121 lines
4.2 KiB
C#
121 lines
4.2 KiB
C#
#region Apache License 2.0
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/*
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Nuclex .NET Framework
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Copyright (C) 2002-2024 Markus Ewald / Nuclex Development Labs
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#endregion // Apache License 2.0
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using System;
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using System.ComponentModel;
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using NUnit.Framework;
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namespace Nuclex.Support {
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/// <summary>Unit tests for the property change event argument helper</summary>
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[TestFixture]
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internal class PropertyChangedEventArgsHelperTest {
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#region class TestViewModel
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/// <summary>Example class on which unit test generates change notifications</summary>
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public class TestViewModel {
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/// <summary>Example property that will be reported to have changed</summary>
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public int SomeProperty { get; set; }
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}
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#endregion // class TestViewModel
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/// <summary>
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/// Verifies that a property change notification matching the property
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/// passed to the AreAffecting() method is recognized
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/// </summary>
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[Test]
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public void MatchingPropertyChangeNotificationIsRecognized() {
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var arguments = new PropertyChangedEventArgs("SomeProperty");
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#pragma warning disable 0618
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Assert.IsTrue(arguments.AreAffecting(() => ViewModel.SomeProperty));
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#pragma warning restore 0618
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Assert.IsTrue(arguments.AreAffecting("SomeProperty"));
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}
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/// <summary>
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/// Ensures that a mismatching property change notification will
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/// not report the property as being affected.
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/// </summary>
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[Test]
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public void MismatchingPropertyIsReportedAsUnaffected() {
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var arguments = new PropertyChangedEventArgs("AnotherProperty");
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#pragma warning disable 0618
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Assert.IsFalse(arguments.AreAffecting(() => ViewModel.SomeProperty));
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#pragma warning restore 0618
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Assert.IsFalse(arguments.AreAffecting("SomeProperty"));
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}
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/// <summary>
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/// Verifies that any specific property is reported as being affected
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/// when the property change notification is a null wildcard
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/// </summary>
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[Test]
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public void SpecificPropertyIsAffectedByNullWildcard() {
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var nullArguments = new PropertyChangedEventArgs(null);
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#pragma warning disable 0618
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Assert.IsTrue(nullArguments.AreAffecting(() => ViewModel.SomeProperty));
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#pragma warning restore 0618
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Assert.IsTrue(nullArguments.AreAffecting("SomeProperty"));
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}
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/// <summary>
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/// Verifies that any specific property is reported as being affected
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/// when the property change notification is an empty wildcard
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/// </summary>
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[Test]
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public void SpecificPropertyIsAffectedByEmptyWildcard() {
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var emptyArguments = new PropertyChangedEventArgs(string.Empty);
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#pragma warning disable 0618
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Assert.IsTrue(emptyArguments.AreAffecting(() => ViewModel.SomeProperty));
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#pragma warning disable 0618
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Assert.IsTrue(emptyArguments.AreAffecting("SomeProperty"));
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}
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/// <summary>
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/// Tests whether the helper can recognize a wildcard property change
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/// notification using null as the wildcard.
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/// </summary>
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[Test]
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public void NullWildcardIsRecognized() {
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var nullArguments = new PropertyChangedEventArgs(null);
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Assert.IsTrue(nullArguments.AffectAllProperties());
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}
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/// <summary>
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/// Tests whether the helper can recognize a wildcard property change
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/// notification using an empty string as the wildcard.
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/// </summary>
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[Test]
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public void EmptyWildcardIsRecognized() {
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var emptyArguments = new PropertyChangedEventArgs(string.Empty);
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Assert.IsTrue(emptyArguments.AffectAllProperties());
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}
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/// <summary>Helper used to construct lambda expressions</summary>
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protected static TestViewModel ViewModel { get; set; }
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}
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} // namespace Nuclex.Support
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