fix: enforce utf-8 for report template and html file io

GoDiao · GoDiao · commit 48f7553cc88c · 2026-04-22T10:32:25.000+08:00
diff --git a/investing_algorithm_framework/app/reporting/backtest_report.py b/investing_algorithm_framework/app/reporting/backtest_report.py
@@ -34,7 +34,7 @@
 
 
 def _read_template(filename):
-    with open(os.path.join(_TEMPLATE_DIR, filename), 'r') as f:
+    with open(os.path.join(_TEMPLATE_DIR, filename), 'r', encoding='utf-8') as f:
         return f.read()
 
 
@@ -186,7 +186,7 @@ def show(self, backtest_date_range=None, browser=False):
             self.html_report = self._build_html()
 
         path = "/tmp/backtest_report.html"
-        with open(path, "w") as f:
+        with open(path, "w", encoding="utf-8") as f:
             f.write(self.html_report)
 
         if browser:
@@ -208,7 +208,7 @@ def show(self, backtest_date_range=None, browser=False):
     def save(self, path):
         if not self.html_report:
             self.html_report = self._build_html()
-        with open(path, "w") as f:
+        with open(path, "w", encoding="utf-8") as f:
             f.write(self.html_report)
 
     @staticmethod
diff --git a/tests/app/reporting/test_backtest_report_html.py b/tests/app/reporting/test_backtest_report_html.py
@@ -211,7 +211,7 @@ def test_save_creates_file(self):
         report.save(path)
         self.assertTrue(os.path.isfile(path))
 
-        with open(path) as f:
+        with open(path, encoding="utf-8") as f:
             content = f.read()
         self.assertIn("<!DOCTYPE html>", content)
         self.assertIn("const STRATEGIES", content)
