60 lines
1.3 KiB
C#
60 lines
1.3 KiB
C#
using System.Linq;
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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 NullableExtensionTests
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{
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[Test]
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public void TestNullableStructOfNullToMaybe() =>
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Assert.AreEqual(Maybe.Empty<int>(), ((int?)null).ToMaybe());
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[Test]
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public void TestNullableStructOfValueToMaybe() =>
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Assert.AreEqual(Maybe.Create(25), ((int?)25).ToMaybe());
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[Test]
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public void TestNullableReferenceOfNullAsMaybe()
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{
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string? nullableString = null;
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var result = nullableString.AsMaybe();
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Assert.That(result, Is.InstanceOf<Maybe<string>>());
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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 TestNullableReferenceOfValueAsMaybe()
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{
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string? nullableString = "banana";
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var result = nullableString.AsMaybe();
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Assert.That(result, Is.InstanceOf<Maybe<string>>());
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Assert.That(result.HasValue, Is.True);
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Assert.That(result.Value, Is.EqualTo("banana"));
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}
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[Test]
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public void TestNullableReferenceAsMaybeWorksWithChoose()
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{
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string?[] stringCollection =
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[
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"banana",
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"bob",
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null
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];
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var result = stringCollection
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.Choose(x => x.AsMaybe())
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.ToArray();
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Assert.That(result, Is.InstanceOf<string[]>());
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Assert.That(result, Has.Length.EqualTo(2));
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Assert.That(result[0], Is.EqualTo("banana"));
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Assert.That(result[1], Is.EqualTo("bob"));
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}
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}
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