public async Task IsMemberAsync()
{
// Arrange
var service = new ClanService(TestMock.ClanRepository.Object);
TestMock.ClanRepository.Setup(repository => repository.IsMemberAsync(It.IsAny <UserId>())).ReturnsAsync(true).Verifiable();
// Act
await service.IsMemberAsync(new UserId());
// Assert
TestMock.ClanRepository.Verify(repository => repository.IsMemberAsync(It.IsAny <UserId>()), Times.Once);
}
