Different types of tests a person goes through in their daily life. Four different types of tests. 1- Study a concept and prove your expertise in school. Needed for progress; 2- Physical test to show mastery of a particular skill set; 3- Tests that are happening all the time e.g. consequences of doing something wrong; 4- A/B testing to understand customer needs/preferences. The Household of the Prophet saww is a combination of these tests.