add tests

rendercv/data_model.py

@@ -123,6 +123,11 @@ def compute_time_span_string(start_date: Date, end_date: Date) -> str:
     # calculate the number of days between start_date and end_date:
     timespan_in_days = (end_date - start_date).days
 
+    if timespan_in_days < 0:
+        raise ValueError(
+            "The start date is after the end date. Please check the dates!"
+        )
+
     # calculate the number of years between start_date and end_date:
     how_many_years = timespan_in_days // 365
     if how_many_years == 0:

tests/test_rendercv.py

@@ -0,0 +1,60 @@
+import unittest
+from rendercv import data_model, rendering
+
+from datetime import date as Date
+
+
+class TestRendercv(unittest.TestCase):
+    def test_check_spelling(self):
+        sentences = [
+            "This is a sentence.",
+            "This is a sentance with special characters &@#&^@*#&)((!@#_)()).",
+            "12312309 Thisdf sdfsd is a sentence *safds\{\}[[[]]]",
+        ]
+
+        for sentence in sentences:
+            data_model.check_spelling(sentence)
+
+    def test_compute_time_span_string(self):
+        start_date = Date(year=2020, month=1, day=1)
+        end_date = Date(year=2021, month=1, day=1)
+        expected = "1 year 1 month"
+        result = data_model.compute_time_span_string(start_date, end_date)
+        self.assertEqual(result, expected)
+
+        start_date = Date(year=2020, month=1, day=1)
+        end_date = Date(year=2020, month=2, day=1)
+        expected = "1 month"
+        result = data_model.compute_time_span_string(start_date, end_date)
+        self.assertEqual(result, expected)
+
+        start_date = Date(year=2020, month=1, day=1)
+        end_date = Date(year=2023, month=3, day=2)
+        expected = "3 years 2 months"
+        result = data_model.compute_time_span_string(start_date, end_date)
+        self.assertEqual(result, expected)
+
+        start_date = Date(year=2020, month=1, day=1)
+        end_date = Date(year=1982, month=1, day=1)
+        with self.assertRaises(ValueError):
+            data_model.compute_time_span_string(start_date, end_date)
+
+    def test_format_date(self):
+        date = Date(year=2020, month=1, day=1)
+        expected = "Jan. 2020"
+        result = data_model.format_date(date)
+        self.assertEqual(result, expected)
+
+        date = Date(year=1983, month=12, day=1)
+        expected = "Dec. 1983"
+        result = data_model.format_date(date)
+        self.assertEqual(result, expected)
+
+        date = Date(year=2045, month=6, day=1)
+        expected = "June 2045"
+        result = data_model.format_date(date)
+        self.assertEqual(result, expected)
+
+
+if __name__ == "__main__":
+    unittest.main()