private VariationTestItem InvokeMatrixCombinationCallback(MethodInfo method, VariationTestItem variation, VariationAttribute attribute)
{
var callbackAttr = (TestMatrixCombinationCallbackAttribute)method.GetCustomAttributes(typeof(TestMatrixCombinationCallbackAttribute), false).SingleOrDefault();
if (callbackAttr != null)
{
var callbackMethod = this.GetType().GetMethod(callbackAttr.CallbackMethodName, true, false);
ExceptionUtilities.CheckObjectNotNull(callbackMethod, "Could not find instance method '{0}' on type '{1}'", callbackAttr.CallbackMethodName, this.GetType());
ExceptionUtilities.Assert(typeof(VariationTestItem).IsAssignableFrom(callbackMethod.ReturnType), "Matrix combination callback '{0}' returns unexpected type '{1}'", callbackMethod.Name, callbackMethod.ReturnType);
var arguments = new object[attribute.Parameters.Length + 1];
arguments[0] = variation;
Array.Copy(attribute.Parameters, 0, arguments, 1, attribute.Parameters.Length);
variation = (VariationTestItem)callbackMethod.Invoke(this, arguments);
}
return(variation);
}
private void GenerateVariations(List <TestItem> result)
{
// add methods with [Variation] or [TestMatrix]
foreach (MethodInfo mi in this.GetType().GetMethods())
{
// get any [___Bug] attributes
var allBugs = ((BugAttribute[])mi.GetCustomAttributes(typeof(BugAttribute), false)).Union(this.bugs).ToList();
// get any [Variation] attributes
var variationAttributes = mi.GetCustomAttributes(typeof(VariationAttribute), false).Cast <VariationAttribute>().ToList();
// get the [TestMatrix] if it exists
var matrixAttribute = (TestMatrixAttribute)mi.GetCustomAttributes(typeof(TestMatrixAttribute), false).SingleOrDefault();
if (matrixAttribute != null)
{
var dimensionAttributes = mi.GetCustomAttributes(typeof(TestMatrixDimensionAttribute), false).Cast <TestMatrixDimensionAttribute>();
var constraintsInfo = this.GetConstraintsInfo(mi);
variationAttributes.AddRange(this.GenerateTestAttributesFromMatrix <VariationAttribute>(matrixAttribute, dimensionAttributes, constraintsInfo));
}
foreach (VariationAttribute varAttr in variationAttributes)
{
VariationTestItem variation = new VariationTestItem(this, mi, varAttr);
variation.SetTestItemFilter(this.GetTestItemFilter());
foreach (BugAttribute attr in allBugs)
{
variation.Bugs.Add(attr);
}
if (matrixAttribute != null)
{
variation = this.InvokeMatrixCombinationCallback(mi, variation, varAttr);
this.AssertTestItemIsNotSkippedWhenExplorationIsNotExhaustive(variation, matrixAttribute);
}
if (variation != null)
{
result.Add(variation);
}
}
}
}