testsuite: more focus-chain output

Differentiate between wrapping around and
stopping at the end of the focus chain.

Update the existing tests, and add two
new ones where the difference matters.

testsuite/gtk/focus-chain/basic.left

@@ -0,0 +1,3 @@
+entry2 GtkText
+entry1 GtkText
+STOP

testsuite/gtk/focus-chain/basic.right

@@ -0,0 +1,3 @@
+entry1 GtkText
+entry2 GtkText
+STOP

testsuite/gtk/focus-chain/basic.tab

@@ -1,2 +1,3 @@
 entry1 GtkText
 entry2 GtkText
+WRAP

testsuite/gtk/focus-chain/basic.tab-backward

@@ -1,2 +1,3 @@
 entry2 GtkText
 entry1 GtkText
+WRAP

testsuite/gtk/meson.build

@@ -134,6 +134,8 @@ focus_chain_tests = [
   # test     direction
   [ 'basic', 'tab' ],
   [ 'basic', 'tab-backward' ],
+  [ 'basic', 'left' ],
+  [ 'basic', 'right' ],
 ]
 
 focus_chain = executable(

testsuite/gtk/test-focus-chain.c

@@ -123,10 +123,16 @@ generate_focus_chain (GtkWidget        *window,
         name = g_strdup ("NONE");
 
       if (first && g_str_equal (name, first))
-        break; /* cycle completed */
+        {
+          g_string_append (output, "WRAP\n");
+          break; /* cycle completed */
+        }
 
       if (last && g_str_equal (name, last))
-        break; /* dead end */
+        {
+          g_string_append (output, "STOP\n");
+          break; /* dead end */
+        }
 
       g_string_append_printf (output, "%s\n", name);