fixed code creation date

Author: rxdu

TODO.md

@@ -38,6 +38,7 @@
 - **Documentation updates** - Aligned exception documentation with actual implementation
 - **Template parameter optimization** - Removed redundant template parameters in DFS::Search calls
 - **Test robustness improvements** - Enhanced exception safety tests to be implementation-independent
+- **Header date standardization** - Replaced placeholder `[Current Date]` with actual date in test files
 
 ---
 

tests/unit_test/edge_independent_test.cpp

@@ -1,7 +1,7 @@
 /*
  * edge_independent_test.cpp
  *
- * Created on: [Current Date]
+ * Created on: Aug 2025
  * Description: Tests for independent Edge class after refactoring
  *
  * Copyright (c) 2021 Ruixiang Du (rdu)

tests/unit_test/error_condition_test.cpp

@@ -1,7 +1,7 @@
 /*
  * error_condition_test.cpp
  *
- * Created on: [Current Date]
+ * Created on: Aug 2025
  * Description: Tests for error conditions and edge cases
  *
  * Copyright (c) 2021 Ruixiang Du (rdu)

tests/unit_test/vertex_independent_test.cpp

@@ -1,7 +1,7 @@
 /*
  * vertex_independent_test.cpp
  *
- * Created on: [Current Date]
+ * Created on: Aug 2025
  * Description: Tests for independent Vertex class after refactoring
  *
  * Copyright (c) 2021 Ruixiang Du (rdu)