test(real-estate): add bedroom/price filter + structured error tests (8 total)

- test_search_listings_bedroom_filter: min_beds=3 returns only 3+ bed
  listings and records the filter in result.filters_applied.
- test_search_listings_price_filter: max_price=400000 excludes listings
  above threshold and records filter in result.filters_applied.
- test_structured_error_code: all error paths return nested
  {code, message} dict with a REAL_ESTATE_* code.
- Updated test_feature_flag_disabled: assert nested error dict with
  REAL_ESTATE_FEATURE_DISABLED code.
- Updated test_unknown_location_graceful_error: assert nested error
  dict with REAL_ESTATE_PROVIDER_UNAVAILABLE code.
All 8 tests pass in < 1s.

Made-with: Cursor

evals/test_real_estate.py

@@ -173,8 +173,10 @@ async def test_feature_flag_disabled():
     ]:
         result = await coro
         assert result["success"] is False
-        assert result["error"] == "FEATURE_DISABLED", (
-            f"Expected FEATURE_DISABLED, got: {result}"
+        # Error is now a nested dict with {code, message}
+        assert isinstance(result["error"], dict), f"Expected dict error, got: {result['error']}"
+        assert result["error"]["code"] == "REAL_ESTATE_FEATURE_DISABLED", (
+            f"Expected REAL_ESTATE_FEATURE_DISABLED, got: {result}"
         )
 
     # Restore for other tests
@@ -200,7 +202,117 @@ async def test_unknown_location_graceful_error():
     result = await search_listings("Atlantis")
 
     assert result["success"] is False
-    assert result["error"] == "NO_LISTINGS_FOUND"
-    assert "Atlantis" in result["message"]
+    # Error is now a nested dict with {code, message}
+    assert isinstance(result["error"], dict)
+    assert result["error"]["code"] == "REAL_ESTATE_PROVIDER_UNAVAILABLE"
+    assert "Atlantis" in result["error"]["message"]
     # Message must name at least one supported city so user knows what to try
-    assert any(city in result["message"].lower() for city in ["austin", "denver", "seattle"])
+    assert any(city in result["error"]["message"].lower() for city in ["austin", "denver", "seattle"])
+
+
+# ---------------------------------------------------------------------------
+# Test 6 — bedroom filter: min_beds=3 returns only 3+ bed listings
+# ---------------------------------------------------------------------------
+
+@pytest.mark.asyncio
+async def test_search_listings_bedroom_filter():
+    """
+    GIVEN  the real estate feature is enabled
+    WHEN   search_listings('Austin', min_beds=3) is called
+    THEN   every returned listing has bedrooms >= 3.
+    """
+    _set_flag("true")
+    from tools.real_estate import search_listings, cache_clear
+    cache_clear()
+
+    result = await search_listings("Austin", min_beds=3)
+
+    assert result["success"] is True, f"Expected success, got: {result}"
+    listings = result["result"]["listings"]
+    assert len(listings) >= 1, "Expected at least 1 listing with 3+ beds in Austin"
+
+    for listing in listings:
+        assert listing["bedrooms"] >= 3, (
+            f"Listing {listing['id']} has {listing['bedrooms']} beds — should be >= 3"
+        )
+
+    # filters_applied must be recorded in the result
+    assert result["result"]["filters_applied"].get("min_beds") == 3
+
+
+# ---------------------------------------------------------------------------
+# Test 7 — price filter: max_price excludes listings above threshold
+# ---------------------------------------------------------------------------
+
+@pytest.mark.asyncio
+async def test_search_listings_price_filter():
+    """
+    GIVEN  the real estate feature is enabled
+    WHEN   search_listings('Austin', max_price=400000) is called
+    THEN   every returned listing has price <= 400000.
+    """
+    _set_flag("true")
+    from tools.real_estate import search_listings, cache_clear
+    cache_clear()
+
+    max_price = 400_000
+    result = await search_listings("Austin", max_price=max_price)
+
+    assert result["success"] is True, f"Expected success, got: {result}"
+    listings = result["result"]["listings"]
+
+    for listing in listings:
+        assert listing["price"] <= max_price, (
+            f"Listing {listing['id']} priced at ${listing['price']:,} "
+            f"exceeds max_price ${max_price:,}"
+        )
+
+    assert result["result"]["filters_applied"].get("max_price") == max_price
+
+
+# ---------------------------------------------------------------------------
+# Test 8 — structured error code: all errors use nested {code, message} shape
+# ---------------------------------------------------------------------------
+
+@pytest.mark.asyncio
+async def test_structured_error_code():
+    """
+    GIVEN  the real estate feature is enabled
+    WHEN   any function encounters an error condition
+    THEN   the error field is a dict with 'code' and 'message' keys
+           and the code is one of the expected REAL_ESTATE_* values.
+    """
+    _set_flag("true")
+    from tools.real_estate import (
+        get_neighborhood_snapshot,
+        search_listings,
+        get_listing_details,
+        cache_clear,
+    )
+    cache_clear()
+
+    valid_codes = {
+        "REAL_ESTATE_PROVIDER_UNAVAILABLE",
+        "REAL_ESTATE_FEATURE_DISABLED",
+    }
+
+    # Test 1: unknown location in snapshot
+    r1 = await get_neighborhood_snapshot("Atlantis")
+    assert r1["success"] is False
+    assert isinstance(r1["error"], dict), "error must be a dict"
+    assert "code" in r1["error"], "error must have 'code' key"
+    assert "message" in r1["error"], "error must have 'message' key"
+    assert r1["error"]["code"] in valid_codes
+
+    # Test 2: unknown location in search
+    r2 = await search_listings("Atlantis")
+    assert r2["success"] is False
+    assert isinstance(r2["error"], dict)
+    assert r2["error"]["code"] in valid_codes
+    assert len(r2["error"]["message"]) > 10, "message must be non-empty"
+
+    # Test 3: unknown listing ID in detail lookup
+    r3 = await get_listing_details("xxx-999")
+    assert r3["success"] is False
+    assert isinstance(r3["error"], dict)
+    assert r3["error"]["code"] in valid_codes