/// <summary>
/// Validate that if a specified argument value is null, that a specified exception is thrown on an Async method
/// </summary>
/// <typeparam name="T">Type under test</typeparam>
/// <typeparam name="TException">Exception expected to be thrown</typeparam>
/// <param name="methodName">Method to be test</param>
/// <param name="parameterName">Method Parameter Name to verify</param>
/// <param name="parameterValue">Parameter Value (Default null)</param>
public static void ValidateExceptionIsThrownIfParameterIsNullAsync <T, TException>(string methodName, string parameterName, object parameterValue = null)
where TException : Exception
{
if (methodName == null)
{
throw new ArgumentNullException(nameof(methodName));
}
if (parameterName == null)
{
throw new ArgumentNullException(nameof(parameterName));
}
var methodInfo = GetMethodInformation <T>(methodName, parameterName);
var methodParameters = methodInfo.GetParameters();
var methodParameterValues = new List <object>();
foreach (var currentParameter in methodParameters)
{
if (!string.IsNullOrWhiteSpace(parameterName) && currentParameter.Name == parameterName)
{
methodParameterValues.Add(parameterValue);
continue;
}
methodParameterValues.Add(currentParameter.CreateRandomValue());
}
var constructedObject = ConstructorTestHelper.ConstructObject(typeof(T));
var argumentNullException = Assert.ThrowsAsync(typeof(TException),
() => (Task)methodInfo.Invoke(constructedObject, methodParameterValues.ToArray()),
$"{typeof(TException).Namespace} Exception not throw for Method [{methodName}] Parameter [{parameterName}] on {typeof(T).FullName}");
argumentNullException.Message.Should().Contain(parameterName);
}
/// <summary>
/// Validate when setting a property, the value is actually available via get
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="propertyName"></param>
public static void ValidateGetAndSet <T>(string propertyName)
where T : class
{
var objectUnderTest = ConstructorTestHelper.ConstructObject <T>();
if (objectUnderTest == null)
{
Assert.Fail($"Failed to create {typeof(T).FullName} to test Property Get and Set for {propertyName}");
}
objectUnderTest.ValidateGetAndSet(propertyName);
}
/// <summary>
/// Validate that if a specified argument value is null, that a ArgumentNullException is thrown
/// </summary>
/// <typeparam name="T">Type under test</typeparam>
/// <param name="methodName">Method to be test</param>
/// <param name="parameterName">Method Parameter Name to verify</param>
/// <param name="parameterValue">Parameter Value (Default null)</param>
public static void ValidateArgumentNullExceptionIfParameterIsNull <T>(string methodName, string parameterName, object parameterValue = null)
{
if (methodName == null)
{
throw new ArgumentNullException(nameof(methodName));
}
if (parameterName == null)
{
throw new ArgumentNullException(nameof(parameterName));
}
var methodInfo = GetMethodInformation <T>(methodName, parameterName);
var methodParameters = methodInfo.GetParameters();
var methodParameterValues = new List <object>();
foreach (var currentParameter in methodParameters)
{
if (!string.IsNullOrWhiteSpace(parameterName) && currentParameter.Name == parameterName)
{
methodParameterValues.Add(parameterValue);
continue;
}
methodParameterValues.Add(currentParameter.CreateRandomValue());
}
var constructedObject = ConstructorTestHelper.ConstructObject(typeof(T));
var invocationException = Assert.Throws <TargetInvocationException>(() => methodInfo.Invoke(constructedObject, methodParameterValues.ToArray()));
var argumentNullException = (invocationException.InnerException as ArgumentNullException);
if (argumentNullException == null)
{
Assert.Fail($"ArgumentNullException not throw for Method [{methodName}] Parameter [{parameterName}] on {typeof(T).FullName}");
}
argumentNullException.ParamName.Should().Be(parameterName);
}
