added unit tests for TableViewColumnCollection

Author: w-ahmad

tests/TableViewColumnsCollectionTests.cs

@@ -0,0 +1,189 @@
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Microsoft.VisualStudio.TestTools.UnitTesting.AppContainer;
+using System;
+using System.Collections.Specialized;
+
+namespace WinUI.TableView.Tests;
+
+[TestClass]
+public class TableViewColumnsCollectionTests
+{
+    [UITestMethod]
+    public void Constructor_ShouldInitializeTableViewProperty()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        Assert.AreEqual(tableView, collection.TableView);
+    }
+
+    [UITestMethod]
+    public void Add_ShouldRaiseCollectionChangedEvent()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        var column = new TableViewTextColumn();
+
+        var eventRaised = false;
+        collection.CollectionChanged += (s, e) => eventRaised = true;
+
+        collection.Add(column);
+
+        Assert.IsTrue(eventRaised);
+    }
+
+    [UITestMethod]
+    public void Remove_ShouldRaiseCollectionChangedEvent()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        var column = new TableViewTextColumn();
+
+        collection.Add(column);
+
+        var eventRaised = false;
+        collection.CollectionChanged += (s, e) => eventRaised = true;
+
+        collection.Remove(column);
+
+        Assert.IsTrue(eventRaised);
+    }
+
+    [UITestMethod]
+    public void VisibleColumns_ShouldReturnOnlyVisibleColumns()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+
+        var visibleColumn = new TableViewTextColumn { Visibility = Visibility.Visible };
+        var hiddenColumn = new TableViewTextColumn { Visibility = Visibility.Collapsed };
+
+        collection.Add(visibleColumn);
+        collection.Add(hiddenColumn);
+
+        var visibleColumns = collection.VisibleColumns;
+
+        Assert.AreEqual(1, visibleColumns.Count);
+        Assert.AreEqual(visibleColumn, visibleColumns[0]);
+    }
+
+    [UITestMethod]
+    public void HandleColumnPropertyChanged_ShouldRaiseColumnPropertyChangedEvent()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        var column = new TableViewTextColumn();
+
+        collection.Add(column);
+
+        var eventRaised = false;
+        collection.ColumnPropertyChanged += (s, e) => eventRaised = true;
+
+        collection.HandleColumnPropertyChanged(column, "TestProperty");
+
+        Assert.IsTrue(eventRaised);
+    }
+
+    [UITestMethod]
+    public void HandleColumnPropertyChanged_ShouldNotRaiseEvent_ForInvalidColumn()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        var column = new TableViewTextColumn();
+
+        var eventRaised = false;
+        collection.ColumnPropertyChanged += (s, e) => eventRaised = true;
+
+        collection.HandleColumnPropertyChanged(column, "TestProperty");
+
+        Assert.IsFalse(eventRaised);
+    }
+
+    [UITestMethod]
+    public void ResetCollection_ShouldRaiseCollectionChangedEvent()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        var column1 = new TableViewTextColumn();
+        var column2 = new TableViewTextColumn();
+
+        collection.Add(column1);
+        collection.Add(column2);
+
+        var eventRaised = false;
+        collection.CollectionChanged += (s, e) =>
+        {
+            if (e.Action == NotifyCollectionChangedAction.Reset)
+            {
+                eventRaised = true;
+            }
+        };
+
+        collection.Clear();
+
+        Assert.IsTrue(eventRaised);
+    }
+
+
+    [UITestMethod]
+    public void VisibleColumns_ShouldReturnColumnsInCorrectOrder()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+
+        var column1 = new TableViewTextColumn { Header = "column1", Visibility = Visibility.Visible, Order = 1 };
+        var column2 = new TableViewTextColumn { Header = "column2", Visibility = Visibility.Visible, Order = 2 };
+        var column3 = new TableViewTextColumn { Header = "column3", Visibility = Visibility.Visible, Order = 1 };
+
+        collection.Add(column1);
+        collection.Add(column2);
+        collection.Add(column3);
+
+        var visibleColumns = collection.VisibleColumns;
+
+        Assert.AreEqual(column1, visibleColumns[0]);
+        Assert.AreEqual(column3, visibleColumns[1]);
+        Assert.AreEqual(column2, visibleColumns[2]);
+    }
+
+    [UITestMethod]
+    public void AddDuplicateColumns_ShouldHandleCorrectly()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+        var column = new TableViewTextColumn();
+
+        collection.Add(column);
+        collection.Add(column);
+
+        Assert.AreEqual(2, collection.Count);
+    }
+
+    [UITestMethod]
+    public void ColumnVisibilityChange_ShouldUpdateVisibleColumns()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+
+        var column = new TableViewTextColumn { Visibility = Visibility.Visible };
+        collection.Add(column);
+
+        Assert.AreEqual(1, collection.VisibleColumns.Count);
+
+        column.Visibility = Visibility.Collapsed;
+
+        Assert.AreEqual(0, collection.VisibleColumns.Count);
+    }
+
+    [UITestMethod]
+    public void Add_ShouldThrowException_ForInvalidObjectType()
+    {
+        var tableView = new TableView();
+        var collection = new TableViewColumnsCollection(tableView);
+
+        var invalidObject = new TextBox();
+
+        Assert.ThrowsExactly<InvalidCastException>(() => collection.Add(invalidObject));
+    }
+}