--- a
+++ b/tests/test_scraper.py
@@ -0,0 +1,61 @@
+import sys
+import os
+import unittest
+from unittest.mock import MagicMock, patch
+
+# Add the project root directory to PYTHONPATH for module imports
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+from src.scraping.scraper import scrape_criteria  # Import the scrape_criteria function
+
+class TestScrapeCriteria(unittest.TestCase):
+    """
+    Unit tests for the scrape_criteria function in the scraper module.
+
+    This class contains test cases to validate the functionality of scraping 
+    inclusion and exclusion criteria from clinical trial webpages.
+    """
+
+    @patch("selenium.webdriver.Chrome")
+    @patch("selenium.webdriver.support.ui.WebDriverWait")
+    def test_scrape_criteria(self, mock_wait, mock_driver):
+        """
+        Test the scrape_criteria function using a mock WebDriver.
+
+        This test simulates the behavior of a Selenium WebDriver to ensure that
+        the scrape_criteria function correctly interacts with the web elements
+        and processes the criteria as expected.
+        """
+        # Create a mock driver instance to simulate browser actions
+        mock_driver_instance = MagicMock()
+        mock_driver.return_value = mock_driver_instance
+        
+        # Simulate the text returned from the inclusion/exclusion and other criteria containers
+        mock_inclusion_element = MagicMock()
+        mock_inclusion_element.text = "Inclusion Criteria: Age > 18\nExclusion Criteria: None"
+        
+        mock_other_element = MagicMock()
+        mock_other_element.text = "Some other criteria"
+        
+        # Simulate the elements that would be returned by WebDriverWait
+        mock_wait.return_value.until.side_effect = [mock_inclusion_element, mock_other_element]
+        
+        # Call the scrape_criteria function with a test URL and mocked driver
+        scrape_criteria(mock_driver_instance, "https://clinicaltrials.gov/ct2/show/NCT12345678", "NCT12345678", "Test Study")
+        
+        # Assertions to verify correct function behavior
+        mock_driver_instance.get.assert_called_with("https://clinicaltrials.gov/ct2/show/NCT12345678#participation-criteria")
+        mock_driver_instance.maximize_window.assert_called_once()  # Check if maximize_window was called
+        
+        # Construct the expected file path for the output
+        expected_file_path = os.path.join("/Users/bharathbeeravelly/Desktop/patient-trials-matching/data/raw/scraped", "NCT12345678_criteria.txt")
+        
+        # Check if the expected output file exists (skip actual content check for now)
+        self.assertTrue(os.path.exists(expected_file_path))
+
+        # Clean up after test by removing the created file
+        if os.path.exists(expected_file_path):
+            os.remove(expected_file_path)
+
+# Entry point for running the unit tests
+if __name__ == "__main__":
+    unittest.main()