Re-enable a test in SmartApplyTests.cs (#382)

The SmartApply tests were failing inconsistently due to several issues:

**Problems Fixed**
Apply button not clickable - The button exists in DOM with tw-hidden
class on narrow viewports. Changed wait strategy from `WaitForAsync()`
(waits for visible) to `WaitForAsync(State.Attached)` (waits for element
in DOM), then remove hidden class before clicking.

**Missing file context** - File context chips weren't appearing in chat
input on the first SmartApply test run, causing the LLM to respond
without code suggestions (no Apply button). Added a dummy warm-up test
to initialize file context functionality. The ApplyLastSuggestionFor
helper now waits for context chips before sending prompts.

**Insufficient timeout** - Increased timeout to 60s to accommodate LLM
response times.

**Test file improvements** - Added intentional typo to `Manager.cs` to
ensure LLM reliably provides code suggestions.

### Known Issue
The dummy warm-up test is a workaround. The root cause of why file
context chips don't appear on first test run needs investigation -
likely a timing or initialization issue.

## Test plan
Green and more deterministic CI.

<!-- REQUIRED; info at
https://docs-legacy.sourcegraph.com/dev/background-information/testing_principles
-->

Author: mkondratek

src/Cody.VisualStudio.Tests/SmartApplyTests.cs

@@ -38,57 +38,66 @@ public SmartApplyTests(ITestOutputHelper output) : base(output)
         }
 
         [VsFact(Version = VsVersion.VS2022)]
-        public async Task Apply_Suggestion_Is_Modifying_Point_Document()
+        public async Task Apply_Suggestion_Is_Modifying_Dummy_Document()
         {
-            // given
+            // TODO: This is a workaround. Without this test, the first SmartApply test fails
+            // because file context chips don't appear in the chat input, causing the LLM to
+            // respond without code suggestions. Running this dummy test first somehow fixes it.
+            // The root cause needs investigation - likely a timing or initialization issue
+            // in how file context is added to chat on first document open.
             await NewChat();
+            await OpenSolution(SolutionsPaths.GetConsoleApp1File("ConsoleApp1.sln"));
+            await OpenDocument(SolutionsPaths.GetConsoleApp1File(@"ConsoleApp1\Point.cs"));
+        }
 
+        [VsFact(Version = VsVersion.VS2022)]
+        public async Task Apply_Suggestion_Is_Modifying_Point_Document()
+        {
+            await NewChat();
             await OpenSolution(SolutionsPaths.GetConsoleApp1File("ConsoleApp1.sln"));
             await OpenDocument(SolutionsPaths.GetConsoleApp1File(@"ConsoleApp1\Point.cs"));
 
             var originalText = await GetActiveDocumentText();
 
-            // when
             await ApplyLastSuggestionFor("Suggest improvements");
 
             var modifiedText = await GetActiveDocumentText();
 
-            // then
             Assert.NotEqual(modifiedText, originalText);
         }
 
-        [VsFact(Version = VsVersion.VS2022, Skip = "Unstable")]
+        [VsFact(Version = VsVersion.VS2022)]
         public async Task Apply_Suggestion_Is_Modifying_Manager_Document()
         {
-            // given
             await NewChat();
-
             await OpenSolution(SolutionsPaths.GetConsoleApp1File("ConsoleApp1.sln"));
             await OpenDocument(SolutionsPaths.GetConsoleApp1File(@"ConsoleApp1\Manager.cs"));
 
             var originalText = await GetActiveDocumentText();
 
-            // when
             await ApplyLastSuggestionFor("Suggest improvements in Print() method");
 
             var modifiedText = await GetActiveDocumentText();
 
-            // then
             Assert.NotEqual(modifiedText, originalText);
         }
 
         private async Task ApplyLastSuggestionFor(string chatText)
         {
+            var contextChipLocator = Page.Locator("[aria-label='Chat message'] span[data-lexical-decorator='true']");
+            await contextChipLocator.First.WaitForAsync(new() { Timeout = 5000 });
+            
             await EnterChatTextAndSend(chatText);
 
             var apply = Page.Locator("span", new() { HasText = "Apply" }).Last;
 
-            // checking if Chat window is too narrow to show "Apply" text
+            await apply.WaitForAsync(new() { Timeout = 60000, State = WaitForSelectorState.Attached });
+
             var hasHiddenClass = await apply.EvaluateAsync<bool>(@"element => element.classList.contains('tw-hidden')");
             if (hasHiddenClass)
-                await apply.EvaluateAsync("element => element.classList.remove('tw-hidden')"); // force shows "Apply" text so it will be possible to click on it
+                await apply.EvaluateAsync("element => element.classList.remove('tw-hidden')");
 
-            await apply.ClickAsync(new() { Force = true });
+            await apply.ClickAsync(new() { Force = true});
 
             await EditAppliedAsync();
         }

src/Cody.VisualStudio.Tests/TestProjects/ConsoleApp/ConsoleApp1/Manager.cs

@@ -6,7 +6,8 @@ public Manager2() { }
 
     public void Print()
     {
-        Console.WriteLine("Hello, World!");
+        var mesage = "Hello, World!";
+        Console.WriteLine(mesage);
 
 
         Console.WriteLine("Bye, World!");