UHF-10941: Add test

public/modules/custom/helfi_hakuvahti/templates/hakuvahti-confirmation.html.twig

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+{{ title }}
+{{ message }}

public/modules/custom/helfi_hakuvahti/templates/hakuvahti-form.html.twig

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+{{ title }}
+{{ message }}

public/modules/custom/helfi_hakuvahti/tests/src/Kernel/HakuvahtiControllerTest.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\helfi_hakuvahti\Kernel;
+
+use Drupal\Core\Url;
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\Tests\helfi_api_base\Traits\ApiTestTrait;
+use Drupal\Tests\user\Traits\UserCreationTrait;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\RequestException;
+use GuzzleHttp\Psr7\Request;
+use GuzzleHttp\Psr7\Response;
+use Prophecy\Argument;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\DependencyInjection\Loader\Configurator\Traits\PropertyTrait;
+use Symfony\Component\HttpFoundation\Response as SymfonyResponse;
+
+/**
+ * Tests for hakuvahti controller.
+ */
+class HakuvahtiControllerTest extends KernelTestBase {
+
+  use ApiTestTrait;
+  use UserCreationTrait;
+  use PropertyTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'user',
+    'system',
+    'helfi_hakuvahti',
+  ];
+
+  /**
+   * {@inheritDoc}
+   */
+  public function setUp(): void {
+    parent::setUp();
+
+    $this->setUpCurrentUser(permissions: ['access content']);
+  }
+
+  /**
+   * Tests handleConfirmFormSubmission.
+   */
+  public function testHandleConfirmFormSubmission(): void {
+    $this->container->set(ClientInterface::class, $this->createMockHttpClient([
+      new Response(200, body: 'success'),
+      new Response(404, body: 'not found'),
+      new Response(500, body: 'fail'),
+      new RequestException("womp womp", new Request('POST', 'test')),
+    ]));
+
+    $logger = $this->prophesize(LoggerInterface::class);
+    $this->container->set('logger.channel.helfi_hakuvahti', $logger->reveal());
+
+    // Get request.
+    $response = $this->makeRequest('GET', 'helfi_hakuvahti.confirm', ['hash' => 'a', 'subscription' => 'b']);
+    $this->assertEquals(200, $response->getStatusCode());
+    $this->assertStringContainsString('Confirm saved search', $response->getContent() ?? '');
+
+    // Success.
+    $response = $this->makeRequest('POST', 'helfi_hakuvahti.confirm', ['hash' => 'a', 'subscription' => 'b']);
+    $this->assertEquals(200, $response->getStatusCode());
+    $this->assertStringContainsString('Search saved successfully', $response->getContent() ?? '');
+
+    // Not found.
+    $response = $this->makeRequest('POST', 'helfi_hakuvahti.confirm', ['hash' => 'a', 'subscription' => 'b']);
+    $this->assertEquals(200, $response->getStatusCode());
+    $this->assertStringContainsString('Confirmation failed', $response->getContent() ?? '');
+
+    // Server error.
+    $response = $this->makeRequest('POST', 'helfi_hakuvahti.confirm', ['hash' => 'a', 'subscription' => 'b']);
+    $this->assertEquals(200, $response->getStatusCode());
+    $this->assertStringContainsString('Confirmation failed', $response->getContent() ?? '');
+
+    // Guzzle exception.
+    $response = $this->makeRequest('POST', 'helfi_hakuvahti.confirm', ['hash' => 'a', 'subscription' => 'b']);
+    $this->assertEquals(200, $response->getStatusCode());
+    $this->assertStringContainsString('Confirmation failed', $response->getContent() ?? '');
+  }
+
+  /**
+   * Process a request.
+   *
+   * @param string $method
+   *   HTTP method.
+   * @param string $route
+   *   Drupal route.
+   * @param array $query
+   *   Query parameters.
+   *
+   * @return \Symfony\Component\HttpFoundation\Response
+   *   Controller response.
+   */
+  private function makeRequest(string $method, string $route, array $query = []): SymfonyResponse {
+    $url = Url::fromRoute($route, options: [
+      'query' => $query,
+    ]);
+
+    $request = $this->getMockedRequest($url->toString(), $method);
+
+    return $this->processRequest($request);
+  }
+
+}