From ad6f07e0c5c848b109f0024ad45a7ba8297e0a17 Mon Sep 17 00:00:00 2001
From: "Ricardo Bossan (BEYONDSOFT CONSULTING INC) (from Dev Box)"
 <v-rbossan@microsoft.com>
Date: Fri, 13 Sep 2024 11:49:27 -0300
Subject: [PATCH] Adds code coverage for RichTextBoxActionList

Related #10773

## Proposed changes

- Adds code coverage for `RichTextBoxActionList`
- Coverage for the `EditLines()` method could not be added. The
dependent method `EditorServiceContext.EditValue(_designer, Component!,
"Lines")` is static and could not be mocked, and the dialog that opens
during its execution requires manual intervention to close.

## Customer Impact

- None or succinct description

## Regression?

- No

## Risk

- Minimal

## Test methodology

- Unit tests

## Test environment(s)

- 9.0.100-preview.7.24407.12
---
 .../Design/RichTextBoxActionListTests.cs      | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/RichTextBoxActionListTests.cs

diff --git a/src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/RichTextBoxActionListTests.cs b/src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/RichTextBoxActionListTests.cs
new file mode 100644
index 00000000000..63a66c6e25f
--- /dev/null
+++ b/src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/RichTextBoxActionListTests.cs
@@ -0,0 +1,27 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#nullable enable
+
+namespace System.Windows.Forms.Design.Tests;
+
+public sealed class RichTextBoxActionListTests
+{
+    [Fact]
+    public void GetSortedActions_WithNull_ThrowsException()
+    {
+        Action action = () => new RichTextBoxActionList(null!);
+        action.Should().Throw<Exception>();
+    }
+
+    [Fact]
+    public void GetSortedActions_WithDesigner_GetsCorrectItemsCount()
+    {
+        using RichTextBoxDesigner designer = new();
+        using RichTextBox richTextBox = new();
+        designer.Initialize(richTextBox);
+        var actionList = new RichTextBoxActionList(designer);
+
+        actionList.GetSortedActionItems().Count.Should().Be(1);
+    }
+}