/// <summary>
/// Gets a mechanism to find elements by their CSS class.
/// </summary>
/// <param name="classNameToFind">The CSS class to find.</param>
/// <returns>A <see cref="By"/> object the driver can use to find the elements.</returns>
/// <remarks>If an element has many classes then this will match against each of them.
/// For example if the value is "one two onone", then the following values for the
/// className parameter will match: "one" and "two".</remarks>
public static By ClassName(string classNameToFind)
{
if (classNameToFind == null)
{
throw new ArgumentNullException("classNameToFind", "Cannot find elements when the class name expression is null.");
}
By by = new By();
by.description = "By.ClassName[Contains]: " + classNameToFind;
by.mechanism = "css selector";
by.criteria = "." + By.EscapeCssSelector(classNameToFind);
if (by.criteria.Contains(" "))
{
// Finding elements by class name with whitespace is not allowed.
// However, converting the single class name to a valid CSS selector
// by prepending a '.' may result in a still-valid, but incorrect
// selector. Thus, we short-ciruit that behavior here.
throw new InvalidSelectorException("Compound class names not allowed. Cannot have whitespace in class name. Use CSS selectors instead.");
}
by.findElementMethod = (ISearchContext context) => ((IFindsElement)context).FindElement(by.mechanism, by.criteria);
by.findElementsMethod = (ISearchContext context) => ((IFindsElement)context).FindElements(by.mechanism, by.criteria);
return(by);
}
/// <summary>
/// Gets a mechanism to find elements by their ID.
/// </summary>
/// <param name="idToFind">The ID to find.</param>
/// <returns>A <see cref="By"/> object the driver can use to find the elements.</returns>
public static By Id(string idToFind)
{
if (idToFind == null)
{
throw new ArgumentNullException("idToFind", "Cannot find elements with a null id attribute.");
}
By by = new By();
by.description = "By.Id: " + idToFind;
by.mechanism = "css selector";
string selector = By.EscapeCssSelector(idToFind);
by.criteria = "#" + selector;
by.findElementMethod = (ISearchContext context) => ((IFindsElement)context).FindElement(by.mechanism, by.criteria);
if (string.IsNullOrEmpty(selector))
{
// Finding multiple elements with an empty ID will return
// an empty list. However, finding by a CSS selector of '#'
// throws an exception, even in the multiple elements case,
// which means we need to short-circuit that behavior.
by.findElementsMethod = (ISearchContext context) => new List <IWebElement>().AsReadOnly();
}
else
{
by.findElementsMethod = (ISearchContext context) => ((IFindsElement)context).FindElements(by.mechanism, by.criteria);
}
return(by);
}
/// <summary>
/// Gets a mechanism to find elements by their name.
/// </summary>
/// <param name="nameToFind">The name to find.</param>
/// <returns>A <see cref="By"/> object the driver can use to find the elements.</returns>
public static By Name(string nameToFind)
{
if (nameToFind == null)
{
throw new ArgumentNullException("nameToFind", "Cannot find elements when name text is null.");
}
string selector = "*[name =\"" + By.EscapeCssSelector(nameToFind) + "\"]";
By by = new By(CssSelectorMechanism, selector);
by.description = "By.Name: " + nameToFind;
return(by);
}
/// <summary>
/// Gets a mechanism to find elements by their name.
/// </summary>
/// <param name="nameToFind">The name to find.</param>
/// <returns>A <see cref="By"/> object the driver can use to find the elements.</returns>
public static By Name(string nameToFind)
{
if (nameToFind == null)
{
throw new ArgumentNullException("nameToFind", "Cannot find elements when name text is null.");
}
By by = new By();
by.description = "By.Name: " + nameToFind;
by.mechanism = "css selector";
by.criteria = "*[name =\"" + By.EscapeCssSelector(nameToFind) + "\"]";
by.findElementMethod = (ISearchContext context) => ((IFindsElement)context).FindElement(by.mechanism, by.criteria);
by.findElementsMethod = (ISearchContext context) => ((IFindsElement)context).FindElements(by.mechanism, by.criteria);
return(by);
}
/// <summary>
/// Gets a mechanism to find elements by their CSS class.
/// </summary>
/// <param name="classNameToFind">The CSS class to find.</param>
/// <returns>A <see cref="By"/> object the driver can use to find the elements.</returns>
/// <remarks>If an element has many classes then this will match against each of them.
/// For example if the value is "one two onone", then the following values for the
/// className parameter will match: "one" and "two".</remarks>
public static By ClassName(string classNameToFind)
{
if (classNameToFind == null)
{
throw new ArgumentNullException(nameof(classNameToFind), "Cannot find elements when the class name expression is null.");
}
string selector = "." + By.EscapeCssSelector(classNameToFind);
if (selector.Contains(" "))
{
// Finding elements by class name with whitespace is not allowed.
// However, converting the single class name to a valid CSS selector
// by prepending a '.' may result in a still-valid, but incorrect
// selector. Thus, we short-ciruit that behavior here.
throw new InvalidSelectorException("Compound class names not allowed. Cannot have whitespace in class name. Use CSS selectors instead.");
}
By by = new By(CssSelectorMechanism, selector);
by.description = "By.ClassName[Contains]: " + classNameToFind;
return(by);
}
