MOBILE-4254 behat: Test course contents UI

Author: NoelDeMartin

src/core/features/course/tests/behat/basic_usage.feature

@@ -89,6 +89,10 @@ Feature: Test basic usage of one course in app
     And I should find "Test scorm name" in the app
     And I should find "Test workshop name" in the app
 
+    When I set "page-core-course-index .core-course-thumb" styles to "--course-color" "lightblue"
+    And I set "page-core-course-index .core-course-thumb" styles to "--course-color-tint" "white"
+    Then the UI should match the snapshot
+
     When I press "Choice course 1" in the app
     Then the header should be "Choice course 1" in the app