public async Task TestFilterAsync()
{
var serviceClient = ProductsServiceClient.Mock.Object;
// TODO Data could also retrieved and tested with the filter only partially filled.
var categoriesExpected = await serviceClient.GetProductCategoriesAsync();
const int categoryExpectedOrder = 2;
var categoryExpected = categoriesExpected[categoryExpectedOrder - 1];
// Note literals are used for the control names here as they are fields in the view classes.
var masterFilterComboBox = TestSession.FindElementByAccessibilityIdWait("MasterFilterComboBox");
Assert.IsNotNull(masterFilterComboBox);
// Necessary to actually get the elements created in the GUI.
masterFilterComboBox.Click();
// TODO Check length of list?
// Note that Click must be applied this way. Finding the element separately resulted in only a brief display on screen after which the Display property was false, which prevented Click.
// TODO This tends to fail currently.
masterFilterComboBox.FindElementByName(categoryExpected.Name).Click();
var subcategoriesExpected = await serviceClient.GetProductSubcategoriesAsync();
const int subcategoryExpectedOrder = 1;
var subcategoryExpected = subcategoriesExpected.FindAll(subcategory => subcategory.ProductCategoryId == categoryExpected.Id)[subcategoryExpectedOrder - 1];
var detailFilterComboBox = TestSession.FindElementByAccessibilityIdWait("DetailFilterComboBox");
Assert.IsNotNull(detailFilterComboBox);
detailFilterComboBox.Click();
detailFilterComboBox.FindElementByName(subcategoryExpected.Name).Click();
var searchString = $"{categoryExpected.Id}.{subcategoryExpected.Id}";
var productsOverviewExpected = await serviceClient.GetProductsOverviewByAsync(categoryExpected.Id, subcategoryExpected.Id, searchString);
// Note this is a UserControl.
var textFilterControl = TestSession.FindElementByAccessibilityIdWait("TextFilterTextBox");
Assert.IsNotNull(textFilterControl);
// The true text element within.
var textFilterTextBox = textFilterControl.FindElementByClassName("TextBox");
textFilterTextBox.Clear();
textFilterTextBox.SendKeys(searchString.Substring(0, 2));
// TODO Add enablement on the button depending on this control and test. Currently the control only colours on less than 3 characters.
textFilterTextBox.SendKeys(searchString.Substring(2, 1));
var filterButton = TestSession.FindElementByAccessibilityIdWait("FilterButton");
Assert.IsNotNull(filterButton);
filterButton.Click();
var itemsCountTextBlock = TestSession.FindElementByAccessibilityIdWait("ItemsCountTextBlock");
Assert.IsNotNull(itemsCountTextBlock);
Assert.AreEqual(itemsCountTextBlock.Text, productsOverviewExpected.Count.ToString());
}