data-3to4/nm-crash.ui
new file mode 100644
index 0000000000..d8bad14dec
--- /dev/null
+++ b/testsuite/tools/simplify-data-3to4/nm-crash.ui
@@ -0,0 +1,12 @@
+<interface domain="nm-applet">
+  <object class="GtkAssistant">
+    <child>
+      <object class="GtkBox" id="confirm_page">
+      </object>
+      <packing>
+        <property name="page_type">confirm</property>
+        <property name="complete">True</property>
+      </packing>
+    </child>
+  </object>
+</interface>