docs: Update test documentation

- Changed directories to TNC (Tilmann Naming Convention)
- Updated `DatabaseManager` with new IMU methods
- Added `IMUDatabaseWriter` test documentation

doc/tests/ConfigManager.md

@@ -1,6 +1,6 @@
 # Config Manager Unit Tests
 
-Unit tests for `ConfigManager` are implemented in `src/g2_2025_grade_calculator_pkg/test/ConfigManager.test.cpp` using Google Test and ROS2 test utilities. The tests use temporary TOML files to validate configuration loading and parsing functionality.
+Unit tests for `ConfigManager` are implemented in `src/g2_2025_imu_reader_pkg/test/ConfigManager.test.cpp` using Google Test and ROS2 test utilities. The tests use temporary TOML files to validate configuration loading and parsing functionality.
 
 ## Test Cases
 

doc/tests/DatabaseManager.md

@@ -1,6 +1,6 @@
 # Database Manager Unit Tests
 
-Unit tests for `DatabaseManager` are implemented in `src/g2_2025_grade_calculator_pkg/test/DatabaseManager.test.cpp` using Google Test and ROS2 test utilities. The tests are designed to work reliably whether a database connection is available or not, focusing on error handling and method behavior validation.
+Unit tests for `DatabaseManager` are implemented in `src/g2_2025_imu_reader_pkg/test/DatabaseManager.test.cpp` using Google Test and ROS2 test utilities. The tests are designed to work reliably whether a database connection is available or not, focusing on error handling and method behavior validation.
 
 ## Test Cases
 
@@ -22,42 +22,12 @@ Unit tests for `DatabaseManager` are implemented in `src/g2_2025_grade_calculato
 
 **Description:** Verifies retrieval of pending student-course combinations that need exam results.
 
-- **Test Action:** Call `queue_pending_combinations()`
-- **Expected Result:** Returns valid vector (empty if no database connection, populated if connected)
+- Test action: Call `store_imu_data(linear_x, linear_y, linear_z, ang_x, ang_y, ang_z)` without an active DB connection.
+- Expected result: Returns `false` and does not throw — method must check connection status before DB operations.
 
-### 4. StoreExamResultTest
+### 4. CreateTablesNoCrash
 
-**Description:** Tests exam result storage with graceful handling of connection states.
+Description: Verifies calling `create_tables()` without an active connection is safe.
 
-- **Test Action:**
-  - Student: `"TestStudent"`
-  - Course: `"TestCourse"`
-  - Grade: `85`
-- **Expected Result:** Returns `false` if no connection, `true` if connected and successful
-
-### 5. EnrollStudentTest
-
-**Description:** Tests student enrollment into courses.
-
-- **Test Action:**
-  - StudentCourse object with test data
-- **Expected Result:** Returns `false` if no connection, `true` if connected and successful
-
-### 6. GetFinalGradeTest
-
-**Description:** Tests final grade retrieval for non-existent student-course combinations.
-
-- **Test Action:**
-  - Student: `"NonExistentStudent"`
-  - Course: `"NonExistentCourse"`
-- **Expected Result:** Returns `-1` (no results found or no connection)
-
-### 7. StoreFinalResultTest
-
-**Description:** Tests storing calculated final course results.
-
-- **Test Action:**
-  - StudentCourse object
-  - Exam count: `3`
-  - Final grade: `75`
-- **Expected Result:** Returns `false` if no connection, `true` if connected and successful
+- Test action: Call `create_tables()` on a manager that is not connected.
+- Expected result: No exception thrown; the function should be a no-op when no DB connection exists.

doc/tests/IMUDatabaseWriter.md

@@ -0,0 +1,18 @@
+# IMU Database Writer Unit Tests
+
+Unit tests for `IMUDatabaseWriter` are implemented in `src/g2_2025_imu_reader_pkg/test/IMUDatabaseWriter.test.cpp` using Google Test and ROS2 test utilities. These tests validate that the node subscribes to the `imu_data` topic, receives IMU messages, and forwards parsed values to the `DatabaseManager` interface. Tests use dependency injection with a mock `DatabaseManager` to avoid requiring a real database connection.
+
+## Test Cases
+
+### 1. ConstructorTest
+
+**Description:** Verifies that `IMUDatabaseWriter` can be constructed.
+
+- **Test Action:** Create `IMUDatabaseWriter` node with a `MockDatabaseManager`
+- **Expected Result:** Node instance created successfully without exceptions
+
+### 2. ReceivesAndForwardsIMU
+
+**Description:** Tests that the node receives IMU messages on the `imu_data` topic and calls `store_imu_data(...)` on the injected database manager.
+
+- **Expected Result:** Mock's `called_` flag is set to `true`, confirming the node forwarded the IMU data to the database manager