public async Task TestCalculationWithDependenciesThrowsError()
{
var mockDep = Substitute.For <IDependency>();
mockDep.When(x => x.AsyncExternalCall(Arg.Any <int>())).Do(y => { throw new System.Exception("no network"); });
var sut = new NonDeterministic(mockDep);
var result = await sut.CalculationWithDependencies(2, 8);
}
public async Task TestCalculationWithDependencies()
{
var mockDep = Substitute.For <IDependency>();
mockDep.AsyncExternalCall(Arg.Any <int>()).Returns(Task.FromResult(4));
var sut = new NonDeterministic(mockDep);
var result = await sut.CalculationWithDependencies(2, 8);
await mockDep.Received().AsyncExternalCall(2);
Assert.AreEqual <int>(12, result);
}