#150: Add tests for DateHandler

test/icat/test_date_handler.py

@@ -0,0 +1,77 @@
+from datetime import datetime
+
+import pytest
+
+from datagateway_api.common.date_handler import DateHandler
+from datagateway_api.common.exceptions import BadRequestError
+
+
+class TestIsStrADate:
+    def test_valid_date(self):
+        date_output = DateHandler.is_str_a_date("2008-10-15")
+        assert date_output is True
+
+    def test_valid_boundary_date(self):
+        date_output = DateHandler.is_str_a_date("29/2/2020")
+        assert date_output is True
+
+    def test_invalid_boundary_date(self):
+        date_output = DateHandler.is_str_a_date("29/2/2019")
+        # There was no leap year in 2019
+        assert date_output is False
+
+    def test_invalid_date(self):
+        date_output = DateHandler.is_str_a_date("25/25/2020")
+        assert date_output is False
+
+
+class TestStrToDatetime:
+    def test_valid_str(self):
+        datetime_output = DateHandler.str_to_datetime_object("2008-10-15 12:05:09")
+        assert datetime_output == datetime(
+            year=2008, month=10, day=15, hour=12, minute=5, second=9,
+        )
+
+    def test_valid_boundary_str(self):
+        datetime_output = DateHandler.str_to_datetime_object("2020-02-29 20:20:20")
+        assert datetime_output == datetime(
+            year=2020, month=2, day=29, hour=20, minute=20, second=20,
+        )
+
+    def test_invalid_boundary_str(self):
+        with pytest.raises(BadRequestError):
+            DateHandler.str_to_datetime_object("2019-02-29 12:05:09")
+
+    def test_invalid_str_format_symbols(self):
+        with pytest.raises(BadRequestError):
+            DateHandler.str_to_datetime_object("2019/10/05 12:05:09")
+
+    def test_invalid_str_format_order(self):
+        with pytest.raises(BadRequestError):
+            DateHandler.str_to_datetime_object("12:05:09 2019-10-05")
+
+
+class TestDatetimeToStr:
+    def test_valid_datetime(self):
+        example_date = datetime(
+            year=2008, month=10, day=15, hour=12, minute=5, second=9,
+        )
+        str_date_output = DateHandler.datetime_object_to_str(example_date)
+        assert str_date_output == "2008-10-15 12:05:09"
+
+    def test_valid_datetime_no_time(self):
+        example_date = datetime(year=2008, month=10, day=15)
+        str_date_output = DateHandler.datetime_object_to_str(example_date)
+        assert str_date_output == "2008-10-15 00:00:00"
+
+    def test_valid_boundary_datetime(self):
+        # Can't test invalid leap years as invalid datetime objects can't be created
+        example_date = datetime(
+            year=2020, month=2, day=29, hour=23, minute=59, second=59,
+        )
+        str_date_output = DateHandler.datetime_object_to_str(example_date)
+        assert str_date_output == "2020-02-29 23:59:59"
+
+    def test_invalid_datetime(self):
+        # TODO - Not sure how to create an invalid datetime object
+        pass