/// <summary>
/// Construct an ExactCountConstraint on top of an existing constraint
/// </summary>
/// <param name="expectedCount"></param>
/// <param name="itemConstraint"></param>
public ExactCountConstraint(int expectedCount, IConstraint itemConstraint)
: base(itemConstraint)
{
Guard.ArgumentNotNull(itemConstraint, nameof(itemConstraint));
_itemConstraint = itemConstraint.Resolve();
_expectedCount = expectedCount;
}
/// <inheritdoc cref="Assert.That{T}(T,IResolveConstraint,string,object[])"/>
/// <remarks> Delegating to a different name to emphasize that behavior of other Ensure overloads may differ in behavior to Assert.That, and to reduce the number of completion options Intellisense pops up with.</remarks>
public static void Ensure <T>(T actual, IConstraint constraint, string message = null, params object[] args)
{
constraint = constraint.Resolve();
TestExecutionContext.CurrentContext.IncrementAssertCount();
var result = constraint.ApplyTo(actual);
if (!result.IsSuccess)
{
MessageWriter writer = new TextMessageWriter(message, args);
result.WriteMessageTo(writer);
// If an exception was thrown its stack trace should be displayed, not the stack trace of this assertion exception.
throw new AssertionExceptionWithTrimmedStackTrace(writer.ToString(), (result.ActualValue as Exception)?.StackTrace);
}
}