HW3

ReplyTest.java - Unit Tests for Reply Functionality

This test suite validates the reply-related features in a JavaFX-based Q&A application backed by a relational database. The ReplyTest.java file uses JUnit 5 to ensure that creating, reading, updating, and deleting replies associated with answers functions as expected.

Overview

The tests are implemented using the JUnit 5 framework and interact with the database via the DatabaseHelper class. Additional domain classes used include Question and Answer.

Each test prints clear and descriptive output to the console to help trace the test logic and verify that data is being correctly handled.

Test Structure

Test Lifecycle

Each test method follows this structure:

• Setup (@BeforeEach): Connects to the database, adds a test question and a base answer.
• Test Execution: Runs a specific CRUD operation involving replies.
• Teardown (@AfterEach): Deletes all answers for the test question, deletes the test question itself, and closes the database connection.

Create Tests

Method	Purpose
testAddReply_Positive	Adds a valid reply and verifies it was inserted correctly.
testAddReply_Negative_EmptyReply	Attempts to add an empty reply, expecting a SQLException.

Read Tests

Method	Purpose
testGetReplies_Positive_MultipleReplies	Adds two replies and confirms both are retrieved.
testGetReplies_Negative_NoReplies	Ensures that no replies are returned if none were added.

Update Tests

Method	Purpose
testUpdateReply_Positive	Updates an existing reply and verifies the new content.
testUpdateReply_Negative_EmptyContent	Updates a reply to an empty string. Assumes the database allows this and verifies the result.

Delete Tests

Method	Purpose
testDeleteReply_Positive	Adds and then deletes a reply. Verifies it no longer exists.
testDeleteReply_Negative_NonExistent	Attempts to delete a reply that does not exist. Expects no crash or exception, and verifies the state remains unchanged.

Running the Tests

To execute the tests, use your preferred Java IDE (such as IntelliJ IDEA or Eclipse) or run via command line with a build tool like Maven or Gradle that includes JUnit 5 support.

Make sure your database is properly configured and accessible via the DatabaseHelper class before running the tests.

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