feat(tstest): Enhance tstest with fluent API, suite grouping, tag filtering, fixture & snapshot testing, and parallel execution improvements

ts/tstest.classes.testdirectory.ts

@@ -99,4 +99,43 @@ export class TestDirectory {
     }
     return testFilePaths;
   }
+
+  /**
+   * Get test files organized by parallel execution groups
+   * @returns An object with grouped tests
+   */
+  async getTestFileGroups(): Promise<{
+    serial: string[];
+    parallelGroups: { [groupName: string]: string[] };
+  }> {
+    await this._init();
+    
+    const result = {
+      serial: [] as string[],
+      parallelGroups: {} as { [groupName: string]: string[] }
+    };
+    
+    for (const testFile of this.testfileArray) {
+      const filePath = testFile.path;
+      const fileName = plugins.path.basename(filePath);
+      
+      // Check if file has parallel group pattern
+      const parallelMatch = fileName.match(/\.para__(\d+)\./);
+      
+      if (parallelMatch) {
+        const groupNumber = parallelMatch[1];
+        const groupName = `para__${groupNumber}`;
+        
+        if (!result.parallelGroups[groupName]) {
+          result.parallelGroups[groupName] = [];
+        }
+        result.parallelGroups[groupName].push(filePath);
+      } else {
+        // File runs serially
+        result.serial.push(filePath);
+      }
+    }
+    
+    return result;
+  }
 }