public void should_be_able_to_create_an_instance_of_an_object_with_sequential_values_generated_by_a_function()
{
var instance = new AnObject();
var state = new Dictionary<string, object>();
Expression<Func<AnObject, int>> expression = x => x.OddNumber;
var setter = new SequentialPropertySetter(expression.GetMemberExpression(), 1, previous => (int) previous + 2);
setter.ApplyValue(instance, state);
Assert.AreEqual(1, instance.OddNumber);
setter.ApplyValue(instance, state);
Assert.AreEqual(3, instance.OddNumber);
}
public void should_be_able_to_generate_successive_string_values_with_non_numeric_starting_value()
{
var instance = new AnObject();
var state = new Dictionary<string, object>();
Expression<Func<AnObject, string>> expression = x => x.SuccessiveString;
var setter = new SequentialPropertySetter(expression.GetMemberExpression(), "person", null);
setter.ApplyValue(instance, state);
Assert.AreEqual("person", instance.SuccessiveString);
setter.ApplyValue(instance, state);
Assert.AreEqual("person0", instance.SuccessiveString);
}
public void should_be_able_to_create_an_instance_of_an_object_with_sequential_values()
{
var instance = new AnObject();
var state = new Dictionary<string, object>();
Expression<Func<AnObject, int>> expression = x => x.Position;
var setter = new SequentialPropertySetter(expression.GetMemberExpression(), 0, null);
setter.ApplyValue(instance, state);
Assert.AreEqual(0, instance.Position);
setter.ApplyValue(instance, state);
Assert.AreEqual(1, instance.Position);
}
public void should_raise_an_error_if_the_generator_does_not_know_how_to_generate_sequential_values()
{
var instance = new AnObject();
var state = new Dictionary<string, object>();
var initialValue = new object();
Expression<Func<AnObject, object>> expression = x => x.UnsupportedSequentialValue;
var setter = new SequentialPropertySetter(expression.GetMemberExpression(), initialValue, null);
setter.ApplyValue(instance, state);
Assert.AreEqual(initialValue, instance.UnsupportedSequentialValue);
Assert.Throws<NotImplementedException>(() => setter.ApplyValue(instance, state));
}