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SealShare/.claude/skills/testing-best-practices/rules/security.md
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Andreas Reinhold / reiniandClaude Opus 5 92b3b3de56 Regenerate Boost guidelines and skills
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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017XYnWFt9pJEwvAmNFN38XD
2026-09-10 10:42:22 +02:00

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# Security Tests
Test each security boundary where user input affects authorization, rendered output, or query construction. A defect at such a boundary can be difficult to detect because the feature may continue to work.
Write a test for each of these cases:
- **Cross-tenant access.** Request a record of a different tenant, team, or organization. Read `rules/endpoint-tests.md` for why the response should possibly be `404` rather than `403`.
- **Each unprivileged role.** Use a dataset over the roles that the endpoint must refuse.
- **Escaping user-provided content.** Test escaping in HTML and mail. Include names and every free-text field a template renders. Assert that dangerous characters are escaped and the raw value is absent. Do not assert an exact entity for a quote, because Markdown and mail CSS inliners may decode it.
- **Injection into dynamic query components.** Examples include sort columns, filter fields, and sort directions.
- **An unexpected key** in a payload or configuration array. A merge that accepts every key can set an attribute the user must not control.
```php
it('escapes dangerous content in the notification', function () {
$organization = Organization::factory()->make([
'name' => "O'Reilly <script>alert('xss')</script>",
]);
$content = (new QuotaApproaching($organization, 80))->toMail()->render();
expect($content)
->toContain('&lt;script&gt;')
->not->toContain("<script>alert('xss')</script>");
});
```
Laravel provides defenses against mass assignment, unauthorized access, and unescaped output. Test that the application applies the appropriate defense to each attribute, route, and template.