Parametrized tests with a decorator

Runs all tests with both trie constructors now, when adding a new test,
use the same decorator and it will run the test func twice

test.py

@@ -4,30 +4,38 @@
 from py_trie import PyTrie
 
 
-def test_find_added():
-    tr = cTrie()
+constructors = [cTrie, PyTrie]
+
+
+@pytest.mark.parametrize("constructor", constructors)
+def test_find_added(constructor):
+    tr = constructor()
     tr.add("bob")
     assert tr.find("bob") == 1
 
 
-def test_find_incomplete():
-    tr = cTrie()
+@pytest.mark.parametrize("constructor", constructors)
+def test_find_incomplete(constructor):
+    tr = constructor()
     tr.add("boban")
     assert tr.find("bob") == 0
 
 
-def test_find_missing_missing_letter_before():
-    tr = cTrie()
+@pytest.mark.parametrize("constructor", constructors)
+def test_find_missing_missing_letter_before(constructor):
+    tr = constructor()
     tr.add("bob")
     assert tr.find("alice") == 0
 
 
-def test_find_missing_letters_exist_after():
-    tr = cTrie()
+@pytest.mark.parametrize("constructor", constructors)
+def test_find_missing_letters_exist_after(constructor):
+    tr = constructor()
     tr.add("bob")
     assert tr.find("zlice") == 0
 
 
-def test_find_missing_before_add():
-    tr = cTrie()
+@pytest.mark.parametrize("constructor", constructors)
+def test_find_missing_before_add(constructor):
+    tr = constructor()
     assert tr.find("me") == 0