Update pythainlp.translate test

Author: wannaphong

tests/test_translate.py

@@ -9,14 +9,14 @@ class TestTranslatePackage(unittest.TestCase):
     def test_translate(self):
         self.translate = Translate()
         self.assertIsNotNone(
-            self.translate(
+            self.translate.translate(
                 "แมวกินปลา",
                 source="th",
                 target="en"
             )
         )
         self.assertIsNotNone(
-            self.translate(
+            self.translate.translate(
                 "the cat eats fish.",
                 source="en",
                 target="th"