Reorganize Traits tests

GW2SDK.Tests/Features/Traits/TraitById.cs

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+using System.Threading.Tasks;
+using GuildWars2.Tests.TestInfrastructure;
+using Xunit;
+
+namespace GuildWars2.Tests.Features.Traits;
+
+public class TraitById
+{
+    [Fact]
+    public async Task Can_be_found()
+    {
+        var sut = Composer.Resolve<Gw2Client>();
+
+        const int id = 214;
+
+        var actual = await sut.Traits.GetTraitById(id);
+
+        Assert.Equal(id, actual.Value.Id);
+    }
+}

GW2SDK.Tests/Features/Traits/Traits.cs

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+using System.Threading.Tasks;
+using GuildWars2.Tests.TestInfrastructure;
+using Xunit;
+
+namespace GuildWars2.Tests.Features.Traits;
+
+public class Traits
+{
+    [Fact]
+    public async Task Can_be_listed()
+    {
+        var sut = Composer.Resolve<Gw2Client>();
+
+        var actual = await sut.Traits.GetTraits();
+
+        Assert.Equal(actual.ResultContext.ResultTotal, actual.Value.Count);
+        Assert.All(
+            actual.Value,
+            trait =>
+            {
+                trait.Id_is_positive();
+            }
+        );
+    }
+}

GW2SDK.Tests/Features/Traits/TraitsByFilter.cs

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+using System.Collections.Generic;
+using System.Threading.Tasks;
+using GuildWars2.Tests.TestInfrastructure;
+using Xunit;
+
+namespace GuildWars2.Tests.Features.Traits;
+
+public class TraitsByFilter
+{
+    [Fact]
+    public async Task Can_be_filtered_by_id()
+    {
+        var sut = Composer.Resolve<Gw2Client>();
+
+        HashSet<int> ids = new()
+        {
+            214,
+            221,
+            222
+        };
+
+        var actual = await sut.Traits.GetTraitsByIds(ids);
+
+        Assert.Collection(
+            ids,
+            first => Assert.Contains(actual.Value, found => found.Id == first),
+            second => Assert.Contains(actual.Value, found => found.Id == second),
+            third => Assert.Contains(actual.Value, found => found.Id == third)
+        );
+    }
+}

GW2SDK.Tests/Features/Traits/TraitsByPage.cs

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+using System.Threading.Tasks;
+using GuildWars2.Tests.TestInfrastructure;
+using Xunit;
+
+namespace GuildWars2.Tests.Features.Traits;
+
+public class TraitsByPage
+{
+    [Fact]
+    public async Task Can_be_filtered_by_page()
+    {
+        var sut = Composer.Resolve<Gw2Client>();
+
+        var actual = await sut.Traits.GetTraitsByPage(0, 3);
+
+        Assert.Equal(3, actual.Value.Count);
+        Assert.Equal(3, actual.PageContext.PageSize);
+    }
+}

GW2SDK.Tests/Features/Traits/TraitsIndex.cs

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+using System.Threading.Tasks;
+using GuildWars2.Tests.TestInfrastructure;
+using Xunit;
+
+namespace GuildWars2.Tests.Features.Traits;
+
+public class TraitsIndex
+{
+    [Fact]
+    public async Task Is_not_empty()
+    {
+        var sut = Composer.Resolve<Gw2Client>();
+
+        var actual = await sut.Traits.GetTraitsIndex();
+
+        Assert.Equal(actual.ResultContext.ResultTotal, actual.Value.Count);
+    }
+}