94 lines
2.2 KiB
C#
94 lines
2.2 KiB
C#
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 MaybeTests
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{
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[Test]
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public void TestBind_DoesNotBindEmptyValue()
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{
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var emptyMaybe = Maybe.Empty<int>();
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var result = emptyMaybe.Bind(x => Maybe.Just(x + 1));
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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 TestBind_BindsWhenHasValue()
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{
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var emptyMaybe = Maybe.Just<int>(1);
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var result = emptyMaybe.Bind(x => Maybe.Just(x + 1));
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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(2));
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}
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[Test]
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public void TestBind_BindsWhenHasValue_NewOutputType()
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{
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var maybe = Maybe.Just(25);
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var result = maybe.Bind(x => x switch
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{
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25 => Maybe.Just("twenty-five"),
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_ => Maybe.Empty<string>()
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});
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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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}
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[Test]
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public void EmptyBind_DoesNotBindFactory_WhenHasValue()
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{
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var maybe = Maybe.Just(25);
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var result = maybe.EmptyBind(() => Maybe.Just(30));
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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(25));
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}
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[Test]
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public void EmptyBind_BindsFactory_WhenDoesNotHaveValue()
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{
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var maybe = Maybe.Empty<int>();
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var result = maybe.EmptyBind(() => Maybe.Just(30));
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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(30));
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}
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[Test]
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public void EmptyBind_DoesNotBindMaybe_WhenHasValue()
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{
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var maybe = Maybe.Just(25);
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var result = maybe.EmptyBind(Maybe.Just(30));
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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(25));
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}
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[Test]
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public void EmptyBind_BindsMaybe_WhenDoesNotHaveValue()
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{
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var maybe = Maybe.Empty<int>();
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var result = maybe.EmptyBind(Maybe.Just(30));
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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(30));
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}
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}
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