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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using FluentAssertions; | ||
| using Xunit; | ||
|
|
||
| namespace SolidStack.Core.Flow.Tests | ||
| { | ||
| public class OptionAdaptersTests | ||
| { | ||
| [Fact] | ||
| public void AsEnumerable_WhenNone_ReturnsAnEmptySequence() | ||
| { | ||
| var option = Option.None<int>(); | ||
| var sequence = option.AsEnumerable(); | ||
|
|
||
| sequence.Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void AsEnumerable_WhenSome_ReturnsASequenceOfOneElement() | ||
| { | ||
| var option = Option.Some(5); | ||
| var sequence = option.AsEnumerable(); | ||
|
|
||
| sequence.Should() | ||
| .ContainSingle(x => x == 5) | ||
| .And.HaveCount(1); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TryFirst_WithEmptySequence_ReturnsNone() | ||
| { | ||
| var sequence = Enumerable.Empty<int>(); | ||
| var option = sequence.TryFirst(); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TryFirst_WithMatchingPredicate_ReturnsSome() | ||
| { | ||
| var sequence = new[] {4, 5}; | ||
| var option = sequence.TryFirst(x => x < 5); | ||
|
|
||
| option.AsEnumerable().Should().ContainSingle(x => x == 4); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TryFirst_WithSequenceOfOneOrMoreElements_ReturnsSome() | ||
| { | ||
| var sequence = new[] {4, 5}; | ||
| var option = sequence.TryFirst(); | ||
|
|
||
| option.AsEnumerable().Should().ContainSingle(x => x == 4); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TryFirst_WithUnmatchingPredicate_ReturnsNone() | ||
| { | ||
| var sequence = Enumerable.Empty<int>(); | ||
| var option = sequence.TryFirst(x => x >= 5); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TryGetValue_WithExistingKey_ReturnsSome() | ||
| { | ||
| var dictionary = new Dictionary<string, int> {{"foo", 7}, {"bar", 3}}; | ||
| var option = dictionary.TryGetValue("foo"); | ||
|
|
||
| option.AsEnumerable().Should().ContainSingle(x => x == 7); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TryGetValue_WithUnexistingKey_ReturnsNone() | ||
| { | ||
| var dictionary = new Dictionary<string, int> {{"foo", 7}, {"bar", 3}}; | ||
| var option = dictionary.TryGetValue("baz"); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TrySingle_WhenEmptySequence_ReturnsNone() | ||
| { | ||
| var sequence = Enumerable.Empty<int>(); | ||
| var option = sequence.TrySingle(); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TrySingle_WithPredicateThatMatchManyElements_ReturnsNone() | ||
| { | ||
| var sequence = new[] {-2, 4, 5}; | ||
| var option = sequence.TrySingle(x => x < 5); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TrySingle_WithPredicateThatMatchOneElement_ReturnsSome() | ||
| { | ||
| var sequence = new[] {4, 5}; | ||
| var option = sequence.TrySingle(x => x < 5); | ||
|
|
||
| option.AsEnumerable().Should().ContainSingle(x => x == 4); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TrySingle_WithSequenceOfMoreThenOneElement_ReturnsNone() | ||
| { | ||
| var sequence = new[] {4, 5}; | ||
| var option = sequence.TrySingle(); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void TrySingle_WithUnmatchingPredicate_ReturnsNone() | ||
| { | ||
| var sequence = Enumerable.Empty<int>(); | ||
| var option = sequence.TrySingle(x => x >= 5); | ||
|
|
||
| option.AsEnumerable().Should().BeEmpty(); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void WhereSome_FiltersTheEmptyOptions() | ||
| { | ||
| var options = new[] {Option.Some(4), Option.None<int>(), Option.Some(5), Option.None<int>()}; | ||
| var values = options.WhereSome(); | ||
|
|
||
| values.Should().HaveCount(2).And.ContainInOrder(4, 5); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void WhereSome_WithPredicate_FiltersTheEmptyOptions() | ||
| { | ||
| var sequence = new[] {4, -1, 5, -3}; | ||
| var values = sequence.WhereSome(x => x >= 0 ? Option.Some(x) : Option.None<int>()); | ||
|
|
||
| values.Should().HaveCount(2).And.ContainInOrder(4, 5); | ||
| } | ||
| } | ||
| } |
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