[gtk/rtl-margins] Add a reftest for box flipping

[Matthias Clasen <matthiasc src gnome org>]

commit bbfaacb59872c1de1a84d5ec0eb89573ef4ce055
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jan 15 18:42:20 2021 -0500

    Add a reftest for box flipping
    
    Test that a horizontal box changes the order of its
    children in RTL, and that widget margins flip start
    and end.
    
    This tests the fix in d89ff7181941d202d2.

 testsuite/reftests/box-flip.css    | 23 +++++++++++++++++++++++
 testsuite/reftests/box-flip.ref.ui | 28 ++++++++++++++++++++++++++++
 testsuite/reftests/box-flip.ui     | 30 ++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)
---
diff --git a/testsuite/reftests/box-flip.css b/testsuite/reftests/box-flip.css
new file mode 100644
index 0000000000..ffda8b0003
--- /dev/null
+++ b/testsuite/reftests/box-flip.css
@@ -0,0 +1,23 @@
+@import "reset-to-defaults.css";
+
+window {
+  background-color: purple;
+}
+
+#red {
+  background-color: red;
+  min-width: 100px;
+  min-height: 100px;
+}
+
+#yellow {
+  background-color: yellow;
+  min-width: 100px;
+  min-height: 100px;
+}
+
+#green {
+  background-color: green;
+  min-width: 100px;
+  min-height: 100px;
+}
diff --git a/testsuite/reftests/box-flip.ref.ui b/testsuite/reftests/box-flip.ref.ui
new file mode 100644
index 0000000000..d962c80327
--- /dev/null
+++ b/testsuite/reftests/box-flip.ref.ui
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <object class="GtkWindow" id="window1">
+    <property name="decorated">0</property>
+    <property name="resizable">0</property>
+    <child>
+      <object class="GtkBox">
+        <child>
+          <object class="GtkDrawingArea">
+            <property name="name">green</property>
+            <property name="margin-end">50</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkDrawingArea">
+            <property name="name">yellow</property>
+            <property name="margin-end">10</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkDrawingArea">
+            <property name="name">red</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>
diff --git a/testsuite/reftests/box-flip.ui b/testsuite/reftests/box-flip.ui
new file mode 100644
index 0000000000..8de1030f31
--- /dev/null
+++ b/testsuite/reftests/box-flip.ui
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <object class="GtkWindow" id="window1">
+    <property name="decorated">0</property>
+    <property name="resizable">0</property>
+    <signal name="map" handler="reftest:set_default_direction_rtl" swapped="no"/>
+    <signal name="destroy" handler="reftest:set_default_direction_ltr" swapped="no"/>
+    <child>
+      <object class="GtkBox">
+        <child>
+          <object class="GtkDrawingArea">
+            <property name="name">red</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkDrawingArea">
+            <property name="name">yellow</property>
+            <property name="margin-start">10</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkDrawingArea">
+            <property name="margin-start">50</property>
+            <property name="name">green</property>
+          </object>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>