[mod] move searx/testing.py to the tests directory

move robot tests to tests.robot
manage calls "python -m tests.robot"

tests/robot/settings_robot.yml

@@ -0,0 +1,62 @@
+general:
+  debug: false
+  instance_name: "searx_test"
+
+brand:
+  git_url: https://github.com/searxng/searxng
+  git_branch: master
+  issue_url: https://github.com/searxng/searxng/issues
+  new_issue_url: https://github.com/searxng/searxng/issues/new
+  docs_url: https://searxng.github.io/searxng
+  public_instances: https://searx.space
+  wiki_url: https://github.com/searxng/searxng/wiki
+
+search:
+  language: "all"
+
+server:
+  port: 11111
+  bind_address: 127.0.0.1
+  secret_key: "changedultrasecretkey"
+  base_url: false
+  http_protocol_version: "1.0"
+
+ui:
+  static_path: ""
+  templates_path: ""
+  default_theme: oscar
+
+preferences:
+  lock: []
+
+outgoing:
+  request_timeout: 1.0  # seconds
+  useragent_suffix: ""
+
+engines:
+  - name: general dummy
+    engine: dummy
+    categories: general
+    shortcut: gd
+
+  - name: dummy dummy
+    engine: dummy
+    categories: dummy
+    shortcut: dd
+
+locales:
+  en: English
+  hu: Magyar
+
+doi_resolvers:
+  oadoi.org: 'https://oadoi.org/'
+  doi.org: 'https://doi.org/'
+  doai.io: 'https://dissem.in/'
+  sci-hub.se: 'https://sci-hub.se/'
+  sci-hub.do: 'https://sci-hub.do/'
+  scihubtw.tw: 'https://scihubtw.tw/'
+  sci-hub.st: 'https://sci-hub.st/'
+  sci-hub.bar: 'https://sci-hub.bar/'
+  sci-hub.it.nf: 'https://sci-hub.it.nf/'
+
+default_doi_resolver: 'oadoi.org'