tests: Add edittext_paste_empty test

This test verifies how FP behaves when pasting with an empty clipboard.

Author: kjarosh

tests/tests/swfs/avm1/edittext_paste_empty/input.json

@@ -0,0 +1,9 @@
+[
+    { "type": "SetClipboardText", "text": "test" },
+    { "type": "TextControl", "code": "Paste" },
+    { "type": "KeyDown", "key_code": 27 },
+    { "type": "SetClipboardText", "text": "" },
+    { "type": "TextControl", "code": "SelectAll" },
+    { "type": "TextControl", "code": "Paste" },
+    { "type": "KeyDown", "key_code": 27 }
+]

tests/tests/swfs/avm1/edittext_paste_empty/output.txt

@@ -0,0 +1,2 @@
+Text: 'test'
+Text: 'test'

tests/tests/swfs/avm1/edittext_paste_empty/test.as

@@ -0,0 +1,9 @@
+var listener = new Object();
+listener.onKeyDown = function() {
+    if (Key.getCode() == 27) {
+        trace("Text: '" + text.text + "'");
+    }
+};
+Key.addListener(listener);
+
+Selection.setFocus(text);

tests/tests/swfs/avm1/edittext_paste_empty/test.swf

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