public void Service__ShouldAskForBlikCodeWithCredentials(string username)
{
// ARRANGE
var lowerBound = 100000;
var upperBound = 1000000;
var expectedBlikCode = new Random().Next(lowerBound, upperBound);
var userDto = new UserDto(username, string.Empty);
var mockApiService = new Mock <IBlikApiService>();
mockApiService.Setup(s => s.GetBlikCode(userDto))
.ReturnsAsync(expectedBlikCode);
mockApiService.Setup(s => s.GetBlikCode(null))
.Throws(new ArgumentNullException());
var service = new BlikService(mockApiService.Object);
// ACT
var actualBlikCode = Should.NotThrow(service.GetBlikCodeAsync(userDto));
// ASSERT
mockApiService.Verify(s => s.GetBlikCode(It.IsAny <UserDto>()), Times.Once);
actualBlikCode.ShouldBeInRange(lowerBound, upperBound);
expectedBlikCode.ShouldBe(actualBlikCode);
}
public async void Service__ShouldFailWithInvalidCredentials(string username)
{
// ARRANGE
var userDto = new UserDto(username, string.Empty);
var mockApiService = new Mock <IBlikApiService>();
mockApiService.Setup(s => s.GetBlikCode(userDto))
.Throws <ArgumentException>();
var service = new BlikService(mockApiService.Object);
// ACT
await Should.ThrowAsync <ArgumentException>(service.GetBlikCodeAsync(userDto));
// ASSERT
mockApiService.Verify(s => s.GetBlikCode(It.IsAny <UserDto>()), Times.Once);
}