Implement Unit Tests

- Adds tests folder under 'modules'.
- Creates test files for modules.
- Implements checker passing test cases.

See Issue: MikeMeliz#16

modules/tests/test_checker.py

@@ -0,0 +1,69 @@
+import os.path
+import unittest
+
+from ..checker import extract_domain
+from ..checker import folder
+from ..checker import url_canon
+
+
+class TestCheckFunctions(unittest.TestCase):
+    @classmethod
+    def setUp(cls) -> None:
+        pass
+
+    @classmethod
+    def tearDownClass(cls):
+        """ Test Suite Teardown. """
+        # Remove test folder.
+        os.rmdir('torcrawl')
+
+    def test_url_canon_001(self):
+        """ url_canon unit test.
+        Returns true if the function successfully performs URL normalisation.
+        """
+        url = 'torcrawl.com'
+        expected = 'http://www.torcrawl.com'
+        result = url_canon(url, False)
+        self.assertEqual(expected, result,
+                         f'Test Fail:: expected = {expected}, got {result}')
+
+    def test_url_canon_002(self):
+        """ url_canon unit test.
+        Returns true if the function successfully performs URL normalisation.
+        """
+        url = 'www.torcrawl.com'
+        expected = 'http://www.torcrawl.com'
+        result = url_canon(url, False)
+        self.assertEqual(expected, result,
+                         f'Test Fail:: expected = {expected}, got {result}')
+
+    def test_extract_domain_001(self):
+        """ extract_domain test.
+         Returns true if correct domain is returned.
+        """
+        url = 'http://www.torcrawl.com/test/domain-extract/api?id=001'
+        expected = 'www.torcrawl.com'
+        result = extract_domain(url, True)
+        self.assertEqual(expected, result,
+                         f'Test Fail:: expected = {expected}, got {result}')
+
+    def test_extract_domain_002(self):
+        """ extract_domain test.
+         Returns true if correct domain is returned.
+        """
+        url = 'http://www.torcrawl.com/test/domain-extract/api?id=002'
+        expected = 'http://www.torcrawl.com'
+        result = extract_domain(url, False)
+        self.assertEqual(expected, result,
+                         f'Test Fail:: expected = {expected}, got {result}')
+
+    def test_folder_creation(self):
+        """ folder creation test.
+         Returns true if folder is successfully created.
+        """
+        _input = 'torcrawl'
+        result = folder(_input, False)
+        self.assertTrue(os.path.exists(result),
+                        f'Test Fail:: could not find folder {_input}')
+
+