tests: Test RegExp toString behavior

tests/tests/swfs/avm2/regexp_toString/Test.as

@@ -0,0 +1,28 @@
+package {
+    import flash.display.Sprite;
+    public class Test extends Sprite {
+        public function Test() {
+        }
+    }
+}
+
+var regexp = /abc/xsmig;
+
+trace("// trace(regexp)");
+trace(regexp);
+
+trace("// regexp.toString()");
+trace(regexp.toString());
+
+trace("// RegExp.prototype.toString.call(regexp)");
+trace(RegExp.prototype.toString.call(regexp));
+
+trace("// Object.prototype.toString.call(regexp)");
+trace(Object.prototype.toString.call(regexp));
+
+trace("// RegExp.prototype.toString.call({})");
+try {
+    RegExp.prototype.toString.call({});
+} catch (e) {
+    trace(e);
+}

tests/tests/swfs/avm2/regexp_toString/output.txt

@@ -0,0 +1,10 @@
+// trace(regexp)
+/abc/gimsx
+// regexp.toString()
+/abc/gimsx
+// RegExp.prototype.toString.call(regexp)
+/abc/gimsx
+// Object.prototype.toString.call(regexp)
+[object RegExp]
+// RegExp.prototype.toString.call({})
+TypeError: Error #1034: Type Coercion failed: cannot convert Object@00000000000 to RegExp.

tests/tests/swfs/avm2/regexp_toString/test.toml

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