public void when_try_to_remove_thing_with_invalid_name_given_it_should_throw()
{
var pocket = new ConcurrentPocket();
Action sut = () => pocket.TryRemove(name: null);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("name"),
"null is not a valid name");
sut = () => pocket.TryRemove(string.Empty);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("name"),
"an empty string is not a valid name");
sut = () => pocket.TryRemove(WhiteSpaceString);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("name"),
"a whitespace is not a valid name");
}
public void when_try_to_remove_stored_thing_it_should_remove_it_and_return_success_status()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
sut.Put(nameOfThing, thingItself);
sut.TryRemove(nameOfThing).Should().BeTrue("thing was removed from the pocket");
sut.GetThings().Count.Should().Be(expected: 0, "the pocket is empty");
}
public void when_try_to_remove_thing_not_stored_in_pocket_it_should_leave_pocket_content_unchanged_and_return_fail_status()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
sut.Put(nameOfThing, thingItself);
sut.TryRemove("a different name").Should().BeFalse("a thing with such name not stored in the pocket");
sut.GetThings().Count.Should().Be(expected: 1, "number of things should be the same");
sut.GetThings()[nameOfThing].Should().BeSameAs(thingItself, "the pocket content should stay the same");
}
