fix(mstest): support C# file discovery under test/ directory

The test/ directory pattern was missing from C# test file discovery.
While tests/, Tests/ patterns existed, the singular test/ was missing, causing files under test/IntegrationTests/ in repos like microsoft/testfx to not be detected.

- Add test/ pattern to isCSharpTestFile
- Add test cases

fix #94

Author: kubrickcode

pkg/parser/scanner.go

@@ -809,9 +809,9 @@ func isCSharpTestFile(path string) bool {
 	if strings.Contains(normalizedPath, ".Specs/") || strings.Contains(normalizedPath, ".Spec/") {
 		return true
 	}
-	// "Tests/" as project folder pattern (both capitalized and lowercase)
-	if strings.HasPrefix(normalizedPath, "Tests/") || strings.Contains(normalizedPath, "/Tests/") ||
-		strings.HasPrefix(normalizedPath, "tests/") {
+	// "test/", "tests/", "Tests/" as project folder patterns
+	if strings.HasPrefix(normalizedPath, "test/") || strings.HasPrefix(normalizedPath, "tests/") ||
+		strings.HasPrefix(normalizedPath, "Tests/") || strings.Contains(normalizedPath, "/Tests/") {
 		return true
 	}
 

pkg/parser/scanner_test.go

@@ -18,6 +18,7 @@ import (
 	_ "github.com/specvital/core/pkg/parser/strategies/cargotest"
 	_ "github.com/specvital/core/pkg/parser/strategies/gtest"
 	_ "github.com/specvital/core/pkg/parser/strategies/jest"
+	_ "github.com/specvital/core/pkg/parser/strategies/mstest"
 	_ "github.com/specvital/core/pkg/parser/strategies/phpunit"
 )
 
@@ -1096,3 +1097,55 @@ fn integration_test() {
 		}
 	})
 }
+
+func TestScan_CSharpTestDirectory(t *testing.T) {
+	t.Run("should discover C# files in test/ directory", func(t *testing.T) {
+		tmpDir := t.TempDir()
+
+		// Create test/SomeProject/ directory structure
+		testDir := filepath.Join(tmpDir, "test", "SomeProject")
+		if err := os.MkdirAll(testDir, 0755); err != nil {
+			t.Fatalf("failed to create test dir: %v", err)
+		}
+
+		// Create a C# MSTest file with non-standard naming (like DataRowTests_Regular.cs)
+		testContent := []byte(`using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace SomeProject;
+
+[TestClass]
+public class DataRowTests_Regular
+{
+    [TestMethod]
+    public void Test1() => Assert.IsTrue(true);
+}
+`)
+		testFile := filepath.Join(testDir, "DataRowTests_Regular.cs")
+		if err := os.WriteFile(testFile, testContent, 0644); err != nil {
+			t.Fatalf("failed to write test file: %v", err)
+		}
+
+		src, err := source.NewLocalSource(tmpDir)
+		if err != nil {
+			t.Fatalf("failed to create source: %v", err)
+		}
+		defer src.Close()
+
+		result, err := parser.Scan(context.Background(), src)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+
+		if len(result.Inventory.Files) != 1 {
+			t.Fatalf("expected 1 file, got %d", len(result.Inventory.Files))
+		}
+
+		file := result.Inventory.Files[0]
+		if file.Framework != "mstest" {
+			t.Errorf("expected framework 'mstest', got %q", file.Framework)
+		}
+		if file.Language != "csharp" {
+			t.Errorf("expected language 'csharp', got %q", file.Language)
+		}
+	})
+}

tests/integration/testdata/golden/testfx-v4.0.2.json

@@ -2,10 +2,10 @@
   "repository": "testfx",
   "ref": "v4.0.2",
   "expectedFrameworks": ["mstest"],
-  "fileCount": 264,
-  "testCount": 1668,
+  "fileCount": 320,
+  "testCount": 1813,
   "frameworkCounts": {
-    "mstest": 264
+    "mstest": 320
   },
   "sampleFiles": [
     {
@@ -130,7 +130,7 @@
     }
   ],
   "stats": {
-    "filesMatched": 264,
-    "filesScanned": 509
+    "filesMatched": 320,
+    "filesScanned": 675
   }
 }