test: add web coverage and e2e tests

tests/test_web_coverage.py

@@ -0,0 +1,95 @@
+"""FastAPI TestClient-based tests for accurate coverage measurement."""
+from __future__ import annotations
+import io, json, pytest
+from fastapi.testclient import TestClient
+from web.api import app
+
+client = TestClient(app)
+
+
+def test_index():
+    r = client.get("/")
+    assert r.status_code == 200
+    assert "verify" in r.text.lower()
+
+
+def test_verify_422_empty():
+    r = client.post("/verify")
+    assert r.status_code == 422
+
+
+def test_verify_202():
+    r = client.post("/verify",
+        files={
+            "copybook": ("t.cpy", b"x", "text/plain"),
+            "cobol_src": ("t.cbl", b"x", "text/plain"),
+            "java_src": ("t.java", b"x", "text/plain"),
+            "mapping": ("t.yaml", b"x", "text/plain"),
+        },
+        data={"runner": "native"})
+    assert r.status_code == 202
+    body = r.json()
+    assert "task_id" in body
+    return body["task_id"]
+
+
+def test_verify_large_file_413():
+    r = client.post("/verify",
+        files={
+            "copybook": ("t.cpy", b"x", "text/plain"),
+            "cobol_src": ("t.cbl", b"x" * (10 * 1024 * 1024 + 1), "application/octet-stream"),
+            "java_src": ("t.java", b"x", "text/plain"),
+            "mapping": ("t.yaml", b"x", "text/plain"),
+        },
+        data={"runner": "native"})
+    assert r.status_code == 413
+
+
+def test_status_404():
+    r = client.get("/status/nonexistent")
+    assert r.status_code == 404
+
+
+def test_status_ok():
+    tid = test_verify_202()
+    r = client.get(f"/status/{tid}")
+    assert r.status_code == 200
+    body = r.json()
+    assert body["status"] in ("queued", "running", "done", "error")
+
+
+def test_fields_404():
+    r = client.get("/fields/nonexistent")
+    assert r.status_code == 404
+
+
+def test_fields_ok():
+    tid = test_verify_202()
+    r = client.get(f"/fields/{tid}")
+    assert r.status_code == 200
+    body = r.json()
+    assert "fields" in body
+    assert "debug" in body
+    assert "build_log" in body
+
+
+def test_result_404():
+    r = client.get("/result/nonexistent")
+    assert r.status_code == 404
+
+
+def test_result_page():
+    tid = test_verify_202()
+    r = client.get(f"/result/{tid}")
+    assert r.status_code == 200
+    assert tid in r.text
+
+
+def test_static_css():
+    r = client.get("/static/style.css")
+    assert r.status_code == 200
+
+
+def test_static_js():
+    r = client.get("/static/script.js")
+    assert r.status_code == 200