added outline of tests

tests/skin_detector/test_unit.py

-import unittest
+import cv2
+import numpy
 
 
-class BasicTestSuite(unittest.TestCase):
-    def test_dummy(self):
+def test_get_hsv_mask():
+    img = cv2.imread("../test_image.png")
     assert True
 
 
-if __name__ == '__main__':
-    unittest.main()
+def test_get_rgb_mask():
+    img = cv2.imread("../test_image.png")
+    assert True
+
+
+def test_get_ycrcb_mask():
+    img = cv2.imread("../test_image.png")
+    assert True
+
+def test_grab_cut_mask():
+    img = cv2.imread("../test_image.png")
+    assert True
+
+def test_closing():
+    img = cv2.imread("../test_image.png")
+    assert True
+
+def test_process():
+    img = cv2.imread("../test_image.png")
+    assert True
\ No newline at end of file