public void If_a_circular_dependency_was_detected_it_should_raise_a_exception()
{
var tasks = new[]
{
new RegisteredTask(typeof (ExampleTask1)) {DependsOn = new[] {nameof(ExampleTask2)}},
new RegisteredTask(typeof (ExampleTask2)) {DependsOn = new[] {nameof(ExampleTask3)}},
new RegisteredTask(typeof (ExampleTask3)) {DependsOn = new[] {nameof(ExampleTask4)}},
new RegisteredTask(typeof (ExampleTask4)) {DependsOn = new[] {nameof(ExampleTask1)}}
};
var registration = A.Fake<ITaskRegistration>();
A.CallTo(() => registration.Tasks).Returns(tasks);
var resolver = new TaskGraphResolver(registration);
var taskToResolve = tasks[0];
Assert.Throws<CircularTaskDependencyDetectedException>(() => resolver.Resolve(taskToResolve));
}
public void It_should_resolve_the_dependency_graph()
{
var tasks = new[]
{
new RegisteredTask(typeof (ExampleTask1)) { DependsOn = new[] {nameof(ExampleTask2), nameof(ExampleTask3)} },
new RegisteredTask(typeof (ExampleTask2)) {DependsOn = new[] {nameof(ExampleTask4)}},
new RegisteredTask(typeof (ExampleTask3)) {DependsOn = new[] {nameof(ExampleTask4)}},
new RegisteredTask(typeof (ExampleTask4))
};
var registration = A.Fake<ITaskRegistration>();
A.CallTo(() => registration.Tasks).Returns(tasks);
var resolver = new TaskGraphResolver(registration);
var taskToResolve = tasks[0];
var result = resolver.Resolve(taskToResolve);
CollectionAssert.AreEqual(new[] {tasks[3], tasks[1], tasks[2], tasks[0]}, result);
}