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Laravel Swarm Installer Testkit

Shared Testbench-based test harness for <vendor>:install* Artisan command test suites. Extracted from builtbyberry/laravel-swarm so companion packages (builtbyberry/laravel-swarm-pulse and others) can require-dev it directly instead of duplicating the harness.

This package is require-dev-only. It requires orchestra/testbench directly (rather than through a consumer's own require-dev) since testing Artisan installer commands is this package's entire purpose.

What you get

InstallerTestCase is the base test case. Extend it via a small package subclass that supplies your service providers:

Then bind it per test file via the standard Pest uses() call:

On setUp() the harness:

1. Spins up an Orchestra Testbench application booting the providers your subclass declares.
2. Materializes a temp directory shaped like a freshly-scaffolded Laravel 13 app — config/, routes/console.php, app/Providers/AppServiceProvider.php, .env, composer.json, plus the usual database/, resources/, storage/, bootstrap/, public/, tests/ directories.
3. Re-points the running application at the scratch skeleton via $this->app->setBasePath(...) so app_path(), config_path(), base_path(), database_path(), etc. all resolve into the fixture.
4. Tears the temp directory down in tearDown(). Each test gets its own uniquely-named skeleton — tests are parallel-safe.

Writing an installer test

Idempotency

Every installer should be safe to re-run. The harness has a one-liner:

twice() runs the installer a second time with the same arguments and returns a DoubleRunResult. assertSecondRunIsNoOp() then verifies:

• the second run exited 0
• no file was created
• no file was deleted
• no file's contents (sha256) changed

If your installer needs to be re-runnable but has a --force flag that intentionally overwrites, test --force separately — assertSecondRunIsNoOp() is only for the default-mode contract.

Refusal paths

Every installer should fail loudly when its preconditions are violated (unsupported driver, already-installed-and-modified, missing --force, etc.). The refusal helper checks both exit code and error message in one call:

Seeding the skeleton

Many installer scenarios need a pre-existing file in the skeleton — "what does the installer do when config/my-package.php already exists?". Use writeSkeletonFile():

skeletonPath() (no args) returns the absolute root, and skeletonPath('relative/path') resolves a relative path inside it.

Helpers reference

InstallerRunResult also exposes:

• assertSucceeded(): self — exit code 0.
• assertExitCode(int $expected): self — exit code matches.
• assertOutputContains(string $needle): self — console output contains fragment.
• twice(): DoubleRunResult — run again, return the pair.
• Public readonly properties: command, arguments, exitCode, output, skeletonSnapshot.

Registering a command that is not part of your package's default commands()

If you are testing an installer that has not yet been wired into your service provider's commands() method, register it manually:

Once the installer ships in your package's default command list, the registerInstallerCommand() call can be deleted.

Overriding the test environment

defineEnvironment() ships a minimal default (in-memory sqlite, array cache) sufficient for installers that only assert on disk state. Override it in your subclass if your installer needs a connection that survives across PDO instances (queue-worker fakes, subprocess assertions) or other package-specific config.

Why this is a separate package

The harness extends Orchestra\Testbench\TestCase, and orchestra/testbench is a heavy testing framework that has no business in a production composer.lock. Shipping the harness inside a runtime package's own src/ would force either promoting testbench to a production require (bloating every consumer's install) or shipping a class with an undeclared dependency. A standalone require-dev-only package sidesteps both.