using System; using System.Collections.Generic; using System.Collections.ObjectModel; using FruityFoundation.Base.Structures; using NUnit.Framework; namespace Base.Tests.Structures; public class MaybeExtensionTests { [Test] public void EnumerableFirstOrEmptyTests() { Assert.AreEqual(Maybe.Empty(), Array.Empty().FirstOrEmpty()); Assert.AreEqual(Maybe.Create("banana"), new[] { "banana" }.FirstOrEmpty()); } [Test] public void TestToMaybe() { Assert.AreEqual(Maybe.Empty(), Maybe.Empty()); Assert.AreNotEqual(Maybe.Create(293921), Maybe.Create(2)); } [Test] public void MaybeNullableTests() { Assert.IsNull(Maybe.Empty().ToNullable()); Assert.IsNull(Maybe.Create(0, evalIsEmpty: () => true).ToNullable()); } [Test] public void IDictionaryTests_TryGetValue_ReturnsMaybeWithValue_ForValidKey() { var dict = new Dictionary { { "one", 1 }, { "two", 2 }, { "three", 3 } }; var result = dict.TryGetValue("one"); Assert.That(result, Is.InstanceOf>()); Assert.That(result.HasValue, Is.True); Assert.That(result.Value, Is.EqualTo(1)); } [Test] public void IDictionaryTests_TryGetValue_ReturnsEmptyMaybe_ForInvalidKey() { var dict = new Dictionary { { "one", 1 }, { "two", 2 }, { "three", 3 } }; var result = dict.TryGetValue("eight"); Assert.That(result, Is.InstanceOf>()); Assert.That(result.HasValue, Is.False); } [Test] public void IReadOnlyDictionaryTests_TryGetValue_ReturnsMaybeWithValue_ForValidKey() { var baseDict = new Dictionary { { "one", 1 }, { "two", 2 }, { "three", 3 } }; IReadOnlyDictionary dict = new ReadOnlyDictionary(baseDict); var result = dict.TryGet("one"); Assert.That(result, Is.InstanceOf>()); Assert.That(result.HasValue, Is.True); Assert.That(result.Value, Is.EqualTo(1)); } [Test] public void IIReadOnlyDictionaryTests_TryGetValue_ReturnsEmptyMaybe_ForInvalidKey() { var baseDict = new Dictionary { { "one", 1 }, { "two", 2 }, { "three", 3 } }; IReadOnlyDictionary dict = new ReadOnlyDictionary(baseDict); var result = dict.TryGet("eight"); Assert.That(result, Is.InstanceOf>()); Assert.That(result.HasValue, Is.False); } }