public void when_take_or_throw_something_from_empty_pocket_it_should_throw()
{
var pocket = new ConcurrentPocket();
Action sut = () => pocket.TakeOrThrow <string>("some name");
sut.Should().Throw <KeyNotFoundException>("the pocket is empty");
}
public void when_put_nothing_with_valid_name_given_it_should_throw()
{
var pocket = new ConcurrentPocket();
Action sut = () => pocket.Put("a valid name", thing: null);
sut.Should().Throw <ArgumentNullException>().Where(exception => exception.ParamName.Equals("thing"));
}
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_put_reference_thing_with_accepted_name_it_should_be_found_in_the_pocket()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
var pocket = sut.Put(nameOfThing, thingItself);
pocket.Should().BeSameAs(sut, "returned pocket should stay the same");
pocket.GetThings()[nameOfThing].Should().BeSameAs(thingItself, "thing should be stored by reference");
}
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_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_take_stored_thing_by_name_and_its_parent_type_it_should_return_it_and_success_status()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
var thingItself = new Derived();
sut.Put(nameOfThing, thingItself);
sut.TryTake <Base>(nameOfThing, out var foundThing).Should().BeTrue("the requested thing lies in the pocket");
foundThing.Should().BeSameAs(thingItself, "thing should be stored by reference");
}
public void when_try_to_take_missing_reference_thing_it_should_return_null_and_fail_status()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
sut.Put(nameOfThing, thingItself);
sut.TryTake <string>("a different name", out var foundThing).Should().BeFalse("there is no a thing with this name in the pocket");
foundThing.Should().BeNull("null is expected 'nothing' for a reference type");
}
public void when_try_to_take_missing_struct_thing_it_should_return_default_value_and_fail_status()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
var thingItself = DateTime.Now;
sut.Put(nameOfThing, thingItself);
sut.TryTake <DateTime>("a different name", out var foundThing).Should().BeFalse("there is no a thing with this name in the pocket");
foundThing.Should().Be(new DateTime(), "default DateTime is expected 'nothing' for a struct DateTime");
}
public void when_take_or_throw_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.TakeOrThrow <given_pocket_extensions>(nameOfThing);
sut.Should().Throw <InvalidCastException>("impossible to cast a string to the different type");
}
public void when_take_or_throw_missing_thing_in_pocket_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.TakeOrThrow <string>("some other name");
sut.Should().Throw <KeyNotFoundException>("there is no thing with such name in the pocket");
}
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");
}
public void when_put_thing_with_same_name_as_already_present_it_should_replace_it()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
var secondThing = DateTime.Now;
sut.Put(nameOfThing, "first thing")
.Put(nameOfThing, secondThing);
sut.GetThings().Count.Should().Be(expected: 1, "same name means to replace the stored thing");
sut.GetThings()[nameOfThing].Should().Be(secondThing, "the thing should be replaced");
}
public void when_take_or_put_thing_with_invalid_factory_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.TakeOrPut <string>(nameOfThing, thingFactory: null);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName == "thingFactory",
"null is not a valid thing factory");
}
public void when_take_or_put_stored_thing_it_should_be_found()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
var isFactoryCalled = false;
Func <string> thingFactory = () =>
{
isFactoryCalled = true;
return(thingItself);
};
sut.Put(nameOfThing, thingItself);
sut.TakeOrPut(nameOfThing, thingFactory).Should().BeSameAs(thingItself, "the thing lies in the pocket");
isFactoryCalled.Should().BeFalse("the think was already stored in the pocket");
}
public void when_take_or_put_thing_from_empty_pocket_it_should_make_thing_put_it_into_pocket_and_return_it()
{
var sut = new ConcurrentPocket();
const string nameOfThing = "name of the thing";
const string thingItself = "the thing itself";
var isFactoryCalled = false;
Func <string> thingFactory = () =>
{
isFactoryCalled = true;
return(thingItself);
};
var thing = sut.TakeOrPut(nameOfThing, thingFactory);
sut.GetThings().Count.Should().Be(expected: 1, "the made thing should be stored in the pocket");
isFactoryCalled.Should().BeTrue("it was an empty pocket and the thing should be made from scratch");
thing.Should().BeSameAs(thingItself, "exactly this thing was made");
}
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_put_something_with_invalid_name_it_should_throw()
{
var pocket = new ConcurrentPocket();
Action sut = () => pocket.Put(name: null, "something");
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("name"),
"null is not a valid name");
sut = () => pocket.Put(string.Empty, "something");
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("name"),
"an empty string is not a valid name");
sut = () => pocket.Put(WhiteSpaceString, "something");
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName.Equals("name"),
"a whitespace string is not a valid name");
}
public void when_take_or_throw_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.TakeOrThrow <string>(name: null);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName == "name",
"null is not a valid name");
sut = () => pocket.TakeOrThrow <string>(string.Empty);
sut.Should().Throw <ArgumentNullException>().Where(
exception => exception.ParamName == "name",
"an empty string is not a valid name");
sut = () => pocket.TakeOrThrow <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");
}
public void when_try_get_things_from_empty_pocket_it_should_return_nothing()
{
var sut = new ConcurrentPocket();
sut.GetThings().Count.Should().Be(expected: 0, "no any thing in the pocket");
}