Test all permutations of the input stream

UnitTests/ConsoleDrivers/AnsiResponseParserTests.cs

@@ -1,5 +1,10 @@
-namespace UnitTests.ConsoleDrivers;
-public class AnsiResponseParserTests
+using System.Diagnostics;
+using System.Text;
+using Microsoft.VisualStudio.TestPlatform.Utilities;
+using Xunit.Abstractions;
+
+namespace UnitTests.ConsoleDrivers;
+public class AnsiResponseParserTests (ITestOutputHelper output)
 {
     AnsiResponseParser _parser = new AnsiResponseParser ();
 
@@ -48,6 +53,80 @@ public class AnsiResponseParserTests
         Assert.Equal ("\u001b[0c", response);
     }
 
+
+
+    [Theory]
+    [InlineData ("\x1B[<0;10;20MHello\x1B[0c", "c", "\u001b[0c", "\x1B[<0;10;20MHello")]
+    [InlineData ("\x1B[<1;15;25MWorld\x1B[1c", "c", "\u001b[1c", "\x1B[<1;15;25MWorld")]
+    // Add more test cases here...
+    public void TestInputSequences (string ansiStream, string expectedTerminator, string expectedResponse, string expectedOutput)
+    {
+        var swGenBatches = Stopwatch.StartNew ();
+        int tests = 0;
+
+        var permutations = GetBatchPermutations (ansiStream).ToArray ();
+
+        swGenBatches.Stop ();
+        var swRunTest = Stopwatch.StartNew ();
+
+        foreach (var batchSet in permutations)
+        {
+            string? response = null;
+
+            // Register the expected response with the given terminator
+            _parser.ExpectResponse (expectedTerminator, s => response = s);
+
+            // Process the input
+            StringBuilder actualOutput = new StringBuilder ();
+
+            foreach (var batch in batchSet)
+            {
+                actualOutput.Append (_parser.ProcessInput (batch));
+            }
+
+            // Assert the final output minus the expected response
+            Assert.Equal (expectedOutput, actualOutput.ToString());
+            Assert.Equal (expectedResponse, response);
+            tests++;
+        }
+
+        output.WriteLine ($"Tested {tests} in {swRunTest.ElapsedMilliseconds} ms (gen batches took {swGenBatches.ElapsedMilliseconds} ms)" );
+    }
+
+    public static IEnumerable<string []> GetBatchPermutations (string input)
+    {
+        // Call the recursive method to generate batches
+        return GenerateBatches (input, 0);
+    }
+
+    private static IEnumerable<string []> GenerateBatches (string input, int start)
+    {
+        // If we have reached the end of the string, return an empty list
+        if (start >= input.Length)
+        {
+            yield return new string [0];
+            yield break;
+        }
+
+        // Iterate over the input string to create batches
+        for (int i = start + 1; i <= input.Length; i++)
+        {
+            // Take a batch from 'start' to 'i'
+            string batch = input.Substring (start, i - start);
+
+            // Recursively get batches from the remaining substring
+            foreach (var remainingBatches in GenerateBatches (input, i))
+            {
+                // Combine the current batch with the remaining batches
+                var result = new string [1 + remainingBatches.Length];
+                result [0] = batch;
+                Array.Copy (remainingBatches, 0, result, 1, remainingBatches.Length);
+                yield return result;
+            }
+        }
+    }
+
+
     private void AssertIgnored (string ansiStream,char expected, ref int i)
     {
         var c = NextChar (ansiStream, ref i);