feat(inventory-go): weapon_types multi-select filter by skill (melee/missile/war/void)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

go-services/inventory-go/search_test.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"net/url"
+	"strings"
+	"testing"
+)
+
+func TestWeaponTypeClause(t *testing.T) {
+	cases := map[string][]string{
+		"heavy":      {"object_class = 1", "'218103840')::int = 44"},
+		"light":      {"object_class = 1", "= 45"},
+		"finesse":    {"object_class = 1", "= 46"},
+		"two_handed": {"object_class = 1", "= 41"},
+		"missile":    {"object_class = 9", "'218103840')::int = 47"},
+		"bow":        {"object_class = 9", "'218103840')::int = 47", "'353')::int = 8"},
+		"crossbow":   {"object_class = 9", "'353')::int = 9"},
+		"thrown":     {"object_class = 9", "'353')::int = 10"},
+		"war":        {"object_class = 31", "'159')::int = 34"},
+		"void":       {"object_class = 31", "'159')::int = 43"},
+		"caster":     {"object_class = 31"},
+	}
+	for wt, subs := range cases {
+		got := weaponTypeClause(wt)
+		for _, s := range subs {
+			if !strings.Contains(got, s) {
+				t.Errorf("weaponTypeClause(%q) = %q, missing %q", wt, got, s)
+			}
+		}
+	}
+	if got := weaponTypeClause("nonsense"); !strings.Contains(got, "object_class IN (1, 9, 31)") {
+		t.Errorf("unknown type = %q, want all-weapons fallback", got)
+	}
+}
+
+func TestWeaponOnlyClause(t *testing.T) {
+	// No types → all weapons.
+	if got := weaponOnlyClause(url.Values{}); !strings.Contains(got, "object_class IN (1, 9, 31)") {
+		t.Errorf("empty = %q, want all weapons", got)
+	}
+	// Single type via weapon_types.
+	got := weaponOnlyClause(url.Values{"weapon_types": {"heavy"}})
+	if !strings.Contains(got, "= 44") || strings.Contains(got, " OR ") {
+		t.Errorf("single = %q, want just heavy, no OR", got)
+	}
+	// Multiple → parenthesized OR, one clause per type.
+	got = weaponOnlyClause(url.Values{"weapon_types": {"heavy,two_handed,war"}})
+	if !strings.HasPrefix(got, "(") || !strings.HasSuffix(got, ")") ||
+		strings.Count(got, " OR ") != 2 ||
+		!strings.Contains(got, "= 44") || !strings.Contains(got, "= 41") || !strings.Contains(got, "= 34") {
+		t.Errorf("multi = %q, want (heavy OR two_handed OR war)", got)
+	}
+	// Legacy weapon_type still honored, deduped against weapon_types.
+	got = weaponOnlyClause(url.Values{"weapon_type": {"missile"}})
+	if !strings.Contains(got, "object_class = 9") {
+		t.Errorf("legacy weapon_type = %q, want missile", got)
+	}
+	got = weaponOnlyClause(url.Values{"weapon_types": {"heavy"}, "weapon_type": {"heavy"}})
+	if strings.Contains(got, " OR ") {
+		t.Errorf("dedup = %q, want single heavy clause", got)
+	}
+}