Testing
The dagger project leverages a comprehensive suite of tests to ensure code quality and stability.
Unit Tests
Unit tests are designed to verify the functionality of individual components in isolation. These tests focus on testing individual methods or functions, ensuring they behave as expected.
Example:
@Test
public void testConstructor_withNullDependency() {
try {
new MyComponent(null);
fail("Expected IllegalArgumentException to be thrown");
} catch (IllegalArgumentException e) {
// Expected behavior
}
}
Integration Tests
Integration tests are designed to verify the interaction and collaboration between different components. They focus on simulating real-world scenarios and validating the overall system behavior.
Example:
@Test
public void testDatabaseConnection() {
// Setup database connection
// ...
// Perform operations using the database connection
// ...
// Validate the results
// ...
}
End-to-End Tests
End-to-End tests simulate the complete user journey, from the front-end to the back-end and back again, verifying that all components work together as expected.
Example:
@Test
public void testUserRegistration() {
// Perform user registration using the front-end
// ...
// Validate the user is created in the back-end
// ...
}
Debugging
The dagger project leverages various debugging tools and techniques for effective issue identification and resolution.
Debugger
The Java debugger is a powerful tool that allows developers to step through code, inspect variables, and understand the program’s execution flow.
Example:
Setting breakpoints in the code and inspecting the state of variables during runtime.
Logging
Logging provides a mechanism for recording events and messages during the program’s execution. It allows developers to track the program’s flow and identify potential issues.
Example:
logger.info("Starting database connection");
// ...
logger.error("Database connection failed: " + e.getMessage());
Exception Handling
Effective exception handling is crucial for handling unexpected situations and providing informative error messages.
Example:
try {
// ...
} catch (Exception e) {
logger.error("An error occurred: " + e.getMessage());
// ...
}
