more test bodies

src/tests/test_conversion/tests_db/test_to_lin.py

+import unittest
+from pathlib import Path
+
+from openqlab.conversion.db import to_lin
+
+
+class TestGwinstek(unittest.TestCase):
+    def test_positive_integer(self):
+        pass
+
+    def test_negative_integer(self):
+        pass
+
+    def test_positiv_float(self):
+        pass
+
+    def test_negative_float(self):
+        pass
+
+    def test_dataframe(self):
+        pass
+
+    def test_numpy_array(self):
+        pass

src/tests/test_conversion/tests_db/tests_db.py

+import unittest
+from pathlib import Path
+
+from openqlab.conversion.db import to_lin
+
+
+class TestGwinstek(unittest.TestCase):
+    def test_to_lin(self):
+        pass
+
+    def test_from_lin(self):
+        pass