public void WhenCreatingAViewModelForAQuestionWithNullResponse_ThenInitializesTheResponseToAnEmptyCollection()
{
var question = new MultipleSelectionQuestion { Range = new[] { "a", "b", "c" } };
var viewModel = new MultipleSelectionQuestionViewModel(question);
CollectionAssert.AreEqual(new string[0], question.Response.ToArray());
}
public void WhenUpdatingTheElementsInTheSelectionsListInTheViewModel_ThenResponseIsSetInTheModelAndValidationIsUpdated()
{
var template = new MultipleSelectionQuestionTemplate { Range = new[] { "a", "b", "c" }, MaxSelections = 2 };
var question = template.CreateNewQuestion() as MultipleSelectionQuestion;
var questionAsINDEI = question as INotifyDataErrorInfo;
var viewModel = new MultipleSelectionQuestionViewModel(question);
viewModel.Selections.Add("a");
CollectionAssert.AreEqual((ICollection)viewModel.Selections, question.Response.ToArray());
Assert.IsFalse(questionAsINDEI.HasErrors);
viewModel.Selections.Add("b");
CollectionAssert.AreEqual((ICollection)viewModel.Selections, question.Response.ToArray());
Assert.IsFalse(questionAsINDEI.HasErrors);
viewModel.Selections.Add("c");
CollectionAssert.AreEqual((ICollection)viewModel.Selections, question.Response.ToArray());
Assert.IsTrue(questionAsINDEI.HasErrors);
viewModel.Selections.Remove("a");
CollectionAssert.AreEqual((ICollection)viewModel.Selections, question.Response.ToArray());
Assert.IsFalse(questionAsINDEI.HasErrors);
}
public void WhenSettingASelectionOnTheViewModel_ThenHasChangesIsTrue()
{
var question = new MultipleSelectionQuestion {
Range = new[] { "a", "b", "c" }, MaxSelections = 2
};
var viewModel = new MultipleSelectionQuestionViewModel(question);
int responseChanges = 0;
viewModel.ResponseChanged += (s, e) => responseChanges++;
viewModel.Selections.Add("a");
Assert.IsTrue(responseChanges > 0);
}
public void WhenSettingASelectionOnTheViewModel_ThenHasChangesIsTrue()
{
var template = new MultipleSelectionQuestionTemplate {
Range = new[] { "a", "b", "c" }, MaxSelections = 2
};
var question = template.CreateNewQuestion() as MultipleSelectionQuestion;
var viewModel = new MultipleSelectionQuestionViewModel(question);
int responseChanges = 0;
viewModel.ResponseChanged += (s, e) => responseChanges++;
viewModel.Selections.Add("a");
Assert.IsTrue(viewModel.HasChanges);
}
public void WhenUpdatingTheCollectionInitializedByTheViewModel_ThenTheViewModelNotifiesChangesToTheResponse()
{
var question = new MultipleSelectionQuestion { Range = new[] { "a", "b", "c" }, MaxSelections = 2 };
var viewModel = new MultipleSelectionQuestionViewModel(question);
int responseChanges = 0;
viewModel.ResponseChanged += (s, e) => responseChanges++;
viewModel.Selections.Add("a");
Assert.AreEqual(1, responseChanges);
viewModel.Selections.Add("b");
Assert.AreEqual(2, responseChanges);
viewModel.Selections.Add("c");
Assert.AreEqual(3, responseChanges);
viewModel.Selections.Remove("b");
Assert.AreEqual(4, responseChanges);
}
public void WhenSettingASelectionOnTheViewModel_ThenHasChangesIsTrue()
{
var template = new MultipleSelectionQuestionTemplate { Range = new[] { "a", "b", "c" }, MaxSelections = 2 };
var question = template.CreateNewQuestion() as MultipleSelectionQuestion;
var viewModel = new MultipleSelectionQuestionViewModel(question);
int responseChanges = 0;
viewModel.ResponseChanged += (s, e) => responseChanges++;
viewModel.Selections.Add("a");
Assert.IsTrue(viewModel.HasChanges);
}
public void WhenCreatingTheViewModel_ThenHasChangesIsFalse()
{
var template = new MultipleSelectionQuestionTemplate { Range = new[] { "a", "b", "c" }, MaxSelections = 2 };
var question = template.CreateNewQuestion() as MultipleSelectionQuestion;
var viewModel = new MultipleSelectionQuestionViewModel(question);
Assert.IsFalse(viewModel.HasChanges);
}
public void WhenSettingASelectionOnTheViewModel_ThenHasChangesIsTrue()
{
var question = new MultipleSelectionQuestion { Range = new[] { "a", "b", "c" }, MaxSelections = 2 };
var viewModel = new MultipleSelectionQuestionViewModel(question);
int responseChanges = 0;
viewModel.ResponseChanged += (s, e) => responseChanges++;
viewModel.Selections.Add("a");
Assert.IsTrue(responseChanges > 0);
}
public void WhenCreatingTheViewModel_ThenHasChangesIsFalse()
{
var question = new MultipleSelectionQuestion { Range = new[] { "a", "b", "c" }, MaxSelections = 2 };
var viewModel = new MultipleSelectionQuestionViewModel(question);
bool hasChanges = false;
viewModel.ResponseChanged += (o, e) => { hasChanges = true; };
Assert.IsFalse(hasChanges);
}