[it] Handle string inputs in to_ordinal

Fixes #508.

num2words/lang_IT.py

@@ -146,13 +146,13 @@ def to_cardinal(self, number):
         elif isinstance(number, float):
             string = self.float_to_words(number)
         elif number < 20:
-            string = CARDINAL_WORDS[number]
+            string = CARDINAL_WORDS[int(number)]
         elif number < 100:
-            string = self.tens_to_cardinal(number)
+            string = self.tens_to_cardinal(int(number))
         elif number < 1000:
-            string = self.hundreds_to_cardinal(number)
+            string = self.hundreds_to_cardinal(int(number))
         elif number < 1000000:
-            string = self.thousands_to_cardinal(number)
+            string = self.thousands_to_cardinal(int(number))
         else:
             string = self.big_number_to_cardinal(number)
         return accentuate(string)
@@ -167,9 +167,9 @@ def to_ordinal(self, number):
         elif number % 1 != 0:
             return self.float_to_words(number, ordinal=True)
         elif number < 20:
-            return ORDINAL_WORDS[number]
+            return ORDINAL_WORDS[int(number)]
         elif is_outside_teens and tens % 10 == 3:
-            # Gets ride of the accent      ~~~~~~~~~~
+            # Gets rid of the accent
             return self.to_cardinal(number)[:-1] + "eesimo"
         elif is_outside_teens and tens % 10 == 6:
             return self.to_cardinal(number) + "esimo"

tests/test_it.py

@@ -263,14 +263,37 @@ def test_nth_big(self):
             "cinquecentosessantasettemilaottocentonovantesimo"
         )
 
-    def test_with_decimals(self):
+    def test_with_floats(self):
         self.assertAlmostEqual(
             num2words(1.0, lang="it"), "uno virgola zero"
         )
         self.assertAlmostEqual(
             num2words(1.1, lang="it"), "uno virgola uno"
         )
 
+    def test_with_strings(self):
+        for i in range(2002):
+            # Just make sure it doesn't raise an exception
+            num2words(str(i), lang='it', to='cardinal')
+            num2words(str(i), lang='it', to='ordinal')
+        self.assertEqual(num2words('1', lang="it", to='ordinal'), "primo")
+        self.assertEqual(
+            num2words('100', lang="it", to='ordinal'),
+            "centesimo"
+        )
+        self.assertEqual(
+            num2words('1000', lang="it", to='ordinal'),
+            "millesimo"
+        )
+        self.assertEqual(
+            num2words('1234567890123456789012345678', lang="it", to='ordinal'),
+            "un quadriliardo, duecentotrentaquattro quadrilioni, "
+            "cinquecentosessantasette triliardi, ottocentonovanta trilioni, "
+            "centoventitré biliardi, quattrocentocinquantasei bilioni, "
+            "settecentottantanove miliardi, dodici milioni e "
+            "trecentoquarantacinquemilaseicentosettantottesimo"
+        )
+
     def test_currency_eur(self):
         for test in TEST_CASES_TO_CURRENCY_EUR:
             self.assertEqual(