/// <summary>
/// Creates a new test scenario
/// </summary>
/// <param name="totalUsers">The total number of simulated users that will be created during the test.</param>
/// <param name="targetAddress">The URL of the remote host to test. Must be a valid absolute URI.</param>
/// <param name="testDuration">The duration of the test, expressed in seconds. Must be between 30 and 300 seconds.</param>
/// <param name="pauseDuration">
/// The duration of the pause between each step, expressed in seconds. Must be between 0 and 10 seconds.
/// Defaults to 3 seconds.
/// </param>
/// <param name="userGrowthProgressionModel">
/// Describes the model that dictates how the number of concurrent users grows during the lifespan of the test.
/// Defaults to linear.
/// </param>
internal Scenario(int totalUsers, string targetAddress, int testDuration,
UserGrowthProgressionModel userGrowthProgressionModel, double timeout, int pauseDuration = 3)
{
bool throwsException = false;
StringBuilder errorMessageBuilder = new StringBuilder();
if (totalUsers < 1)
{
throwsException = true;
errorMessageBuilder.AppendLine("Total number of users must be greater than 0.");
}
else
{
this.Users = totalUsers;
}
if (!Uri.IsWellFormedUriString(targetAddress, UriKind.Absolute))
{
throwsException |= true;
errorMessageBuilder.AppendLine("The supplied target address is not valid.");
}
else
{
this.BaseAddress = new Uri(targetAddress);
}
if (testDuration < 30 || testDuration > 300)
{
throwsException |= true;
errorMessageBuilder.AppendLine("Allowed test length is between 30 and 300 seconds.");
}
else
{
this.Duration = testDuration;
}
if (timeout < 0)
{
throwsException |= true;
errorMessageBuilder.AppendLine("Time out must be greater than 0 milliseconds.");
}
else
{
this.Timeout = timeout;
}
if (pauseDuration < 0 || pauseDuration > 10)
{
throwsException |= true;
errorMessageBuilder.AppendLine("Allowed pause length is between 0 and 10 seconds.");
}
else
{
this.PauseDuration = pauseDuration;
}
if (throwsException)
{
throw new ArgumentException("Error(s): " + errorMessageBuilder.ToString());
}
this.UserGrowthProgressionModel = userGrowthProgressionModel;
this.Steps = new List<HttpRequestMessage>();
}
public Engine(int totalUsers, string targetAddress, int testDuration,
UserGrowthProgressionModel userGrowthProgressionModel, int pauseDuration, double timeout)
{
try
{
this.scenario = new Scenario(totalUsers, targetAddress, testDuration, userGrowthProgressionModel, timeout, pauseDuration);
this.Factory = this.scenario.CreateStep;
}
catch (ArgumentException exception)
{
// TODO Log it
throw;
}
// Init params
this.testTimeElapsed = new Stopwatch();
this.executionResults = new List<HttpActionResult>();
this.progressUpdateFrequency = 5000; // Send an update out to the client every x seconds
InitialiseTimers();
}
