您可能会发现将 XML 解析为 XmlDocument 并将您的 Assert 调用基于 XPath Query 并不那么脆弱。以下是我经常使用的一些辅助断言方法。每一个都需要一个 XPathNavigator,您可以通过在 XmlDocument 或从文档中检索的任何节点上调用 CreateNavigator() 来获得它。一个使用示例是:
XmlDocument doc = new XmlDocument( "Testdoc.xml" );
XPathNavigator nav = doc.CreateNavigator();
AssertNodeValue( nav, "/root/foo", "foo_val" );
AssertNodeCount( nav, "/root/bar", 6 )
private static void AssertNodeValue(XPathNavigator nav,
string xpath, string expected_val)
{
XPathNavigator node = nav.SelectSingleNode(xpath, nav);
Assert.IsNotNull(node, "Node '{0}' not found", xpath);
Assert.AreEqual( expected_val, node.Value );
}
private static void AssertNodeExists(XPathNavigator nav,
string xpath)
{
XPathNavigator node = nav.SelectSingleNode(xpath, nav);
Assert.IsNotNull(node, "Node '{0}' not found", xpath);
}
private static void AssertNodeDoesNotExist(XPathNavigator nav,
string xpath)
{
XPathNavigator node = nav.SelectSingleNode(xpath, nav);
Assert.IsNull(node, "Node '{0}' found when it should not exist", xpath);
}
private static void AssertNodeCount(XPathNavigator nav, string xpath, int count)
{
XPathNodeIterator nodes = nav.Select( xpath, nav );
Assert.That( nodes.Count, Is.EqualTo( count ) );
}