# Factories and Test Data

## Each Test Makes Its Own Data

Create mutable records inside each test or through a private helper that the test calls. This keeps setup visible and lets each test select its factory state.

Use `setUp()` only for configuration that applies to every test in the class. Do not create records in it, because its objects remain in memory until the suite ends.

## Record Construction

- Use `create()` if the test needs the record in the database.
- Use `make()` only if the test does not need the database. Examples include rendering a notification and testing a value object's behavior.
- Use a named factory state instead of a raw attribute. `User::factory()->unverified()->create()` gives the state meaning; `create(['email_verified_at' => null])` gives only its value.
- Use `for()` or the relationship helper of the project to declare the owner of a record.
- Use `recycle()` if several records must share one parent record.
- Use `sequence()` if several records need different attributes.

```php
$organization = Organization::factory()->onPlan(BillingPlan::PRO)->create();

$environment = Environment::factory()->recycle($organization)->create();

$organizations = Organization::factory()
    ->count(3)
    ->sequence(
        ['created_at' => now()->setSeconds(30)],
        ['created_at' => now()->setSeconds(1)],
    )
    ->create();
```

Create only the records required to arrange the behavior or support an assertion.

## The Data Providers

Use a data provider when the setup, test body, and assertions remain the same across input values.

```php
public static function nonAdminRoles(): array
{
    return collect(Role::cases())
        ->reject(fn (Role $role): bool => $role === Role::ADMIN)
        ->mapWithKeys(fn (Role $role): array => [$role->value => [$role]])
        ->all();
}

#[DataProvider('nonAdminRoles')]
public function test_forbids_roles_other_than_admin(Role $role): void
{
    $this->actingAs(User::factory()->hasOrganization($role)->create())
        ->post('/settings')
        ->assertForbidden();
}
```

Declare each data provider method as `public static`.

Use parameterized tests for:

- the cases of an enum
- the roles and the plans
- the boundary values
- the input values that are not valid in the same way
- the pairs of an input value and an output value

Write separate tests if the cases need a different setup, a different behavior, or different assertions. One test function with a branch in the body is two tests in one function.

Give each data-provider case a key that states the difference. A failure then identifies the case without requiring you to count positions.