Improve dictionary tests.

test_dictionary.py

@@ -7,8 +7,28 @@ import dictionary
 
 class TestDictionary(unittest.TestCase):
     def test_empty(self):
+        """Verify we can get the default words."""
         words = dictionary.words()
 
+    def test_expected(self):
+        """Verify we have a few expected words."""
+        words = dictionary.words()
+        self.assertIn("cares", words)
+        self.assertIn("fudge", words)
+
+    def test_unexpected(self):
+        """Verify we have a few expected words."""
+        words = dictionary.words()
+        self.assertNotIn("doray", words)
+        self.assertNotIn("xxxxx", words)
+
+    def test_size(self):
+        """Verify all words are the expected length."""
+        words = dictionary.words()
+
+        for word in words:
+            self.assertEqual(len(word), dictionary.WORDLE_LENGTH)
+
 
 if __name__ == "__main__":
     unittest.main()