msxml3: Implement IXMLDOMComment_appendData.

dlls/msxml3/comment.c

@@ -583,8 +583,32 @@ static HRESULT WINAPI domcomment_appendData(
     IXMLDOMComment *iface,
     BSTR p)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    domcomment *This = impl_from_IXMLDOMComment( iface );
+    xmlnode *pDOMNode = impl_from_IXMLDOMNode( This->node );
+    xmlChar *pContent;
+    HRESULT hr = S_FALSE;
+
+    TRACE("%p\n", iface);
+
+    /* Nothing to do if NULL or an Empty string passed in. */
+    if(p == NULL || SysStringLen(p) == 0)
+        return S_OK;
+
+    pContent = xmlChar_from_wchar( (WCHAR*)p );
+    if(pContent)
+    {
+        if(xmlTextConcat(pDOMNode->node, pContent, SysStringLen(p) ) == 0)
+            hr = S_OK;
+        else
+        {
+            hr = E_FAIL;
+            xmlFree(pContent);
+        }
+    }
+    else
+        hr = E_FAIL;
+
+    return hr;
 }
 
 static HRESULT WINAPI domcomment_insertData(

dlls/msxml3/tests/domdoc.c

@@ -2283,6 +2283,21 @@ static void test_xmlTypes(void)
                 ok( !lstrcmpW( str, _bstr_("\\") ), "incorrect substringData string\n");
                 SysFreeString(str);
 
+                /* test appendData */
+                hr = IXMLDOMComment_appendData(pComment, NULL);
+                ok(hr == S_OK, "ret %08x\n", hr );
+
+                hr = IXMLDOMComment_appendData(pComment, _bstr_(""));
+                ok(hr == S_OK, "ret %08x\n", hr );
+
+                hr = IXMLDOMComment_appendData(pComment, _bstr_("Append"));
+                ok(hr == S_OK, "ret %08x\n", hr );
+
+                hr = IXMLDOMComment_get_text(pComment, &str);
+                ok(hr == S_OK, "ret %08x\n", hr );
+                ok( !lstrcmpW( str, _bstr_("This &is a ; test <>\\Append") ), "incorrect get_text string\n");
+                SysFreeString(str);
+
                 IXMLDOMComment_Release(pComment);
             }