tests: Add avm1/focus_remove test

This test verifies the behavior of Selection.getFocus()
when the focus is removed.

tests/tests/swfs/avm1/focus_remove/output.txt

@@ -0,0 +1,24 @@
+===== clip
+Object: _level0.clip
+Focus changed
+  old: null
+  new: _level0.clip
+Focus: _level0.clip
+Focus: null
+Focus: null
+===== text
+Object: _level0.clip.text
+Focus changed
+  old: null
+  new: _level0.clip.text
+Focus: _level0.clip.text
+Focus: null
+Focus: null
+===== button
+Object: _level0.clip.button
+Focus changed
+  old: null
+  new: _level0.clip.button
+Focus: _level0.clip.button
+Focus: null
+Focus: null

tests/tests/swfs/avm1/focus_remove/test.as

@@ -0,0 +1,48 @@
+var listener = new Object();
+listener.onSetFocus = function(oldFocus, newFocus) {
+    if (newFocus) {
+        trace("Focus changed");
+        trace("  old: " + oldFocus);
+        trace("  new: " + newFocus);
+    }
+};
+Selection.addListener(listener);
+
+function testObject(create, remove) {
+    var obj = create();
+    trace("Object: " + obj);
+    obj.focusEnabled = true;
+    Selection.setFocus(obj);
+    trace("Focus: " + Selection.getFocus());
+    remove();
+    trace("Focus: " + Selection.getFocus());
+
+    create();
+    trace("Focus: " + Selection.getFocus());
+    remove();
+}
+
+trace("===== clip");
+testObject(function() {
+    return _root.createEmptyMovieClip("clip", 2);
+}, function() {
+    _root.clip.removeMovieClip();
+});
+
+trace("===== text");
+testObject(function() {
+    var mc = _root.createEmptyMovieClip("clip", 3);
+    var tf = mc.createTextField("text", 1, 0, 0, 150, 20);
+    tf.type = "input";
+    return tf;
+}, function() {
+    _root.clip.removeMovieClip();
+});
+
+trace("===== button");
+testObject(function() {
+    var mc = _root.attachMovie("CustomButton", "clip", 3);
+    return mc.button;
+}, function() {
+    _root.clip.removeMovieClip();
+});

tests/tests/swfs/avm1/focus_remove/test.toml

@@ -0,0 +1 @@
+num_ticks = 1