feat: Replace find() implementation with Python (#373)

stock_indicators/_cslib/__init__.py

@@ -39,7 +39,6 @@
 from Skender.Stock.Indicators import QuoteUtility as CsQuoteUtility
 from Skender.Stock.Indicators import ResultBase as CsResultBase
 from Skender.Stock.Indicators import Pruning as CsPruning
-from Skender.Stock.Indicators import Seeking as CsSeeking
 
 # Enums
 from Skender.Stock.Indicators import BetaType as CsBetaType

stock_indicators/indicators/common/results.py

@@ -1,7 +1,7 @@
 from datetime import datetime as PyDateTime
-from typing import Callable, Iterable, List, Type, TypeVar
+from typing import Callable, Iterable, List, Optional, Type, TypeVar
 
-from stock_indicators._cslib import CsResultBase, CsPruning, CsSeeking
+from stock_indicators._cslib import CsResultBase, CsPruning
 from stock_indicators._cstypes import DateTime as CsDateTime
 from stock_indicators._cstypes import List as CsList
 from stock_indicators._cstypes import to_pydatetime
@@ -77,18 +77,14 @@ def __add__(self, other: "IndicatorResults"):
     def __mul__(self, value: int):
         return self.__class__(list(self._csdata).__mul__(value), self._wrapper_class)
 
-    @_verify_data
-    def find(self, lookup_date: PyDateTime) -> _T:
-        """Find indicator values on a specific date."""
+    def find(self, lookup_date: PyDateTime) -> Optional[_T]:
+        """Find indicator values on a specific date. It returns `None` if no result found."""
         if not isinstance(lookup_date, PyDateTime):
             raise TypeError(
                 "lookup_date must be an instance of datetime.datetime."
             )
-
-        result = CsSeeking.Find[CsResultBase](
-            CsList(self._get_csdata_type(), self._csdata), CsDateTime(lookup_date)
-        )
-        return self._wrapper_class(result)
+
+        return next((r for r in self if r.date == lookup_date), None)
 
     @_verify_data
     def remove_warmup_periods(self, remove_periods: int):

tests/common/test_indicator_results.py

@@ -49,9 +49,16 @@ def test_done_and_reload(self, quotes):
     def test_find(self, quotes):
         results = indicators.get_sma(quotes, 20)
 
-        # r[18]
-        r = results.find(datetime(2017, 1, 30))
-        assert r.sma is None
+        # r[19]
+        r = results.find(datetime(2017, 1, 31))
+        assert 214.5250 == round(float(r.sma), 4)
+
+    def test_not_found(self, quotes):
+        results = indicators.get_sma(quotes, 20)
+
+        # returns None
+        r = results.find(datetime(1996, 10, 12))
+        assert r is None
 
     def test_remove_with_period(self, quotes):
         results = indicators.get_sma(quotes, 20)