fix: Retain timezone awareness

stock_indicators/_cstypes/datetime.py

@@ -20,7 +20,7 @@ class DateTime:
         3/26/2021 10:02:22 PM
     """
     def __new__(cls, datetime: PyDateTime) -> CsDateTime:
-        return CsDateTime.Parse(datetime.isoformat())
+        return CsDateTime.Parse(datetime.isoformat(timespec='seconds'))
 
 
 def to_pydatetime(cs_datetime: CsDateTime) -> PyDateTime:
@@ -30,4 +30,4 @@ def to_pydatetime(cs_datetime: CsDateTime) -> PyDateTime:
     Parameter:
         cs_datetime : `System.DateTime` of C#.
     """
-    return PyDateTime.fromisoformat(cs_datetime.ToString("s", CsCultureInfo.InvariantCulture))
+    return PyDateTime.fromisoformat(cs_datetime.ToString("o", CsCultureInfo.InvariantCulture))

tests/common/test_cstype_conversion.py

@@ -1,9 +1,11 @@
 from datetime import datetime
 from numbers import Number
+from decimal import Decimal
 
 from stock_indicators._cslib import CsCultureInfo
 from stock_indicators._cstypes import DateTime as CsDateTime
 from stock_indicators._cstypes import to_pydatetime
+from stock_indicators.indicators.common.quote import Quote
 
 class TestCsTypeConversion:
     def test_datetime_conversion(self):
@@ -40,3 +42,17 @@ def test_auto_conversion_from_double_to_float(self):
         assert isinstance(cs_double, Number)
         assert isinstance(cs_double, float)
         assert 1996.1012 == cs_double
+
+    def test_quote_constructor_retains_timezone(self):
+        dt = datetime.fromisoformat('2000-03-26 23:00+0000')
+        q = Quote(
+            date=dt,
+            open=Decimal('23'),
+            high=Decimal('26'),
+            low=Decimal('20'),
+            close=Decimal('25'),
+            volume=Decimal('323')
+        )
+
+        assert str(q.date.tzinfo) == 'UTC'
+        assert str(q.date.time()) == '23:00:00'