super unit test

tests/test_banana.py

@@ -2,13 +2,41 @@
 
 """Tests for `banana` package."""
 
-import pytest
+from banana import banana2dec, dec2banana
+
+known_conversions = {
+    "ba": 0,
+    "baba": 0,
+    "be": 1,
+    "beba": 70,
+    "zu": 69,
+    "bezu": 139,
+    "nana": 2485,
+    "banana": 2485,
+}
 
 
-from banana import bananalib
+def test_banana_to_dec_known():
+    for word, value in known_conversions.items():
+        assert banana2dec(word) == value
+
+
+def test_banana2dec_prefix_ba():
+    """un ba all'inizio non cambia nulla!"""
+    for word in known_conversions:
+        value = banana2dec(word)
+        for prefix in ("ba", "baba", "bababa"):
+            assert banana2dec(prefix + word) == value
+
+
+def test_dec_to_banana_known():
+    for word, value in known_conversions.items():
+        if word.startswith("ba"):
+            continue
+        assert dec2banana(value) == word
 
 
 def test_answer_to_life_the_universe_and_everything():
-    banana = bananalib.banana2dec("banana")
+    banana = banana2dec("banana")
     assert banana != 42
     assert banana == 2485