public void TestElementHelpers()
{
Exception e = null;
//GetAbsolutePath
SimpleElement root = new SimpleElement();
Assert.AreEqual(XmlHelper.GetAbsolutePath(root), "/");
root.Name = "root";
Assert.AreEqual(XmlHelper.GetAbsolutePath(root), "/root");
SimpleElement se = new SimpleElement("child");
se.Parent = root;
Assert.AreEqual(XmlHelper.GetAbsolutePath(se), "/root/child");
try
{
XmlHelper.GetAbsolutePath(null);
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentNullException), e);
//IsEmpty
se = new SimpleElement();
Assert.IsTrue(XmlHelper.IsEmpty(se));
se.SetString("value");
Assert.IsFalse(XmlHelper.IsEmpty(se));
se.SetString(null);
Assert.IsTrue(XmlHelper.IsEmpty(se));
se.AddElement("name");
Assert.IsFalse(XmlHelper.IsEmpty(se));
se.ElementList.Clear();
Assert.IsTrue(XmlHelper.IsEmpty(se));
se.AddAttribute("attr");
Assert.IsFalse(XmlHelper.IsEmpty(se));
//GetElement
se = new SimpleElement();
Assert.IsNull(XmlHelper.GetElement(se, "child1"));
se.AddElement("child1");
se.AddElement("child2");
Assert.IsNotNull(XmlHelper.GetElement(se, "child1"));
e = null;
try
{
XmlHelper.GetElement(se, "&invalid");
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentException), e);
//FindElement
root = new SimpleElement("root");
IXmlElement child1 = root.AddElement("child1");
IXmlElement child2 = child1.AddElement("child2");
string path = "/child1";
Assert.AreEqual(child1, XmlHelper.FindElement(root, path));
Assert.AreEqual(child1, XmlHelper.FindElement(child1, path));
path = "child2";
Assert.IsNull(XmlHelper.FindElement(root, path));
Assert.AreEqual(child2, XmlHelper.FindElement(child1, path));
path = "../child1";
Assert.IsNull(XmlHelper.FindElement(child2, path));
Assert.AreEqual(child1, XmlHelper.FindElement(child1, path));
e = null;
try
{
XmlHelper.FindElement(root, null);
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentException), e);
e = null;
try
{
XmlHelper.FindElement(root, path);
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentException), e);
//FindElement with value
root = new SimpleElement();
child1 = root.AddElement("child1");
child1.SetString("value1");
root.AddElement("child1").SetString("value2");
child2 = child1.AddElement("child2");
path = "/child1";
Assert.AreEqual(child1, XmlHelper.FindElement(root, path, "value1"));
Assert.IsNull(XmlHelper.FindElement(root, path, "valueX"));
path = "child2";
Assert.IsNull(XmlHelper.FindElement(root, path, null));
Assert.AreEqual(child2, XmlHelper.FindElement(child1, path, null));
path = "../child1";
Assert.IsNull(XmlHelper.FindElement(child2, path, null));
Assert.AreNotEqual(child1, XmlHelper.FindElement(child1, path, "value2"));
path = "child2/../child2";
Assert.IsNull(XmlHelper.FindElement(child1, path, 5));
Assert.AreEqual(child2, XmlHelper.FindElement(child1, path, null));
e = null;
try
{
XmlHelper.FindElement(null, path, null);
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentException), e);
//EnsureElement
root = new SimpleElement("root");
child1 = root.AddElement("child1");
child1.AddElement("child2");
path = "/child1";
Assert.AreEqual(root.ElementList.Count, 1);
Assert.AreEqual(child1, XmlHelper.EnsureElement(root, path));
path = "/child3";
Assert.IsNotNull(XmlHelper.EnsureElement(root, path));
Assert.AreEqual(root.ElementList.Count, 2);
path = "/child3/../child4";
Assert.IsNotNull(XmlHelper.EnsureElement(root, path));
Assert.AreEqual(root.ElementList.Count, 3);
e = null;
try
{
XmlHelper.EnsureElement(null, path);
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentException), e);
e = null;
try
{
XmlHelper.EnsureElement(root, "../child1");
}
catch (Exception ex)
{
e = ex;
}
Assert.IsNotNull(e);
Assert.IsInstanceOf(typeof(ArgumentException), e);
//AddElements
root = new SimpleElement();
Assert.AreEqual(root.ElementList.Count, 0);
IList elements = new ArrayList();
elements.Add(new SimpleElement("el1"));
elements.Add(new SimpleElement("el2"));
elements.Add(new SimpleElement("el3"));
XmlHelper.AddElements(root, elements.GetEnumerator());
Assert.AreEqual(root.ElementList.Count, 3);
//RemoveElement
root = new SimpleElement();
Assert.AreEqual(root.ElementList.Count, 0);
int result = XmlHelper.RemoveElement(root, "child");
Assert.AreEqual(result, 0);
root.AddElement("child");
root.AddElement("child");
root.AddElement("child2");
Assert.AreEqual(root.ElementList.Count, 3);
result = XmlHelper.RemoveElement(root, "child");
Assert.AreEqual(result, 2);
Assert.AreEqual(root.ElementList.Count, 1);
//ReplaceElement
root = new SimpleElement("root");
root.AddElement("child1");
root.AddElement("child2");
Assert.AreEqual(root.ElementList.Count, 2);
Assert.IsNull(root.GetElement("child1").Value);
IXmlElement replaceEl = new SimpleElement("child1", "value");
bool replaced = XmlHelper.ReplaceElement(root, replaceEl);
Assert.IsTrue(replaced);
Assert.AreEqual(root.GetElement("child1").GetString(), replaceEl.GetString());
Assert.AreEqual(root.ElementList.Count, 2);
replaceEl = new SimpleElement("child3");
replaced = XmlHelper.ReplaceElement(root, replaceEl);
Assert.IsFalse(replaced);
Assert.AreEqual(root.ElementList.Count, 3);
}
