Create test_preprocessing.py

ch08/additional_features/.github/workflows/test_preprocessing.py

@@ -0,0 +1,27 @@
+import unittest
+from preprocessing import *
+
+class TestPreprocessing(unittest.TestCase):
+
+    def test_remove_stopwords(self):
+        text = "this is a sample text that includes some stop words such as the, and, etc."
+        expected_output = "sample text includes stop words like , , etc ."
+        self.assertEqual(remove_stopwords(text), expected_output)
+
+    def test_perform_lemmatization(self):
+        text = "running played plays"
+        expected_output = "running played play"
+        self.assertEqual(perform_lemmatization(text), expected_output)
+
+    def test_perform_stemming(self):
+        text = "running played plays"
+        expected_output = "run play play"
+        self.assertEqual(perform_stemming(text), expected_output)
+
+    def test_preprocess_text(self):
+        text = "This is a sample text. It includes some stop words, and it has words in different tenses (e.g. playing, played)."
+        expected_output = "thi sampl text . includ stop word , word differ tens ( e.g. play , play ) ."
+        self.assertEqual(preprocess_text(text), expected_output)
+
+if __name__ == '__main__':
+    unittest.main()