public async Task Should_Get_List()
{
// Arrange
Venue venue = VenueSeedData.WeiherhofSchule;
Microsoft.EntityFrameworkCore.DbSet <Venue> mockVenues = MockDbSets.Venues;
mockVenues.FindAsync(Arg.Any <Guid>()).Returns(venue);
_arpaContext.Venues.Returns(mockVenues);
// Act
IImmutableList <Room> result = await _handler.Handle(
new Rooms.Query(venue.Id),
new CancellationToken());
// Assert
result.Should().BeEquivalentTo(venue.Rooms);
}