# Getting Started

This codebase is intentionally small, so the fastest way to get oriented is to start with the main source and then compare it with the test examples. The project appears to center on a simple `OrderService` class, with several files that demonstrate different test styles and a few examples that intentionally live in unusual locations.

## What This Project Does

At a high level, this repository is a small Java example project focused on an `OrderService` and related test fixtures. The files suggest it is used to exercise or demonstrate test discovery, class naming, and annotation patterns across `src/main`, `src/test`, and standalone source locations.

## Recommended Reading Order

1. [`src/main/java/com/example/OrderService.java`](src/main/java/com/example/OrderService.java) — start here to understand the primary application class.
2. [`src/test/java/com/example/OrderServiceTest.java`](src/test/java/com/example/OrderServiceTest.java) — read the canonical test case next.
3. [`src/main/java/com/example/LegacyTest.java`](src/main/java/com/example/LegacyTest.java) and [`src/main/java/com/example/TestNGTest.java`](src/main/java/com/example/TestNGTest.java) — compare older and alternate test styles.
4. [`src/main/java/com/example/RogueTestAnnotated.java`](src/main/java/com/example/RogueTestAnnotated.java), [`src/test/java/com/example/UnannotatedInTest.java`](src/test/java/com/example/UnannotatedInTest.java), and [`src/utils/ImportOnlyTest.java`](src/utils/ImportOnlyTest.java) — review these to understand edge cases and file-placement conventions.

If you are unsure where behavior lives, always trace from `OrderService` outward into the tests that mention it.

## Key Entry Points

The main files to understand first are:

- [`OrderService`](src/main/java/com/example/OrderService.java) — the primary class in the codebase.
- [`OrderServiceTest`](src/test/java/com/example/OrderServiceTest.java) — the expected test counterpart.
- [`LegacyTest`](src/main/java/com/example/LegacyTest.java) — shows a JUnit 3-style inheritance pattern.
- [`TestNGTest`](src/main/java/com/example/TestNGTest.java) — shows a TestNG-based test pattern.
- [`RogueTestAnnotated`](src/main/java/com/example/RogueTestAnnotated.java) — shows a JUnit annotation in an unusual location.
- [`TestHelper`](src/main/java/com/example/TestHelper.java) — a utility-style class that does not appear to be a test.

## Project Structure

The repository is organized around a standard Java layout plus a few extra examples:

- `src/main/java/` — production code and some intentionally test-like classes.
- `src/test/java/` — normal test sources.
- `src/utils/` — supporting or out-of-band example files.
- `standalone/` — a standalone test file outside the usual Maven/Gradle source roots.

This structure suggests the codebase is meant to show how tooling treats classes based on both their names and their location on disk.

## Configuration

No build files were surfaced in the initial scan, so there is no confirmed project configuration file to inspect yet. In a typical Java project, the next files to look for are:

- `pom.xml` — Maven dependencies and test configuration.
- `build.gradle` or `build.gradle.kts` — Gradle build and test setup.
- `.gitignore` — generated files and local build outputs.

If one of those files exists, read it early because it defines the source roots, test framework dependencies, and test execution rules.

## Common Patterns

A few patterns show up repeatedly in this repository:

- **Small, single-purpose classes** — most files contain a minimal class definition.
- **Mixed test frameworks** — examples include JUnit 3 (`extends TestCase`), JUnit 4 (`@org.junit.Test`), and TestNG (`@org.testng.annotations.Test`).
- **Location matters** — some files are in `src/test/java`, while others with test-like names live in `src/main/java` or `src/utils`.
- **Intentional edge cases** — files such as [`ImportOnlyTest`](src/utils/ImportOnlyTest.java) and [`RogueTestAnnotated`](src/main/java/com/example/RogueTestAnnotated.java) look designed to test discovery logic rather than implement business features.

## Practical Starting Path

If you have only 10 minutes, read these in order:

1. [`src/main/java/com/example/OrderService.java`](src/main/java/com/example/OrderService.java)
2. [`src/test/java/com/example/OrderServiceTest.java`](src/test/java/com/example/OrderServiceTest.java)
3. [`src/main/java/com/example/LegacyTest.java`](src/main/java/com/example/LegacyTest.java)
4. [`src/main/java/com/example/TestNGTest.java`](src/main/java/com/example/TestNGTest.java)
5. [`src/main/java/com/example/RogueTestAnnotated.java`](src/main/java/com/example/RogueTestAnnotated.java)

That path will give you the fastest mental model for how the codebase is structured and what kinds of files it contains.