public async Task Can_Get_AvailableDestinationSystems()
{
//Arrange
var prefix = CreateName();
var source = await ItSystemHelper.CreateItSystemInOrganizationAsync(CreateName(), OrganizationId, AccessModifier.Public);
var target1 = await ItSystemHelper.CreateItSystemInOrganizationAsync(prefix + 1, OrganizationId, AccessModifier.Public);
var target2 = await ItSystemHelper.CreateItSystemInOrganizationAsync(prefix + 2, OrganizationId, AccessModifier.Public);
var ignoredSystem = await ItSystemHelper.CreateItSystemInOrganizationAsync(CreateName(), OrganizationId, AccessModifier.Public);
var sourceUsage = await ItSystemHelper.TakeIntoUseAsync(source.Id, OrganizationId);
var targetUsage1 = await ItSystemHelper.TakeIntoUseAsync(target1.Id, OrganizationId);
var targetUsage2 = await ItSystemHelper.TakeIntoUseAsync(target2.Id, OrganizationId);
await ItSystemHelper.TakeIntoUseAsync(ignoredSystem.Id, OrganizationId);
//Act
var availableDestinationSystems = (await SystemRelationHelper.GetAvailableDestinationSystemsAsync(sourceUsage.Id, prefix))?.ToList();
//Assert
Assert.NotNull(availableDestinationSystems);
Assert.Equal(2, availableDestinationSystems.Count);
Assert.True(new[] { targetUsage1.Id, targetUsage2.Id }.SequenceEqual(availableDestinationSystems.Select(x => x.Id)));
}