Add browser and unit test suite with Pest + Playwright

Add comprehensive test coverage for core site features (content,
navigation, language, FAQ, news, petition, newsletter) using Pest
browser tests and unit tests for custom plugins. Includes test
infrastructure (Containerfile.test, compose.test.yaml), test
documentation, and test files covering petition form logic, CSV
handling, translation, date formatting, rate limiting, and map data
building.

tests/Browser/ContentTest.php

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+<?php
+
+it('about page shows organization history', function () {
+    $this->visit(BASE_URL . '/om-oss')
+        ->assertSee('Vår historie');
+});
+
+it('about page mentions the organization name', function () {
+    $this->visit(BASE_URL . '/om-oss')
+        ->assertSourceHas('Stopp lidelsen');
+});
+
+it('privacy page loads with correct heading', function () {
+    $this->visit(BASE_URL . '/personvern')
+        ->assertSee('Personvernerklæring');
+});
+
+it('contact page loads with content', function () {
+    $this->visit(BASE_URL . '/kontakt')
+        ->assertSourceHas('<main');
+});
+
+it('brochures page loads with intro text', function () {
+    $this->visit(BASE_URL . '/brosjyrer')
+        ->assertSee('Brosjyrer');
+});
+
+it('articles section loads', function () {
+    $this->visit(BASE_URL . '/artikler')
+        ->assertSourceHas('<main');
+});
+
+it('patient info article loads', function () {
+    $this->visit(BASE_URL . '/artikler/pasientinfo')
+        ->assertSee('pasienter');
+});
+
+it('homepage shows goals section heading', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSee('oppnå');
+});
+
+it('homepage shows intro text about the organization', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSee('frivillig');
+});

tests/Browser/FaqTest.php

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+<?php
+
+it('FAQ listing page loads', function () {
+    $this->visit(BASE_URL . '/faq')
+        ->assertSee('Ofte stilte spørsmål');
+});
+
+it('FAQ listing shows question items', function () {
+    $this->visit(BASE_URL . '/faq')
+        ->assertSee('medisinsk cannabis');
+});
+
+it('individual FAQ article loads', function () {
+    $this->visit(BASE_URL . '/faq/Hva-er-MC')
+        ->assertSourceHas('<main');
+});
+
+it('individual FAQ article shows content', function () {
+    $this->visit(BASE_URL . '/faq/Hva-er-MC')
+        ->assertSee('medisinsk cannabis');
+});
+
+it('FAQ article about driving license loads', function () {
+    $this->visit(BASE_URL . '/faq/forerkort')
+        ->assertSourceHas('<main');
+});

tests/Browser/HomepageTest.php

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+<?php
+
+it('loads the Norwegian homepage', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSourceHas('Stopp lidelsen');
+});
+
+it('shows the news section', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSee('Nyheter');
+});
+
+it('shows the petition section', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSee('underskrift');
+});
+
+it('shows the newsletter section', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSee('nyhetsbrev');
+});

tests/Browser/LanguageTest.php

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+<?php
+
+it('serves the Norwegian homepage by default', function () {
+    $this->visit(BASE_URL . '/')
+        ->assertSourceHas('lang="no"');
+});
+
+it('english news section is accessible', function () {
+    $this->visit(BASE_URL . '/en/nyheter')
+        ->assertSourceHas('<main');
+});

tests/Browser/NavigationTest.php

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+<?php
+
+it('navigates to the news section', function () {
+    $this->visit(BASE_URL . '/nyheter')
+        ->assertSee('Nyheter');
+});
+
+it('navigates to the FAQ section', function () {
+    $this->visit(BASE_URL . '/faq')
+        ->assertSourceHas('<main');
+});
+
+it('navigates to the about page', function () {
+    $this->visit(BASE_URL . '/om-oss')
+        ->assertSourceHas('<main');
+});
+
+it('navigates to the petition page', function () {
+    $this->visit(BASE_URL . '/underskriftskampanje')
+        ->assertSourceHas('<main');
+});
+
+it('navigates to the contact page', function () {
+    $this->visit(BASE_URL . '/kontakt')
+        ->assertSourceHas('<main');
+});
+
+it('navigates to the privacy page', function () {
+    $this->visit(BASE_URL . '/personvern')
+        ->assertSourceHas('<main');
+});

tests/Browser/NewsTest.php

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+<?php
+
+it('news listing page loads', function () {
+    $this->visit(BASE_URL . '/nyheter')
+        ->assertSourceHas('<main');
+});
+
+it('news listing shows article titles', function () {
+    $this->visit(BASE_URL . '/nyheter')
+        ->assertSee('Banebrytende');
+});
+
+it('individual news article loads', function () {
+    $this->visit(BASE_URL . '/nyheter/2025-09-26-banebrytende-studie')
+        ->assertSourceHas('<main');
+});
+
+it('individual news article shows content', function () {
+    $this->visit(BASE_URL . '/nyheter/2025-09-26-banebrytende-studie')
+        ->assertSee('medisinsk cannabis');
+});
+
+it('news article about podcast loads', function () {
+    $this->visit(BASE_URL . '/nyheter/2026-03-08-podcast-paradigmepodden')
+        ->assertSourceHas('<main');
+});
+
+it('returns 404 for non-existent news article', function () {
+    $this->visit(BASE_URL . '/nyheter/finnes-ikke')
+        ->assertSourceHas('404');
+});

tests/Browser/PetitionTest.php

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+<?php
+
+it('loads the petition page with a form', function () {
+    $this->visit(BASE_URL . '/underskriftskampanje/medisinsk-cannabis-pa-resept/')
+        ->assertPresent('input[name="firstname"]');
+});
+
+it('shows required form fields', function () {
+    $this->visit(BASE_URL . '/underskriftskampanje/medisinsk-cannabis-pa-resept/')
+        ->assertPresent('input[name="firstname"]')
+        ->assertPresent('input[name="email"]')
+        ->assertPresent('button[type="submit"]');
+});
+
+it('does not submit empty form', function () {
+    $this->visit(BASE_URL . '/underskriftskampanje/medisinsk-cannabis-pa-resept/')
+        ->press('button[type="submit"]')
+        ->assertPresent('input[name="firstname"]');
+});