say / cardinal number exercise

python/say/say_test.py

@@ -0,0 +1,75 @@
+import unittest
+
+from say import say
+
+
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.2.0
+
+class SayTest(unittest.TestCase):
+    def test_zero(self):
+        self.assertEqual(say(0), "zero")
+
+    def test_one(self):
+        self.assertEqual(say(1), "one")
+
+    def test_fourteen(self):
+        self.assertEqual(say(14), "fourteen")
+
+    def test_twenty(self):
+        self.assertEqual(say(20), "twenty")
+
+    def test_twenty_two(self):
+        self.assertEqual(say(22), "twenty-two")
+
+    def test_one_hundred(self):
+        self.assertEqual(say(100), "one hundred")
+
+    # additional track specific test
+    def test_one_hundred_twenty_three(self):
+        self.assertEqual(say(123), "one hundred and twenty-three")
+
+    def test_one_thousand(self):
+        self.assertEqual(say(1000), "one thousand")
+
+    def test_one_thousand_two_hundred_thirty_four(self):
+        self.assertEqual(say(1234), "one thousand two hundred and thirty-four")
+
+    def test_one_million(self):
+        self.assertEqual(say(1000000), "one million")
+
+    def test_1002345(self):
+        self.assertEqual(
+            say(1002345),
+            "one million two thousand three hundred and forty-five")
+
+    def test_one_billion(self):
+        self.assertEqual(say(1000000000), "one billion")
+
+    def test_987654321123(self):
+        self.assertEqual(
+            say(987654321123), ("nine hundred and eighty-seven billion "
+                                "six hundred and fifty-four million "
+                                "three hundred and twenty-one thousand "
+                                "one hundred and twenty-three"))
+
+    def test_number_too_large(self):
+        with self.assertRaisesWithMessage(ValueError):
+            say(1000000000000)
+
+    def test_number_negative(self):
+        with self.assertRaisesWithMessage(ValueError):
+            say(-1)
+
+    # Utility functions
+    def setUp(self):
+        try:
+            self.assertRaisesRegex
+        except AttributeError:
+            self.assertRaisesRegex = self.assertRaisesRegexp
+
+    def assertRaisesWithMessage(self, exception):
+        return self.assertRaisesRegex(exception, r".+")
+
+
+if __name__ == '__main__':
+    unittest.main()