public void ExtractParameterFromDictionaryThrowsIfParameterIsMissing()
{
// Arrange
Dictionary <string, object> parameters = new Dictionary <string, object>();
// Act & assert
ExceptionHelper.ExpectArgumentException(
delegate {
AsyncActionDescriptor.ExtractParameterFromDictionary(_integerParameter, parameters, _convertIntToStringMethod);
}, @"The parameters dictionary does not contain an entry for parameter 'value' of type 'System.Int32' for method 'System.String ToString(Int32)' in 'System.Convert'. The dictionary must contain an entry for each parameter, even parameters with null values.
Parameter name: parameters");
}
public void ExtractParameterFromDictionaryReturnsNullIfParameterIsNullAndNullableType()
{
// Arrange
Dictionary <string, object> parameters = new Dictionary <string, object>()
{
{ "value", null }
};
// Act
object returned = AsyncActionDescriptor.ExtractParameterFromDictionary(_stringParameter, parameters, _convertStringToIntMethod);
// Assert
Assert.IsNull(returned);
}
public void ExtractParameterFromDictionaryReturnsParameterIfValid()
{
// Arrange
Dictionary <string, object> parameters = new Dictionary <string, object>()
{
{ "value", 42 }
};
// Act
object returned = AsyncActionDescriptor.ExtractParameterFromDictionary(_integerParameter, parameters, _convertIntToStringMethod);
// Assert
Assert.AreEqual(42, returned);
}
public void ExtractParameterFromDictionaryThrowsIfParameterIsWrongType()
{
// Arrange
Dictionary <string, object> parameters = new Dictionary <string, object>()
{
{ "value", 42 }
};
// Act & assert
ExceptionHelper.ExpectArgumentException(
delegate {
AsyncActionDescriptor.ExtractParameterFromDictionary(_stringParameter, parameters, _convertStringToIntMethod);
}, @"The parameters dictionary contains an invalid entry for parameter 'value' for method 'Int32 ToInt32(System.String)' in 'System.Convert'. The dictionary contains a value of type 'System.Int32', but the parameter requires a value of type 'System.String'.
Parameter name: parameters");
}
public void ExtractParameterFromDictionaryThrowsIfRequiredParameterIsNull()
{
// Arrange
Dictionary <string, object> parameters = new Dictionary <string, object>()
{
{ "value", null }
};
// Act & assert
ExceptionHelper.ExpectArgumentException(
delegate {
AsyncActionDescriptor.ExtractParameterFromDictionary(_integerParameter, parameters, _convertIntToStringMethod);
}, @"The parameters dictionary contains a null entry for parameter 'value' of non-nullable type 'System.Int32' for method 'System.String ToString(Int32)' in 'System.Convert'. To make a parameter optional its type should be either a reference type or a Nullable type.
Parameter name: parameters");
}
