Merge branch 'add-sandbox-tests' into 'master'

Add sandbox tests

See merge request pastebin.run/server!94

.gitlab-ci.yml

@@ -31,6 +31,8 @@ test:stable: &test
   stage: test
   services:
   - postgres
+  - name: registry.gitlab.com/pastebin.run/sandbox/master
+    alias: sandbox
   variables:
     POSTGRES_DB: db
     POSTGRES_USER: user
@@ -38,7 +40,7 @@ test:stable: &test
   image: rust:latest
   script:
   - *init
-  - DATABASE_URL=postgresql://user:password@postgres/db cargo test --verbose --features=database_tests
+  - DATABASE_URL=postgresql://user:password@postgres/db SANDBOX_URL=http://sandbox:8888 cargo test --verbose --features=database_tests,sandbox_tests
   - *clean_cargo
   cache:
     key: ${CI_JOB_NAME}