style: format test file with black

tests/test_e2e_playwright.py

@@ -287,70 +287,70 @@ def test_homepage_and_options_page_render() -> None:
 
 def test_backtest_page_loads_with_valid_databento_dates() -> None:
     """E2E test: Backtest page loads and validates Databento date range.
-    
+
-    Regression test for CORE-003: Ensures backtest page handles Databento 
+    Regression test for CORE-003: Ensures backtest page handles Databento
     dataset date constraints gracefully without 500 errors.
     """
     with sync_playwright() as p:
         browser = p.chromium.launch(headless=True)
         page = browser.new_page(viewport={"width": 1440, "height": 1000})
-        
+
         # Navigate to backtests page
         page.goto(f"{BASE_URL}/backtests", wait_until="domcontentloaded", timeout=30000)
         page.wait_for_load_state("networkidle", timeout=15000)
-        
+
         # Verify page loaded without 500 error
         expect(page.locator("text=Scenario Configuration")).to_be_visible(timeout=10000)
-        
+
         # Verify data source is set to Databento by default
         data_source = page.locator("[data-testid=data-source-select]")
         expect(data_source).to_be_visible()
-        
+
-        # Verify dataset is XNAS.BASIC  
+        # Verify dataset is XNAS.BASIC
         dataset = page.locator("[data-testid=dataset-select]")
         expect(dataset).to_be_visible()
-        
+
         # Verify date range hint shows correct minimum date for XNAS.BASIC
         date_hint = page.locator("text=XNAS.BASIC data available from 2024-07-01")
         expect(date_hint).to_be_visible(timeout=5000)
-        
+
         # Verify start date input is set to valid date (2024-07-01 or later)
         start_input = page.locator("input[placeholder*='Start date']").first
         start_value = start_input.input_value()
         assert start_value >= "2024-07-01", f"Start date {start_value} should be >= 2024-07-01"
-        
+
         # Verify no 500 error on page
         error_500 = page.locator("text=500").count()
         assert error_500 == 0, "Page should not show 500 error"
-        
+
         page.screenshot(path=str(ARTIFACTS / "backtest_loads.png"), full_page=True)
         browser.close()
 
 
 def test_backtest_page_handles_invalid_dates_gracefully() -> None:
     """E2E test: Backtest page shows validation error for invalid dates.
-    
+
-    Regression test: Ensures user-friendly error instead of 500 when 
+    Regression test: Ensures user-friendly error instead of 500 when
     dates are before dataset availability.
     """
     with sync_playwright() as p:
         browser = p.chromium.launch(headless=True)
         page = browser.new_page(viewport={"width": 1440, "height": 1000})
-        
+
         page.goto(f"{BASE_URL}/backtests", wait_until="domcontentloaded", timeout=30000)
         page.wait_for_load_state("networkidle", timeout=15000)
-        
+
         # Set invalid start date (before 2024-07-01)
         start_input = page.locator("input[placeholder*='Start date']").first
         start_input.fill("2024-03-01")
         start_input.press("Tab")  # Trigger blur/validation
-        
+
         page.wait_for_timeout(2000)
-        
+
         # Should show validation error or prevent running, not crash
         # Verify no 500 error
         error_500 = page.locator("text=500").count()
         assert error_500 == 0, "Page should not show 500 error for invalid dates"
-        
+
         page.screenshot(path=str(ARTIFACTS / "backtest_invalid_dates.png"), full_page=True)
         browser.close()