Fix cursor positioning when Console.BufferWidth exceeds Console.WindowWidth

src/Platform/Microsoft.Testing.Platform/Helpers/System/IConsole.cs

@@ -26,6 +26,18 @@ internal interface IConsole
     [UnsupportedOSPlatform("tvos")]
     int BufferWidth { get; }
 
+    [UnsupportedOSPlatform("android")]
+    [UnsupportedOSPlatform("browser")]
+    [UnsupportedOSPlatform("ios")]
+    [UnsupportedOSPlatform("tvos")]
+    int WindowHeight { get; }
+
+    [UnsupportedOSPlatform("android")]
+    [UnsupportedOSPlatform("browser")]
+    [UnsupportedOSPlatform("ios")]
+    [UnsupportedOSPlatform("tvos")]
+    int WindowWidth { get; }
+
     bool IsOutputRedirected { get; }
 
     [UnsupportedOSPlatform("android")]

src/Platform/Microsoft.Testing.Platform/Helpers/System/SystemConsole.cs

@@ -26,6 +26,24 @@ internal sealed class SystemConsole : IConsole
     [UnsupportedOSPlatform("tvos")]
     public int BufferWidth => Console.BufferWidth;
 
+    /// <summary>
+    /// Gets the height of the console window area.
+    /// </summary>
+    [UnsupportedOSPlatform("android")]
+    [UnsupportedOSPlatform("browser")]
+    [UnsupportedOSPlatform("ios")]
+    [UnsupportedOSPlatform("tvos")]
+    public int WindowHeight => Console.WindowHeight;
+
+    /// <summary>
+    /// Gets the width of the console window area.
+    /// </summary>
+    [UnsupportedOSPlatform("android")]
+    [UnsupportedOSPlatform("browser")]
+    [UnsupportedOSPlatform("ios")]
+    [UnsupportedOSPlatform("tvos")]
+    public int WindowWidth => Console.WindowWidth;
+
     /// <summary>
     /// Gets a value indicating whether output has been redirected from the standard output stream.
     /// </summary>

src/Platform/Microsoft.Testing.Platform/OutputDevice/Terminal/AnsiTerminal.cs

@@ -56,12 +56,12 @@ public AnsiTerminal(IConsole console)
     public int Width
         => _console.IsOutputRedirected || OperatingSystem.IsBrowser() || OperatingSystem.IsAndroid() || OperatingSystem.IsIOS() || OperatingSystem.IsTvOS()
             ? int.MaxValue
-            : _console.BufferWidth;
+            : _console.WindowWidth;
 
     public int Height
         => _console.IsOutputRedirected || OperatingSystem.IsBrowser() || OperatingSystem.IsAndroid() || OperatingSystem.IsIOS() || OperatingSystem.IsTvOS()
             ? int.MaxValue
-            : _console.BufferHeight;
+            : _console.WindowHeight;
 
     public void Append(char value)
     {

src/Platform/Microsoft.Testing.Platform/OutputDevice/Terminal/SimpleTerminalBase.cs

@@ -17,12 +17,12 @@ public SimpleTerminal(IConsole console)
     public int Width
         => Console.IsOutputRedirected || OperatingSystem.IsBrowser() || OperatingSystem.IsAndroid() || OperatingSystem.IsIOS() || OperatingSystem.IsTvOS()
             ? int.MaxValue
-            : Console.BufferWidth;
+            : Console.WindowWidth;
 
     public int Height
         => Console.IsOutputRedirected || OperatingSystem.IsBrowser() || OperatingSystem.IsAndroid() || OperatingSystem.IsIOS() || OperatingSystem.IsTvOS()
             ? int.MaxValue
-            : Console.BufferHeight;
+            : Console.WindowHeight;
 
     protected IConsole Console { get; }
 

test/UnitTests/Microsoft.Testing.Platform.UnitTests/OutputDevice/Terminal/TerminalTestReporterTests.cs

@@ -507,6 +507,10 @@
 
         public int BufferWidth => int.MinValue;
 
+        public int WindowHeight => int.MaxValue;
+
+        public int WindowWidth => 120;
+
         public bool IsOutputRedirected => false;
 
         public string Output => _output.ToString();
@@ -809,4 +813,65 @@
         // Assert - should contain information about 2 tests discovered
         Assert.IsTrue(output.Contains('2') || output.Contains("TestMethod1"), "Output should contain information about discovered tests");
     }
+
+    [TestMethod]
+    public void SimpleTerminal_UsesWindowWidthNotBufferWidth()
+    {
+        // Arrange - Create a console where BufferWidth and WindowWidth are different
+        var console = new TestConsoleWithDifferentBufferAndWindowWidth
+        {
+            BufferWidth = 4096,
+            WindowWidth = 120
+        };
+
+        var terminal = new NonAnsiTerminal(console);
+
+        // Assert - Width should use WindowWidth, not BufferWidth
+        Assert.AreEqual(120, terminal.Width);
+    }
+
+    [TestMethod]
+    public void AnsiTerminal_UsesWindowWidthNotBufferWidth()
+    {
+        // Arrange - Create a console where BufferWidth and WindowWidth are different
+        var console = new TestConsoleWithDifferentBufferAndWindowWidth
+        {
+            BufferWidth = 4096,
+            WindowWidth = 120
+        };
+
+        var terminal = new AnsiTerminal(console);
+
+        // Assert - Width should use WindowWidth, not BufferWidth
+        Assert.AreEqual(120, terminal.Width);
+    }
+
+    internal class TestConsoleWithDifferentBufferAndWindowWidth : IConsole
+    {
+        public int BufferHeight { get; set; } = 300;
+
+        public int BufferWidth { get; set; } = 4096;
+
+        public int WindowHeight { get; set; } = 30;
+
+        public int WindowWidth { get; set; } = 120;
+
+        public bool IsOutputRedirected => false;
+
+        public event ConsoleCancelEventHandler? CancelKeyPress = (sender, e) => { };
+
+        public void Clear() => throw new NotImplementedException();
+
+        public ConsoleColor GetForegroundColor() => ConsoleColor.White;
+
+        public void SetForegroundColor(ConsoleColor color) { }
+
+        public void Write(string? value) { }
+
+        public void Write(char value) { }
+
+        public void WriteLine() { }
+
+        public void WriteLine(string? value) { }
+    }
 }