Gause to orsted

tests/test_gauss_to_oersted_conversion_rate.py

@@ -0,0 +1,43 @@
+import re
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+CALCULATORS_TS = ROOT / "hdyc-svelte" / "src" / "lib" / "data" / "calculators.ts"
+CONVERSION_RATE_UTIL = ROOT / "hdyc-svelte" / "src" / "lib" / "utils" / "conversionRate.ts"
+CATEGORY_PAGE = ROOT / "hdyc-svelte" / "src" / "routes" / "category" / "[category]" / "+page.svelte"
+CALCULATOR_COMPONENT = ROOT / "hdyc-svelte" / "src" / "lib" / "components" / "Calculator.svelte"
+TARGET_SLUG = "gauss-to-oersted"
+
+
+def _extract_calculator_block(slug: str) -> str:
+    for line in CALCULATORS_TS.read_text(encoding="utf-8").splitlines():
+        if f'"slug": "{slug}"' in line:
+            return line
+    raise AssertionError(f"Could not find calculator definition for '{slug}'")
+
+
+class GaussToOerstedConversionRateRegressionTests(unittest.TestCase):
+    def test_gauss_to_oersted_includes_factor_for_conversion_rate_and_tooltip(self) -> None:
+        block = _extract_calculator_block(TARGET_SLUG)
+        self.assertRegex(
+            block,
+            r'"factor":\s*[0-9.eE+-]+',
+            "Missing factor on gauss-to-oersted prevents conversion rate text from rendering in both calculator footer and category tooltip.",
+        )
+
+    def test_conversion_rate_is_wired_to_both_surfaces(self) -> None:
+        util_text = CONVERSION_RATE_UTIL.read_text(encoding="utf-8")
+        category_page_text = CATEGORY_PAGE.read_text(encoding="utf-8")
+        calculator_component_text = CALCULATOR_COMPONENT.read_text(encoding="utf-8")
+
+        self.assertIn("getConversionRateText", util_text)
+        self.assertIn("conversionRateText = getConversionRateText(calc)", category_page_text)
+        self.assertIn('role="tooltip"', category_page_text)
+        self.assertIn("conversionRateText = getConversionRateText(config)", calculator_component_text)
+        self.assertIn('<span class="formula-hint">', calculator_component_text)
+
+
+if __name__ == "__main__":
+    unittest.main()