Add CI step to drone

This moves our content tests to Drone and adds a new
test to make sure the message files are valid json.

Ticket: https://phabricator.wikimedia.org/T254880

.drone.yml

@@ -4,17 +4,22 @@ type: docker
 name: default
 
 trigger:
-  branch:
-    - test
-    - production
   event:
     - push
     - tag
     - rollback
     - promote
 
 steps:
+  - name: ci
+    image: composer
+    commands:
+      - composer install
+      - composer ci
+
   - name: deploy
+    when:
+      branch: [ test, production ]
     image: wikimediade/ansible-deploy
     pull: never # Until we publish the image on docker hub
     environment:

tests/Validation/JsonIsValidTest.php

@@ -0,0 +1,62 @@
+<?php
+
+declare( strict_types=1 );
+
+namespace WMDE\Fundraising\Content\Tests\Validation;
+
+use PHPUnit\Framework\TestCase;
+
+class JsonIsValidTest extends TestCase {
+
+    /**
+     * @dataProvider jsonFileDataProvider
+     */
+    public function testJsonFilesAreValid( string $file ): void {
+        json_decode( $file );
+        $this->assertTrue( json_last_error() === JSON_ERROR_NONE );
+    }
+
+    private function jsonFileDataProvider(): \Generator {
+        yield [ $this->loadFile( 'de_DE/data/contact_categories.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/countries.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/faq.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/pages.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/salutations.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/supporters.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/use_of_funds_content.json' ) ];
+        yield [ $this->loadFile( 'de_DE/data/validation.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/daysOfTheWeek.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/mail.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/membershipTypes.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/messages.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/pageTitles.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/paymentIntervals.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/paymentProvider.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/paymentStatus.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/paymentTypes.json' ) ];
+        yield [ $this->loadFile( 'de_DE/messages/siteMetadata.json' ) ];
+
+        yield [ $this->loadFile( 'en_GB/data/contact_categories.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/countries.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/faq.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/pages.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/salutations.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/supporters.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/use_of_funds_content.json' ) ];
+        yield [ $this->loadFile( 'en_GB/data/validation.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/daysOfTheWeek.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/mail.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/membershipTypes.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/messages.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/pageTitles.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/paymentIntervals.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/paymentProvider.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/paymentStatus.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/paymentTypes.json' ) ];
+        yield [ $this->loadFile( 'en_GB/messages/siteMetadata.json' ) ];
+    }
+
+    private function loadFile( string $path ): string {
+        return file_get_contents( __DIR__ . '/../../i18n/' . $path );
+    }
+}