public async Task TestThat_CalculateDistanceToDestination_When_SourceAndDestinationAreNotNull_Returns_NotNullDistance()
{
// Arrange
var distanceCalculator = new CartesianDistanceCalculator();
// Act
var distance = await distanceCalculator.CalculateDistanceToDestination(MockObjects.UserLocation1, MockObjects.ShopLocation1);
// Assert
Assert.NotNull(distance);
}
public async Task TestThat_CalculateDistanceToDestination_When_DestinationIsNull_Throws_ArgumentNullException()
{
// Arrange
var distanceCalculator = new CartesianDistanceCalculator();
// Act
async Task Act() => await distanceCalculator.CalculateDistanceToDestination(MockObjects.UserLocation1, MockObjects.NullShopLocation);
// Assert
await Assert.ThrowsAsync <ArgumentNullException>(Act);
}
public async Task TestThat_CalculateDistanceToDestination_When_SourceAndDestinationAreNotNull_Returns_DistanceWithSameTagAsDestination()
{
// Arrange
var distanceCalculator = new CartesianDistanceCalculator();
var source = MockObjects.UserLocation1;
var destination = MockObjects.ShopLocation1;
// Act
var distance = await distanceCalculator.CalculateDistanceToDestination(source, destination);
// Assert
Assert.Equal(destination.Tag, distance.Tag);
}
public async Task TestThat_CalculateDistanceToDestination_When_SourceAndDestinationAreNotNull_Returns_DistanceWithCartesianDistanceValue()
{
// Arrange
var distanceCalculator = new CartesianDistanceCalculator();
var source = MockObjects.UserLocation1;
var destination = MockObjects.ShopLocation1;
// Act
var distance = await distanceCalculator.CalculateDistanceToDestination(source, destination);
// Assert
Assert.Equal(GetCartesianDistance(source.X, source.Y, destination.X, destination.Y), distance.Value);
}