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Add unit tests for ICollectionView
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‎tests/CollectionExtensionsTests.cs‎

Lines changed: 149 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,6 @@
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using Microsoft.UI.Xaml.Data;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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using Microsoft.VisualStudio.TestTools.UnitTesting.AppContainer;
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using System.Collections;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
@@ -97,6 +99,46 @@ public void IndexOf_IList_EmptyList_ReturnsNegativeOne()
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Assert.AreEqual(-1, list.IndexOf("a"));
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}
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[UITestMethod]
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public void IndexOf_ICollectionView_FindsItemAtCorrectIndex()
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{
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var list = new List<string> { "a", "b", "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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Assert.AreEqual(1, collectionView.IndexOf("b"));
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}
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[UITestMethod]
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public void IndexOf_ICollectionView_ReturnsNegativeOneWhenNotFound()
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{
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var list = new List<string> { "a", "b", "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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Assert.AreEqual(-1, collectionView.IndexOf("d"));
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}
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[UITestMethod]
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public void IndexOf_ICollectionView_FindsNullItem()
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{
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var list = new List<string?> { "a", null, "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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Assert.AreEqual(1, collectionView.IndexOf(null));
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}
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[UITestMethod]
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public void IndexOf_ICollectionView_ReturnsFirstOccurrence()
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{
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var list = new List<int> { 1, 2, 3, 2, 4 };
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var collectionView = new CollectionViewSource { Source = list }.View;
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Assert.AreEqual(1, collectionView.IndexOf(2));
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}
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[UITestMethod]
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public void IndexOf_ICollectionView_EmptyList_ReturnsNegativeOne()
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{
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var list = new List<string>();
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var collectionView = new CollectionViewSource { Source = list }.View;
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Assert.AreEqual(-1, collectionView.IndexOf("a"));
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}
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[TestMethod]
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public void IndexOf_ArrayList_FindsItemAtCorrectIndex()
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{
@@ -151,6 +193,14 @@ public void IsReadOnly_ReadOnlyCollection_ReturnsTrue()
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Assert.IsTrue(readOnly.IsReadOnly());
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}
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[UITestMethod]
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public void IsReadOnly_ICollectionView_ReturnsFalse()
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{
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var list = new List<int> { 1, 2, 3 };
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var collectionView = new CollectionViewSource { Source = list }.View;
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Assert.IsFalse(collectionView.IsReadOnly());
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}
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[TestMethod]
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public void IsReadOnly_Array_ReturnsFalse()
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{
@@ -199,6 +249,24 @@ public void Add_IList_AddsNullItem()
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CollectionAssert.AreEqual(new[] { "a", "b", null }, list);
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}
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[UITestMethod]
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public void Add_ICollectionView_AddsItem()
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{
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var list = new List<string> { "a", "b" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Add("c");
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CollectionAssert.AreEqual(new[] { "a", "b", "c" }, list);
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}
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[UITestMethod]
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public void Add_ICollectionView_AddsNullItem()
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{
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var list = new List<string?> { "a", "b" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Add(null);
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CollectionAssert.AreEqual(new[] { "a", "b", null }, list);
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}
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[TestMethod]
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public void Add_ArrayList_AddsItem()
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{
@@ -267,6 +335,42 @@ public void Insert_IList_InsertsNull()
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CollectionAssert.AreEqual(new[] { "a", null, "b" }, list);
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}
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[UITestMethod]
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public void Insert_ICollectionView_InsertsItemAtIndex()
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{
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var list = new List<string> { "a", "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Insert(1, "b");
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CollectionAssert.AreEqual(new[] { "a", "b", "c" }, list);
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}
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[UITestMethod]
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public void Insert_ICollectionView_InsertsAtBeginning()
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{
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var list = new List<int> { 2, 3 };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Insert(0, 1);
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CollectionAssert.AreEqual(new[] { 1, 2, 3 }, list);
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}
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[UITestMethod]
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public void Insert_ICollectionView_InsertsAtEnd()
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{
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var list = new List<int> { 1, 2 };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Insert(2, 3);
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CollectionAssert.AreEqual(new[] { 1, 2, 3 }, list);
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}
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[UITestMethod]
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public void Insert_ICollectionView_InsertsNull()
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{
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var list = new List<string?> { "a", "b" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Insert(1, null);
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CollectionAssert.AreEqual(new[] { "a", null, "b" }, list);
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}
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[TestMethod]
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public void Insert_ArrayList_InsertsItemAtIndex()
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{
@@ -335,6 +439,42 @@ public void Remove_IList_NonExistentItem_DoesNothing()
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CollectionAssert.AreEqual(new[] { "a", "b", "c" }, list);
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}
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[UITestMethod]
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public void Remove_ICollectionView_RemovesItem()
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{
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var list = new List<string> { "a", "b", "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Remove("b");
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CollectionAssert.AreEqual(new[] { "a", "c" }, list);
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}
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[UITestMethod]
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public void Remove_ICollectionView_RemovesFirstOccurrence()
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{
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var list = new List<int> { 1, 2, 3, 2, 4 };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Remove(2);
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CollectionAssert.AreEqual(new[] { 1, 3, 2, 4 }, list);
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}
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[UITestMethod]
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public void Remove_ICollectionView_RemovesNull()
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{
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var list = new List<string?> { "a", null, "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Remove(null);
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CollectionAssert.AreEqual(new[] { "a", "c" }, list);
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}
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[UITestMethod]
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public void Remove_ICollectionView_NonExistentItem_DoesNothing()
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{
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var list = new List<string> { "a", "b", "c" };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Remove("d");
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CollectionAssert.AreEqual(new[] { "a", "b", "c" }, list);
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}
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[TestMethod]
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public void Remove_ArrayList_RemovesItem()
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{
@@ -379,6 +519,15 @@ public void Clear_IList_RemovesAllItems()
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Assert.AreEqual(0, list.Count);
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}
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[UITestMethod]
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public void Clear_ICollectionView_RemovesAllItems()
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{
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var list = new List<int> { 1, 2, 3, 4, 5 };
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var collectionView = new CollectionViewSource { Source = list }.View;
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collectionView.Clear();
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Assert.AreEqual(0, list.Count);
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}
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[TestMethod]
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public void Clear_ArrayList_RemovesAllItems()
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{

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