public void when_take_or_null_stored_thing_it_should_be_found()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
sut.Put(nameOfThing, thingItself);
sut.TakeOrNull <string>(nameOfThing).Should().BeSameAs(thingItself, "the thing lies in the pocket");
}
public void when_take_or_null_missing_thing_in_pocket_it_find_nothing()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
sut.Put(nameOfThing, thingItself);
sut.TakeOrNull <string>("some other name").Should().BeNull("there is no thing with such name in the pocket");
}
public void when_take_or_null_stored_thing_with_unexpected_type_it_should_throw()
{
var pocket = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
pocket.Put(nameOfThing, thingItself);
Action sut = () => pocket.TakeOrNull <given_pocket_extensions>(nameOfThing);
sut.Should().Throw <InvalidCastException>("impossible to cast a string to the different type");
}
public void when_take_or_null_thing_with_invalid_name_given_it_should_throw()
{
var pocket = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
pocket.Put(nameOfThing, thingItself);
Action sut = () => pocket.TakeOrNull <string>(name: null);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName == "name",
"null is not a valid name");
sut = () => pocket.TakeOrNull <string>(string.Empty);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName == "name",
"an empty string is not a valid name");
sut = () => pocket.TakeOrNull <string>(WhiteSpaceString);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName == "name",
"a whitespace is not a valid name");
}
public void when_take_or_null_something_from_empty_pocket_it_should_find_nothing()
{
var sut = new ConcurrentPocket();
sut.TakeOrNull <string>("some name").Should().BeNull("the pocket is empty");
}