dotnet/test/common/StaleElementReferenceTest.cs

// <copyright file="StaleElementReferenceTest.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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using NUnit.Framework;
using System.Drawing;

namespace OpenQA.Selenium;

[TestFixture]
public class StaleElementReferenceTest : DriverTestFixture
{
    [Test]
    public void OldPage()
    {
        driver.Url = simpleTestPage;
        IWebElement elem = driver.FindElement(By.Id("links"));
        driver.Url = xhtmlTestPage;
        Assert.That(() => elem.Click(), Throws.InstanceOf<StaleElementReferenceException>());
    }

    [Test]
    public void ShouldNotCrashWhenCallingGetSizeOnAnObsoleteElement()
    {
        driver.Url = simpleTestPage;
        IWebElement elem = driver.FindElement(By.Id("links"));
        driver.Url = xhtmlTestPage;
        Assert.That(() => { Size elementSize = elem.Size; }, Throws.InstanceOf<StaleElementReferenceException>());
    }

    [Test]
    public void ShouldNotCrashWhenQueryingTheAttributeOfAStaleElement()
    {
        driver.Url = xhtmlTestPage;
        IWebElement heading = driver.FindElement(By.XPath("//h1"));
        driver.Url = simpleTestPage;
        Assert.That(() => { string className = heading.GetAttribute("class"); }, Throws.InstanceOf<StaleElementReferenceException>());
    }

    [Test]
    public void RemovingAnElementDynamicallyFromTheDomShouldCauseAStaleRefException()
    {
        driver.Url = javascriptPage;

        IWebElement toBeDeleted = driver.FindElement(By.Id("deleted"));
        Assert.That(toBeDeleted.Displayed, Is.True);

        driver.FindElement(By.Id("delete")).Click();

        bool wasStale = WaitFor(() =>
        {
            try
            {
                string tagName = toBeDeleted.TagName;
                return false;
            }
            catch (StaleElementReferenceException)
            {
                return true;
            }
        }, "Element did not become stale.");
        Assert.That(wasStale, Is.True, "Element should be stale at this point");
    }
}