Updating tests: adding cases and todo list

sorts/tests.py

@@ -27,8 +27,19 @@
     {'input': [8, 7, 6, 5, 4, 3, -2, -5], 'expected': [-5, -2, 3, 4, 5, 6, 7, 8]},
     {'input': [-5, -2, 3, 4, 5, 6, 7, 8], 'expected': [-5, -2, 3, 4, 5, 6, 7, 8]},
     {'input': [5, 6, 1, 4, 0, 1, -2, -5, 3, 7], 'expected': [-5, -2, 0, 1, 1, 3, 4, 5, 6, 7]},
+    {'input': [2, -2], 'expected': [-2, 2]},
+    {'input': [1], 'expected': [1]},
+    {'input': [], 'expected': []},
 ]
 
+'''
+    TODO:
+    - Fix some broken tests in particular cases (as [] for example),
+    - Unify the input format: should always be function(input_collection) (no additional args)
+    - Unify the output format: should always be a collection instead of updating input elements
+      and returning None
+    - Rewrite some algorithms in function format (in case there is no function definition)
+'''
 
 TEST_FUNCTIONS = [
     bogo_sort,
@@ -59,4 +70,5 @@
 
 for function in TEST_FUNCTIONS:
     for case in TEST_CASES:
-        assert function(case['input']) == case['expected']
+        result = function(case['input'])
+        assert result  == case['expected'], 'Executed function: {}, {} != {}'.format(function.__name__, result, case['expected'])