/// <summary>
/// Returns diagnostic messages written to test context and clears from this instance.
/// </summary>
/// <param name="testContext">The test context instance.</param>
/// <returns>The diagnostic messages.</returns>
internal static string GetAndClearDiagnosticMessages(this ITestContext testContext)
{
var messages = testContext.GetDiagnosticMessages();
testContext.ClearDiagnosticMessages();
return(messages);
}