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

@@ -439,22 +439,22 @@ public void AnsiTerminal_OutputProgressFrameIsCorrect()
               Error output
                 Oh no!
             ␛[m
-            [␛[32m✓1␛[m/␛[31mx0␛[m/␛[33m↓0␛[m] assembly.dll (net8.0|x64)␛[2147483640G(1m 31s)
-              SkippedTest1␛[2147483640G(1m 31s)
-              InProgressTest1␛[2147483640G(1m 31s)
-              InProgressTest2␛[2147483643G(31s)
-              InProgressTest3␛[2147483644G(1s)
+            [␛[32m✓1␛[m/␛[31mx0␛[m/␛[33m↓0␛[m] assembly.dll (net8.0|x64)␛[242G(1m 31s)
+              SkippedTest1␛[242G(1m 31s)
+              InProgressTest1␛[242G(1m 31s)
+              InProgressTest2␛[245G(31s)
+              InProgressTest3␛[246G(1s)
             ␛[7F
             ␛[J␛[33mskipped␛[m SkippedTest1 ␛[90m(10s 000ms)␛[m
             ␛[90m  Standard output
                 Hello!
               Error output
                 Oh no!
             ␛[m
-            [␛[32m✓1␛[m/␛[31mx0␛[m/␛[33m↓1␛[m] assembly.dll (net8.0|x64)␛[2147483640G(1m 31s)
-              InProgressTest1␛[2147483640G(1m 31s)
-              InProgressTest2␛[2147483643G(31s)
-              InProgressTest3␛[2147483644G(1s)
+            [␛[32m✓1␛[m/␛[31mx0␛[m/␛[33m↓1␛[m] assembly.dll (net8.0|x64)␛[242G(1m 31s)
+              InProgressTest1␛[242G(1m 31s)
+              InProgressTest2␛[245G(31s)
+              InProgressTest3␛[246G(1s)
             
             """;
 
@@ -505,7 +505,11 @@ internal class StringBuilderConsole : IConsole
 
         public int BufferHeight => int.MaxValue;
 
-        public int BufferWidth => int.MinValue;
+        public int BufferWidth => int.MaxValue;
+
+        public int WindowHeight => int.MaxValue;
+
+        public int WindowWidth => int.MaxValue;
 
         public bool IsOutputRedirected => false;
 
@@ -809,4 +813,75 @@ public void TerminalTestReporter_WhenInDiscoveryMode_ShouldIncrementDiscoveredTe
         // 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)
+        {
+        }
+    }
 }