100 lines
2.4 KiB
C#
100 lines
2.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using FruityFoundation.Base.Structures;
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using NUnit.Framework;
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namespace Base.Tests.Structures;
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public class MaybeExtensionTests
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{
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[Test]
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public void EnumerableFirstOrEmptyTests()
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{
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Assert.That(Array.Empty<string>().FirstOrEmpty(), Is.EqualTo(Maybe.Empty<string>()));
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Assert.That(new[] { "banana" }.FirstOrEmpty(), Is.EqualTo(Maybe.Create<string>("banana")));
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}
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[Test]
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public void TestToMaybe()
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{
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Assert.That(Maybe.Empty<int>(), Is.EqualTo(Maybe.Empty<int>()));
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Assert.That(Maybe.Create(2), Is.Not.EqualTo(Maybe.Create(293921)));
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}
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[Test]
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public void MaybeNullableTests()
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{
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Assert.That(Maybe.Empty<int>().ToNullable(), Is.Null);
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Assert.That(Maybe.Create(0, evalIsEmpty: () => true).ToNullable(), Is.Null);
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}
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[Test]
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public void IDictionaryTests_TryGetValue_ReturnsMaybeWithValue_ForValidKey()
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{
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var dict = new Dictionary<string, int>
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{
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{ "one", 1 },
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{ "two", 2 },
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{ "three", 3 }
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};
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var result = dict.TryGetValue("one");
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Assert.That(result, Is.InstanceOf<Maybe<int>>());
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Assert.That(result.HasValue, Is.True);
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Assert.That(result.Value, Is.EqualTo(1));
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}
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[Test]
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public void IDictionaryTests_TryGetValue_ReturnsEmptyMaybe_ForInvalidKey()
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{
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var dict = new Dictionary<string, int>
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{
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{ "one", 1 },
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{ "two", 2 },
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{ "three", 3 }
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};
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var result = dict.TryGetValue("eight");
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Assert.That(result, Is.InstanceOf<Maybe<int>>());
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Assert.That(result.HasValue, Is.False);
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}
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[Test]
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public void IReadOnlyDictionaryTests_TryGetValue_ReturnsMaybeWithValue_ForValidKey()
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{
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var baseDict = new Dictionary<string, int>
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{
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{ "one", 1 },
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{ "two", 2 },
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{ "three", 3 }
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};
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IReadOnlyDictionary<string, int> dict = new ReadOnlyDictionary<string, int>(baseDict);
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var result = dict.TryGet("one");
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Assert.That(result, Is.InstanceOf<Maybe<int>>());
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Assert.That(result.HasValue, Is.True);
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Assert.That(result.Value, Is.EqualTo(1));
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}
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[Test]
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public void IIReadOnlyDictionaryTests_TryGetValue_ReturnsEmptyMaybe_ForInvalidKey()
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{
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var baseDict = new Dictionary<string, int>
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{
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{ "one", 1 },
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{ "two", 2 },
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{ "three", 3 }
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};
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IReadOnlyDictionary<string, int> dict = new ReadOnlyDictionary<string, int>(baseDict);
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var result = dict.TryGet("eight");
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Assert.That(result, Is.InstanceOf<Maybe<int>>());
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Assert.That(result.HasValue, Is.False);
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}
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}
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