refactor: migrate project structure to Vue 3 with Vite and Tailwind CSS integration

tests/test_dea_api.py

@@ -0,0 +1,84 @@
+import asyncio
+import io
+import unittest
+
+from fastapi import HTTPException, UploadFile
+from fastapi.responses import JSONResponse
+
+from dea_api import BodeParams, DesignParams, add_security_headers, calculate_bode, design_filter, filter_csv
+
+
+class DeaApiTest(unittest.TestCase):
+    def test_design_returns_normalized_coefficients_for_default_lowpass(self):
+        body = design_filter(
+            DesignParams(
+                filter_type="Lowpass (低通)",
+                fs=100000,
+                lp_fc=1000,
+                lp_order=1,
+            )
+        )
+
+        self.assertGreater(len(body["b"]), 0)
+        self.assertGreater(len(body["a"]), 0)
+        self.assertAlmostEqual(body["a"][0], 1.0)
+
+    def test_design_rejects_cutoff_at_or_above_nyquist(self):
+        try:
+            design_filter(
+                DesignParams(
+                    filter_type="Lowpass (低通)",
+                    fs=1000,
+                    lp_fc=500,
+                    lp_order=1,
+                )
+            )
+        except HTTPException as exc:
+            self.assertEqual(exc.status_code, 400)
+            self.assertIn("Nyquist", exc.detail)
+        else:
+            raise AssertionError("Expected Nyquist validation to fail")
+
+
+    def test_bode_rejects_zero_a0(self):
+        try:
+            calculate_bode(BodeParams(fs=1000, b=[1.0], a=[0.0, 1.0]))
+        except HTTPException as exc:
+            self.assertEqual(exc.status_code, 400)
+            self.assertIn("a[0]", exc.detail)
+        else:
+            raise AssertionError("Expected a[0] validation to fail")
+
+
+    def test_filter_downsamples_plot_response_for_large_csv(self):
+        rows = ["value"] + [str(i) for i in range(6001)]
+        upload = UploadFile(
+            io.BytesIO(("\n".join(rows) + "\n").encode("utf-8")),
+            filename="input.csv",
+        )
+
+        body = asyncio.run(filter_csv(file=upload, b="1", a="1", col_idx=0))
+
+        self.assertEqual(body["total_points"], 6001)
+        self.assertLessEqual(body["plot_points"], 5000)
+        self.assertGreater(body["downsample_step"], 1)
+
+
+    def test_filter_rejects_non_numeric_signal_column(self):
+        upload = UploadFile(io.BytesIO(b"value\n1\nbad\n3\n"), filename="input.csv")
+
+        try:
+            asyncio.run(filter_csv(file=upload, b="1", a="1", col_idx=0))
+        except HTTPException as exc:
+            self.assertEqual(exc.status_code, 400)
+            self.assertIn("非數值", exc.detail)
+        else:
+            raise AssertionError("Expected non-numeric column validation to fail")
+
+    def test_security_headers_are_applied(self):
+        response = add_security_headers(JSONResponse({"ok": True}))
+
+        self.assertEqual(response.headers["X-Content-Type-Options"], "nosniff")
+        self.assertEqual(response.headers["X-Frame-Options"], "DENY")
+        self.assertIn("frame-ancestors 'none'", response.headers["Content-Security-Policy"])
+        self.assertNotIn("unsafe-eval", response.headers["Content-Security-Policy"])