jscript: Added String.valueOf implementation.

dlls/jscript/string.c

@@ -114,11 +114,13 @@ static HRESULT String_toString(DispatchEx *dispex, LCID lcid, WORD flags, DISPPA
     return S_OK;
 }
 
+/* ECMA-262 3rd Edition    15.5.4.2 */
 static HRESULT String_valueOf(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    TRACE("\n");
+
+    return String_toString(dispex, lcid, flags, dp, retv, ei, sp);
 }
 
 static HRESULT String_anchor(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,

dlls/jscript/tests/api.js

@@ -33,6 +33,13 @@ ok(tmp === "test", "''.toString() = " + tmp);
 tmp = "test".toString(3);
 ok(tmp === "test", "''.toString(3) = " + tmp);
 
+tmp = "".valueOf();
+ok(tmp === "", "''.valueOf() = " + tmp);
+tmp = "test".valueOf();
+ok(tmp === "test", "''.valueOf() = " + tmp);
+tmp = "test".valueOf(3);
+ok(tmp === "test", "''.valueOf(3) = " + tmp);
+
 tmp = "abc".charAt(0);
 ok(tmp === "a", "'abc',charAt(0) = " + tmp);
 tmp = "abc".charAt(1);