ros2-assignments/doc/tests/ConfigManager.md

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.

Test Cases

1. ConstructorTest

Description: Verifies that ConfigManager can be created with a ROS2 logger without crashing.

• Test Action: Create ConfigManager instance with ROS2 logger
• Expected Result: Instance created successfully without exceptions

2. LoadValidConfigTest

Description: Tests loading of valid TOML configuration files with proper parsing.

• Test Action:
  • Create temporary TOML file with valid configuration
  • Call load_config() with file path
• Expected Result:
  • Returns true
  • is_loaded() returns true

3. LoadInvalidFileTest

Description: Tests error handling when attempting to load non-existent configuration files.

• Test Action: Call load_config() with non-existent file path
• Expected Result:
  • Returns false
  • is_loaded() returns false

4. DatabaseConfigParsingTest

Description: Tests complete database configuration parsing with all parameters.

• Test Configuration:

  [database]
  host = "test_host"
  port = 1234
  dbname = "test_db"
  user = "test_user"
  password = "test_password"
  timeout = 60
  ssl = true
  
  [database.pool]
  min_connections = 2
  max_connections = 20
  

• Expected Result: All configuration values parsed correctly with proper types

5. DatabaseConfigWithoutPoolTest

Description: Tests default values when optional pool section is missing from configuration.

• Test Configuration:

  [database]
  host = "localhost"
  port = 5432
  dbname = "grades"
  user = "postgres"
  password = "postgres"
  

• Expected Result:
  • Main database config parsed correctly
  • Default pool values: min_connections = 1, max_connections = 10

6. GetConfigWithoutLoadingTest

Description: Tests behavior when attempting to access configuration before loading any file.

• Test Action: Call get_database_config() without loading configuration
• Expected Result:
  • Returns std::nullopt
  • is_loaded() returns false