expectedJSONMap := map[string][]byte{ "9A": []byte(`[{"class":"9A","name":"Ivan"},{"class":"9A","name":"John"}]`), "9B": []byte(`[{"class":"9B","name":"Oleg"},{"class":"9B","name":"Maria"}]`), }

// This is a map where the key is a string and the value is a byte slice ([]byte) // The byte slice contains JSON data representing an array of objects with class and name attributes // Each key corresponds to a different class (9A, 9B) and the value is the JSON data for students in that class

expectedJSONMap := map[string][]byte{ "9A": []byte([{"class":"9A","name":"Ivan"},{"class":"9A","name":"John"}]), "9B": []byte([{"class":"9B","name":"Oleg"},{"class":"9B","name":"Maria"}]), }