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Prefab.Tests/Unit/Web/Url/UrlPolicyShould.cs

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+using Prefab.Tests;
+using Prefab.Web.UrlPolicy;
+using Shouldly;
+
+namespace Prefab.Tests.Unit.Web.Url;
+
+[Trait(TraitName.Category, TraitCategory.Unit)]
+public sealed class UrlPolicyShould
+{
+    [Fact]
+    public void BuildAndParseCategoryRoundTrip()
+    {
+        var url = UrlPolicy.Category(
+            slug: "ceiling-supports",
+            page: 2,
+            pageSize: 48,
+            sort: "price:desc",
+            view: "list");
+
+        var uri = new Uri("https://prefab.test" + url);
+
+        UrlPolicy.TryParseCategory(uri, out var slug, out var page, out var pageSize, out var sort, out var view)
+            .ShouldBeTrue();
+
+        slug.ShouldBe("ceiling-supports");
+        page.ShouldBe(2);
+        pageSize.ShouldBe(48);
+        sort.ShouldBe("price:desc");
+        view.ShouldBe("list");
+
+        UrlPolicy.Category(slug, page, pageSize, sort, view).ShouldBe(url);
+    }
+
+    [Fact]
+    public void ParseCategoryDefaultsWhenMissingOrInvalid()
+    {
+        var url = UrlPolicy.Category(
+            slug: "boxes-and-covers",
+            page: 0,
+            pageSize: 500,
+            sort: null,
+            view: string.Empty);
+
+        UrlPolicy.TryParseCategory(new Uri(url, UriKind.Relative), out var slug, out var page, out var pageSize, out var sort, out var view)
+            .ShouldBeTrue();
+
+        slug.ShouldBe("boxes-and-covers");
+        page.ShouldBe(UrlPolicy.DefaultPage);
+        pageSize.ShouldBe(UrlPolicy.DefaultPageSize);
+        sort.ShouldBe(UrlPolicy.DefaultSort);
+        view.ShouldBe(UrlPolicy.DefaultView);
+    }
+
+    [Fact]
+    public void BuildAndParseProductsRoundTrip()
+    {
+        var url = UrlPolicy.Products(
+            page: 3,
+            pageSize: 12,
+            sort: "name:desc",
+            view: "grid");
+
+        var uri = new Uri("https://prefab.test" + url);
+
+        UrlPolicy.TryParseProducts(uri, out var page, out var pageSize, out var sort, out var view)
+            .ShouldBeTrue();
+
+        page.ShouldBe(3);
+        pageSize.ShouldBe(12);
+        sort.ShouldBe("name:desc");
+        view.ShouldBe("grid");
+
+        UrlPolicy.Products(page, pageSize, sort, view).ShouldBe(url);
+    }
+}