/// <summary>
/// Allows setting a fall-back URI if the underlying CSS URI for this resource fails to load (for example, if a CDN is down).
/// </summary>
/// <param name="resourceFallbackPath"></param>
/// <param name="testClass"></param>
/// <param name="testProperty"></param>
/// <param name="testPropertyValue"></param>
/// <returns></returns>
public ResourceInfo SetCSSFallback(string resourceFallbackPath, string testClass, string testProperty = null, string testPropertyValue = null)
{
if (Type != ResourceTypes.CSS)
{
throw new InvalidOperationException("You can only set a CSS fall-back URI on CSS resource."
+ System.Environment.NewLine + " Current Path: " + Path + " (" + Type.GetName() + ")"
+ System.Environment.NewLine + " Fall-back Path: " + resourceFallbackPath);
}
if (string.IsNullOrWhiteSpace(testClass) || string.IsNullOrWhiteSpace(testProperty) || string.IsNullOrWhiteSpace(testPropertyValue))
{
throw new InvalidOperationException("A test CSS class name, property name, and expected property value is required in order to complete a valid test.");
}
FallbackPath = string.IsNullOrWhiteSpace(resourceFallbackPath) ? null : resourceFallbackPath; // (must not be null or empty when setting this, otherwise null cancels it)
FallbackTestClass = testClass;
FallbackTestProperty = testProperty;
FallbackTestPropertyValue = testPropertyValue;
return(this);
}