Add tests for BitCollapase component (#11608)

src/BlazorUI/Bit.BlazorUI.Tests/Components/Surfaces/Collapse/BitCollapseTests.cs

@@ -0,0 +1,72 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Bunit;
+
+namespace Bit.BlazorUI.Tests.Components.Surfaces.Collapse;
+
+[TestClass]
+public class BitCollapseTests : BunitTestContext
+{
+    [TestMethod]
+    public void BitCollapseShouldRenderChildContent()
+    {
+        var component = RenderComponent<BitCollapse>(parameters =>
+        {
+            parameters.AddChildContent("<div class=\"content\">Hello Collapse</div>");
+        });
+
+        var collapse = component.Find(".bit-col");
+        Assert.IsNotNull(collapse);
+        Assert.IsTrue(collapse.ToMarkup().Contains("Hello Collapse"));
+    }
+
+    [DataTestMethod]
+    [DataRow(true)]
+    [DataRow(false)]
+    public void BitCollapseExpandedStateShouldApplyCorrectClasses(bool expanded)
+    {
+        var component = RenderComponent<BitCollapse>(parameters =>
+        {
+            parameters.Add(p => p.Expanded, expanded);
+            parameters.AddChildContent("<div>content</div>");
+        });
+
+        var content = component.Find(".bit-col-con");
+
+        if (expanded)
+        {
+            Assert.IsTrue(content.ClassList.Contains("bit-col-cex"));
+            Assert.IsFalse(content.ClassList.Contains("bit-col-cco"));
+        }
+        else
+        {
+            Assert.IsTrue(content.ClassList.Contains("bit-col-cco"));
+            Assert.IsFalse(content.ClassList.Contains("bit-col-cex"));
+        }
+    }
+
+    [TestMethod]
+    public void BitCollapseShouldRespectStylesAndClassesParameters()
+    {
+        var classes = new BitCollapseClassStyles { Root = "root-class", Content = "content-class", Expanded = "expanded-class" };
+        var styles = new BitCollapseClassStyles { Root = "width:1px", Content = "width:2px", Expanded = "width:3px" };
+
+        var component = RenderComponent<BitCollapse>(parameters =>
+        {
+            parameters.Add(p => p.Classes, classes);
+            parameters.Add(p => p.Styles, styles);
+            parameters.Add(p => p.Expanded, true);
+            parameters.AddChildContent("<div>content</div>");
+        });
+
+        var root = component.Find(".bit-col");
+        Assert.IsTrue(root.ClassList.Contains("root-class"));
+
+        var content = component.Find(".bit-col-con");
+        Assert.IsTrue(content.ClassList.Contains("content-class"));
+        Assert.IsTrue(root.ClassList.Contains("expanded-class"));
+
+        Assert.IsTrue(root.GetAttribute("style").Contains("width:1px"));
+        Assert.IsTrue(content.GetAttribute("style").Contains("width:2px"));
+        Assert.IsTrue(root.GetAttribute("style").Contains("width:3px"));
+    }
+}