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91 changes: 91 additions & 0 deletions
91
ScoutHelperTests/Utils/Functional/FunctionalExtensionsTest.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| using CSharpFunctionalExtensions; | ||
| using FluentAssertions; | ||
| using FsCheck; | ||
| using FsCheck.Xunit; | ||
| using JetBrains.Annotations; | ||
| using ScoutHelper; | ||
| using ScoutHelper.Utils.Functional; | ||
| using ScoutHelperTests.TestUtils.FsCheck; | ||
| using static ScoutHelperTests.TestUtils.FsCheck.FsCheckUtils; | ||
|
|
||
| namespace ScoutHelperTests.Utils.Functional; | ||
|
|
||
| [TestSubject(typeof(FunctionalExtensions))] | ||
| public class FunctionalExtensionsTest { | ||
| [Property] | ||
| public Property MaybeGet_MissingKey() => ForAll( | ||
| Arbs.String().DictWith(Arbs.String()), | ||
| Arbs.String(), | ||
| (arbitraryDict, lookupKey) => { | ||
| // DATA | ||
| var dict = arbitraryDict.Without(lookupKey); | ||
| // WHEN | ||
| var actual = dict.MaybeGet(lookupKey); | ||
| // THEN | ||
| actual.Should().Be(Maybe<string>.None); | ||
| } | ||
| ); | ||
|
|
||
| [Property] | ||
| public Property MaybeGet_ContainsKey() => ForAll( | ||
| Arbs.String().DictWith(Arbs.String()), | ||
| Arbs.String(), | ||
| Arbs.String(), | ||
| (arbitraryDict, lookupKey, lookupValue) => { | ||
| // DATA | ||
| var dict = arbitraryDict.With((lookupKey, lookupValue)); | ||
| // WHEN | ||
| var actual = dict.MaybeGet(lookupKey); | ||
| // THEN | ||
| actual.Should().Be(Maybe.From(lookupValue)); | ||
| } | ||
| ); | ||
|
|
||
| [Property] | ||
| public Property MaybeGet_EmptyDict() => ForAll( | ||
| Arbs.String(), | ||
| lookupKey => { | ||
| // DATA | ||
| var dict = new Dictionary<string, string>(); | ||
| // WHEN | ||
| var actual = dict.MaybeGet(lookupKey); | ||
| // THEN | ||
| actual.Should().Be(Maybe<string>.None); | ||
| } | ||
| ); | ||
|
|
||
| [Property] | ||
| public Property SelectMaybe_ExistingList() => ForAll( | ||
| Arbs.String().ToMaybeArb().NonEmptyListOf(), | ||
| (list) => { | ||
| // DATA | ||
| var expectedValues = list | ||
| .Where(maybe => !Maybe<string>.None.Equals(maybe)) | ||
| .Select(value => value.Value); | ||
| // WHEN | ||
| var actual = list.SelectMaybe(); | ||
| // THEN | ||
| actual.Should().BeEquivalentTo(expectedValues); | ||
| } | ||
| ); | ||
|
|
||
| // select maybe | ||
| // reduce | ||
|
|
||
| // == result == | ||
| // as pair | ||
| // for each error | ||
| // join | ||
| // select results | ||
| // select values | ||
| // to accresult | ||
| // with value | ||
| } |