Sunday, January 13, 2013

WebElement Form Extensions for WebDriver

I really like Selenium 2.0!

I've been working a lot on a side project involving WebDriver, and thus I have been creating a few extension methods for working with form data that I thought others might find helpful:

  • bool IsSelected(this IWebElement element)
  • bool IsChecked(this IWebElement element)
  • void SetChecked(this IWebElement element)
  • void SetUnchecked(this IWebElement element)
  • IWebElement GetOptionByValue(this IWebElement element, string value)
  • IWebElement GetOptionByText(this IWebElement element, string text)

Extension Methods

public static class WebElementExtensions
{
    private static readonly StringComparer DefaultComparer =
        StringComparer.InvariantCultureIgnoreCase;
 
    private static readonly string[] Selected = new[] { "true", "selected" };
 
    public static bool IsSelected(this IWebElement element)
    {
        var attribute = element.GetAttribute("selected");
        return Selected.Contains(attribute, DefaultComparer);
    }
 
    private static readonly string[] Checked = new[] { "true", "checked" };
 
    public static bool IsChecked(this IWebElement element)
    {
        var attribute = element.GetAttribute("checked");
        return Checked.Contains(attribute, DefaultComparer);
    }
 
    public static void SetChecked(this IWebElement element)
    {
        if (!element.IsChecked())
            element.Click();
    }
 
    public static void SetUnchecked(this IWebElement element)
    {
        if (element.IsChecked())
            element.Click();
    }
 
    private const StringComparison DefaultComparison = 
        StringComparison.InvariantCultureIgnoreCase;
 
    public static IWebElement GetOptionByValue(
        this IWebElement element, 
        string value)
    {
        return element.GetOption(
            o => value.Equals(o.GetAttribute("value"), DefaultComparison));
    }
 
    public static IWebElement GetOptionByText(
        this IWebElement element, 
        string text)
    {
        return element.GetOption(o => text.Equals(o.Text, DefaultComparison));
    }
 
    private static IWebElement GetOption(
        this IWebElement element, 
        Func<IWebElement, bool> predicate)
    {
        return element
            .FindElements(By.CssSelector("option"))
            .FirstOrDefault(predicate);
    }
}

Unit Tests

public class WebElementExtensionTests : IDisposable
{
    public IWebDriver Driver { get; private set; }
 
    public WebElementExtensionTests()
    {
        Driver = new ChromeDriver("C:/Code/Drivers");
        Driver.Url = "file:///C:/Code/WebDriverTests/TestPage.htm";
    }
 
    public void Dispose()
    {
        Driver.Dispose();
    }
 
    [Fact]
    public void RadioTests()
    {
        var e1 = Driver.FindElement(By.Id("r1"));
        var e2 = Driver.FindElement(By.Id("r2"));
 
        IsNotSelected(e1);
        IsSelected(e2);
 
        e1.Click();
        IsSelected(e1);
 
        e2.Click();
        IsNotSelected(e1);
    }
 
    protected void IsSelected(IWebElement element)
    {
        Assert.True(element.IsSelected());
    }
 
    protected void IsNotSelected(IWebElement element)
    {
        Assert.False(element.IsSelected());
    }
 
    [Fact]
    public void CheckboxTests()
    {
        var e1 = Driver.FindElement(By.Id("c1"));
        var e2 = Driver.FindElement(By.Id("c2"));
 
        IsNotChecked(e1);
        IsChecked(e2);
 
        e1.Click();
        IsChecked(e1);
 
        e1.Click();
        IsNotChecked(e1);
    }
 
    protected void IsChecked(IWebElement element)
    {
        Assert.True(element.IsChecked());
    }
 
    protected void IsNotChecked(IWebElement element)
    {
        Assert.False(element.IsChecked());
    }
 
    [Fact]
    public void OptionTests()
    {
        var e1 = Driver.FindElement(By.Id("s1"));
 
        var option1 = e1.GetOptionByValue("a");
        var option2 = e1.GetOptionByValue("b");
 
        IsNotSelected(option1);
        IsSelected(option2);
 
        option1.Click();
 
        IsSelected(option1);
        IsNotSelected(option2);
    }
 
    [Fact]
    public void ToggleCheckedTests()
    {
        var e1 = Driver.FindElement(By.Id("c1"));
        IsNotChecked(e1);
 
        e1.SetChecked();
        IsChecked(e1);
 
        e1.SetChecked();
        IsChecked(e1);
 
        e1.SetUnchecked();
        IsNotChecked(e1);
 
        e1.SetUnchecked();
        IsNotChecked(e1);
    }
}

TestPage.htm

<html> <body> <p> <select id="s1"> <option value="a">Ant</option> <option value="b" selected="selected">Bird</option> </select> </p> <p> <input id="r1" type="radio" name="r" value="c" />Cat<br> <input id="r2" type="radio" name="r" value="d" checked="checked" />Dog </p> <p> <input id="c1" type="checkbox" name="vehicle" value="e" />Elephant<br> <input id="c2" type="checkbox" name="vehicle" value="f" checked="checked" />Fox </p> </body> </html>
Shout it

Enjoy,
Tom

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