[TestMethod]
public void WhenModelChildIsChanged_PropertiesAreUpdated()
{
// Arrange.
var screenMock = Mock.Create<IFieldSecurityManager>();
var field = new FieldEditMock();
var processMock = Mock.Create<ProcessEdit>();
var steps = new List<IStepEdit>();
var stepMock = Mock.Create<IStepEdit>();
Mock.Arrange(() => stepMock.IsChild).Returns(true);
steps.Add(stepMock);
stepMock = Mock.Create<IStepEdit>();
Mock.Arrange(() => stepMock.IsChild).Returns(true);
steps.Add(stepMock);
stepMock = Mock.Create<IStepEdit>();
Mock.Arrange(() => stepMock.IsChild).Returns(true);
steps.Add(stepMock);
field.StepList.AddRange(steps);
var vm = new ExpandableStepPropBag(processMock) { FieldSecurityManager = screenMock, Model = field };
field.RaiseChildChanged();
foreach (var mock in steps)
{
Mock.Assert(() => mock.UpdateProps(vm), Occurs.Once());
}
