[mod] checker: add some additional tests

BTW: fix indentation by 2 spaces

The additional tests has been commented out in the google engines to not release
any CAPTCHA issues.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/settings.yml

@@ -117,6 +117,7 @@ checker:
     #    every: [86400, 90000]  # how often the checker runs
 
     # additional tests: only for the YAML anchors (see the engines section)
+
     additional_tests:
       rosebud: &test_rosebud
         matrix:
@@ -127,6 +128,17 @@ checker:
           - ['one_title_contains', 'citizen kane']
         test:
           - unique_results
+
+      android: &test_android
+        matrix:
+          query: ['android']
+          lang: ['en', 'de', 'fr', 'zh-CN']
+        result_container:
+          - not_empty
+          - ['one_title_contains', 'google']
+        test:
+          - unique_results
+
     # tests: only for the YAML anchors (see the engines section)
     tests:
       infobox: &tests_infobox
@@ -480,18 +492,32 @@ engines:
   - name : google
     engine : google
     shortcut : go
+    # additional_tests:
+    #   android: *test_android
 
   - name : google images
     engine : google_images
     shortcut : goi
+    # additional_tests:
+    #   android: *test_android
+    #   dali:
+    #     matrix:
+    #       query: ['Dali Christ']
+    #       lang: ['en', 'de', 'fr', 'zh-CN']
+    #     result_container:
+    #       - ['one_title_contains', 'Salvador']
 
   - name : google news
     engine : google_news
     shortcut : gon
+    # additional_tests:
+    #   android: *test_android
 
   - name : google videos
     engine : google_videos
     shortcut : gov
+    # additional_tests:
+    #   android: *test_android
 
   - name : google scholar
     engine : xpath