public void IntegrationTest()
{
var unsortedPeople = new List<Person>
{
new Person("BFirst", "BLast"),
new Person("AFirst", "ALast")
};
var sortedPeople = new List<Person>
{
new Person("AFirst", "ALast"),
new Person("BFirst", "BLast")
};
// Arrange
var dataSource = Substitute.For<IPersonDataSource>();
dataSource.GetPeople().Returns(unsortedPeople);
var sortStrategy = Substitute.For<ISortStrategy>();
sortStrategy.Sort(unsortedPeople).Returns(sortedPeople);
var displayer = Substitute.For<IPeopleDisplayer>();
displayer.DisplayPeople(sortedPeople).Returns(true);
// Act
var execution = new SortNamesExecution(dataSource, sortStrategy, new IPeopleDisplayer[] { displayer });
bool result = execution.Run();
// Assert
Assert.IsTrue(result);
dataSource.Received().GetPeople();
sortStrategy.Received().Sort(unsortedPeople);
displayer.Received().DisplayPeople(sortedPeople);
}
public void GivenMultipleDisplayers_ThenAllDisplayersAreTriggered()
{
var sortedPeople = new List<Person>
{
new Person("AFirst", "ALast"),
new Person("BFirst", "BLast")
};
// Arrange
var dataSource = Substitute.For<IPersonDataSource>();
var sortStrategy = Substitute.For<ISortStrategy>();
sortStrategy.Sort(Arg.Any<IEnumerable<Person>>()).Returns(sortedPeople);
var displayer1 = Substitute.For<IPeopleDisplayer>();
displayer1.DisplayPeople(Arg.Any<IEnumerable<Person>>()).Returns(true);
var displayer2 = Substitute.For<IPeopleDisplayer>();
displayer2.DisplayPeople(Arg.Any<IEnumerable<Person>>()).Returns(true);
// Act
var execution = new SortNamesExecution(dataSource, sortStrategy, new IPeopleDisplayer[] { displayer1, displayer2 });
var result = execution.Run();
// Assert
Assert.IsTrue(result);
displayer1.Received().DisplayPeople(sortedPeople);
displayer2.Received().DisplayPeople(sortedPeople);
}
public void WhenDataSourceFails_ThenExecutionFails()
{
// Arrange
var dataSource = Substitute.For<IPersonDataSource>();
dataSource.GetPeople().Returns((IEnumerable<Person>)null);
var sortStrategy = Substitute.For<ISortStrategy>();
var displayer = Substitute.For<IPeopleDisplayer>();
// Act
var execution = new SortNamesExecution(dataSource, sortStrategy, new IPeopleDisplayer[] { displayer });
var result = execution.Run();
// Assert
sortStrategy.DidNotReceiveWithAnyArgs().Sort(null);
displayer.DidNotReceiveWithAnyArgs().DisplayPeople(null);
Assert.IsFalse(result);
}
