From fbfaac0e4709e208282c56a2a807d093164f17c1 Mon Sep 17 00:00:00 2001
From: Jamie Pollock <jamie.pollock@rhythmagency.com>
Date: Tue, 23 Jan 2024 17:35:20 -0500
Subject: [PATCH] feat (Tests): adds link tag helper renderer tests

---
 .../{Components => }/FakeComponent.cs         |  2 +-
 .../DefaultLinkTagHelperRendererTests.cs      | 99 +++++++++++++++++++
 2 files changed, 100 insertions(+), 1 deletion(-)
 rename tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/{Components => }/FakeComponent.cs (64%)
 create mode 100644 tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Links/DefaultLinkTagHelperRendererTests.cs

diff --git a/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Components/FakeComponent.cs b/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/FakeComponent.cs
similarity index 64%
rename from tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Components/FakeComponent.cs
rename to tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/FakeComponent.cs
index c16373d..ed22259 100644
--- a/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Components/FakeComponent.cs
+++ b/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/FakeComponent.cs
@@ -1,4 +1,4 @@
-namespace Rhythm.Drop.Web.Tests.TagHelperRenderers.Components;
+namespace Rhythm.Drop.Web.Tests.TagHelperRenderers;
 using Rhythm.Drop.Models.Components;
 
 internal class FakeComponent : IComponent
diff --git a/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Links/DefaultLinkTagHelperRendererTests.cs b/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Links/DefaultLinkTagHelperRendererTests.cs
new file mode 100644
index 0000000..ae6e442
--- /dev/null
+++ b/tests/Rhythm.Drop.Web.Tests/TagHelperRenderers/Links/DefaultLinkTagHelperRendererTests.cs
@@ -0,0 +1,99 @@
+namespace Rhythm.Drop.Web.Tests.TagHelperRenderers.Links;
+
+using Microsoft.AspNetCore.Html;
+using Microsoft.AspNetCore.Razor.TagHelpers;
+using Rhythm.Drop.Models.Common.Attributes;
+using Rhythm.Drop.Models.Links;
+using Rhythm.Drop.Models.Modals;
+using Rhythm.Drop.Web.TagHelperRenderers.Links;
+using System.Threading.Tasks;
+
+[TestFixture]
+public class DefaultLinkTagHelperRendererTests : TagHelperRendererTestsBase
+{
+    private const string DefaultUrl = "#";
+
+    private const string DefaultLabel = "Click Me";
+
+    private const string HrefAttributeName = "href";
+
+    [Test]
+    public async Task RenderAsync_With_No_Link_Should_Return_Nothing()
+    {
+        var tagHelperRenderer = new DefaultDropLinkTagHelperRenderer();
+        var context = CreateTagHelperContext(DefaultTagName);
+        var output = CreateTagHelperOutput(DefaultTagName);
+
+        await tagHelperRenderer.RenderAsync(default, context, output);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(output.TagName, Is.Not.EqualTo(DefaultTagName));
+            Assert.That(output.Content.IsModified, Is.False);
+        });
+    }
+
+    [Test]
+    public async Task RenderAsync_With_Anchor_Link_Should_Return_Modified_Content()
+    {
+        var tagHelperRenderer = new DefaultDropLinkTagHelperRenderer();
+        var context = CreateTagHelperContext(DefaultTagName);
+        var output = CreateTagHelperOutput(DefaultTagName);        
+        var link = CreateAnchorLink(DefaultUrl);
+
+        await tagHelperRenderer.RenderAsync(link, context, output);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(output.TagName, Is.EqualTo("a"));
+            Assert.That(output.Attributes, Has.One.Matches<TagHelperAttribute>(x => x.Name == HrefAttributeName && x.Value.ToString() == DefaultUrl));
+            Assert.That(output.Content.IsModified, Is.True);
+        });
+    }
+
+    [Test]
+    public async Task RenderAsync_With_Modal_Link_Should_Return_Modified_Content()
+    {
+        var tagHelperRenderer = new DefaultDropLinkTagHelperRenderer();
+        var context = CreateTagHelperContext(DefaultTagName);
+        var output = CreateTagHelperOutput(DefaultTagName);
+
+        var modal = new Modal("test", [new FakeComponent()]);
+        var link = new ModalLink(modal, "Click Me", ReadOnlyHtmlAttributeCollection.Empty());
+
+        await tagHelperRenderer.RenderAsync(link, context, output);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(output.TagName, Is.EqualTo("button"));
+            Assert.That(output.Attributes, Has.One.Matches<TagHelperAttribute>(x => x.Name == "data-modal-target" && x.Value.ToString() == "test"));
+            Assert.That(output.Content.IsModified, Is.True);
+        });
+    }
+
+    [Test]
+    public async Task RenderAsync_With_Link_And_Existing_Content_Should_Return_Only_Outter_Modified_Content()
+    {
+        var tagHelperRenderer = new DefaultDropLinkTagHelperRenderer();
+        var context = CreateTagHelperContext(DefaultTagName);
+        var output = CreateTagHelperOutput(DefaultTagName, new HtmlString("Existing Content"));
+
+        var link = CreateAnchorLink(DefaultUrl);
+        await tagHelperRenderer.RenderAsync(link, context, output);
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(output.TagName, Is.EqualTo("a"));
+            Assert.That(output.Attributes, Has.One.Matches<TagHelperAttribute>(x => x.Name == HrefAttributeName && x.Value.ToString() == DefaultUrl));
+            Assert.That(output.Content.IsModified, Is.False);
+        });
+    }
+
+    private static AnchorLink CreateAnchorLink(string url)
+    {
+        var linkAttributes = new HtmlAttributeCollection();
+        linkAttributes.SetAttribute("href", url);
+
+        return new AnchorLink(DefaultLabel, linkAttributes.ToReadOnly());
+    }
+}