# PROJECT_SUMMARY.md

## Testcontainers for Perl 5 — Implementation Summary

This document provides a comprehensive overview of the testcontainers-perl5 implementation.

## Implementation Status

### Core Library — Complete

| Component | Status | Module |
|-----------|--------|--------|
| Main entry point | Done | `Testcontainers` |
| Container wrapper | Done | `Testcontainers::Container` |
| Request builder | Done | `Testcontainers::ContainerRequest` |
| Docker client | Done | `Testcontainers::DockerClient` |
| Labels specification | Done | `Testcontainers::Labels` |

### Wait Strategies — Complete

| Strategy | Status | Module |
|----------|--------|--------|
| TCP port listening | Done | `Testcontainers::Wait::HostPort` |
| HTTP endpoint | Done | `Testcontainers::Wait::HTTP` |
| Log message matching | Done | `Testcontainers::Wait::Log` |
| Docker health check | Done | `Testcontainers::Wait::HealthCheck` |
| Composite (all) | Done | `Testcontainers::Wait::Multi` |
| Base role (polling) | Done | `Testcontainers::Wait::Base` |
| Factory functions | Done | `Testcontainers::Wait` |

### Pre-Built Modules — Complete

| Module | Status | Factory | Features |
|--------|--------|---------|----------|
| PostgreSQL | Done | `postgres_container()` | DSN, connection string |
| MySQL | Done | `mysql_container()` | DSN, connection string |
| Redis | Done | `redis_container()` | Connection string, optional password |
| Nginx | Done | `nginx_container()` | Base URL |

### Container Features — Complete

| Feature | Status |
|---------|--------|
| Port mapping | Done |
| Environment variables | Done |
| Labels (with validation) | Done |
| Command / Entrypoint | Done |
| Tmpfs mounts | Done |
| Privileged mode | Done |
| Network mode | Done |
| Named networks | Done |
| Container exec | Done |
| Container logs | Done |
| Auto-cleanup (DEMOLISH) | Done |

### Build & CI — Complete

| Component | Status |
|-----------|--------|
| Module::Build | Done |
| cpanfile | Done |
| GitHub Actions CI | Done |
| perlcritic linting | Done |

### Vendored Dependencies

| Dependency | Source | Reason |
|------------|--------|--------|
| WWW::Docker | [Getty/p5-www-docker](https://github.com/Getty/p5-www-docker) | Unmaintained upstream |

## File Structure

```
lib/
├── Testcontainers.pm                 # run(), terminate_container()
├── Testcontainers/
│   ├── Container.pm                  # Running container wrapper
│   ├── ContainerRequest.pm           # Config → Docker API
│   ├── DockerClient.pm               # WWW::Docker wrapper
│   ├── Labels.pm                     # org.testcontainers.* labels
│   ├── Wait.pm                       # Strategy factory
│   ├── Wait/
│   │   ├── Base.pm                   # Moo::Role polling loop
│   │   ├── HostPort.pm               # TCP check
│   │   ├── HTTP.pm                   # HTTP check
│   │   ├── Log.pm                    # Log matching
│   │   ├── HealthCheck.pm            # Health check
│   │   └── Multi.pm                  # Composite
│   └── Module/
│       ├── PostgreSQL.pm             # postgres_container()
│       ├── MySQL.pm                  # mysql_container()
│       ├── Redis.pm                  # redis_container()
│       └── Nginx.pm                  # nginx_container()
└── WWW/
    ├── Docker.pm                     # Vendored Docker client
    └── Docker/
        ├── Container.pm
        ├── ContainerExec.pm
        ├── ContainerExecStart.pm
        ├── Image.pm
        ├── Network.pm
        ├── Request.pm
        ├── System.pm
        └── Volume.pm

t/
├── 01-load.t                         # Module loading
├── 02-container-request.t            # Unit tests
├── 03-wait-strategies.t              # Unit tests
├── 04-integration.t                  # Integration (Docker)
├── 05-modules.t                      # Integration (Docker)
├── 06-basic.t                        # WWW::Docker tests
├── 07-system.t
├── 08-version.t
├── 09-containers.t
├── 10-images.t
├── 11-networks.t
├── 12-volumes.t
├── fixtures/
└── lib/
```

## Implementation Statistics

| Metric | Count |
|--------|-------|
| Testcontainers source files | 16 |
| Vendored WWW::Docker files | 9 |
| Test files | 12 |
| Total Testcontainers LOC | ~2,500 |
| Total vendored LOC | ~1,500 |
| Total test LOC | ~1,300 |
| Unit tests | 85+ |
| Wait strategies | 5 (+1 composite) |
| Pre-built modules | 4 |

## API Comparison with Go

| Go Testcontainers | Perl Testcontainers |
|---|---|
| `testcontainers.Run(ctx, req)` | `Testcontainers::run($image, %opts)` |
| `container.Host(ctx)` | `$container->host` |
| `container.MappedPort(ctx, "80/tcp")` | `$container->mapped_port('80/tcp')` |
| `container.Endpoint(ctx, "")` | `$container->endpoint('80/tcp')` |
| `container.Exec(ctx, cmd)` | `$container->exec(\@cmd)` |
| `container.Logs(ctx)` | `$container->logs` |
| `testcontainers.TerminateContainer(c)` | `$container->terminate` |
| `wait.ForListeningPort("80/tcp")` | `Testcontainers::Wait::for_listening_port('80/tcp')` |
| `wait.ForHTTP("/")` | `Testcontainers::Wait::for_http('/')` |
| `wait.ForLog("ready")` | `Testcontainers::Wait::for_log('ready')` |
| `wait.ForHealthCheck()` | `Testcontainers::Wait::for_health_check()` |
| `wait.ForAll(...)` | `Testcontainers::Wait::for_all(...)` |
| `testcontainers.WithEnv(map)` | `env => { ... }` |
| `testcontainers.WithExposedPorts(...)` | `exposed_ports => [...]` |
| `postgres.Run(ctx, ...)` | `postgres_container(...)` |

## Future Enhancements

- **Ryuk resource reaper** — automatic cleanup of orphaned containers
- **Docker Compose** — multi-container orchestration support
- **Volume mounts** — bind mount and named volume helpers
- **File copy** — copy files to/from containers
- **Additional modules** — MongoDB, Kafka, Elasticsearch, RabbitMQ
- **CPAN distribution** — package for CPAN release
- **Container reuse** — persist containers across test runs for speed
