package cache

import "testing"

// The index name is derived from the key rather than passed in, so this is the whole of
// what stands between a user-scoped write and an invalidation that misses it.
func TestUserIndexFor(t *testing.T) {
	cases := []struct {
		name string
		key  string
		want string
	}{
		{"user view", UserKey("abc123", "home:v4:24"), "idx:u:abc123"},
		{"view containing colons", UserKey("abc123", "item:v6:9f:2"), "idx:u:abc123"},
		{"recommendations are deliberately outside the namespace", RecommendationsKey("abc"), ""},
		{"magic pool likewise", MagicPoolKey("abc"), ""},
		{"household metadata belongs to nobody", MetadataKey("person:v2:44"), ""},
		{"a session is not a view", SessionKey("deadbeef"), ""},
		{"a malformed user key indexes nothing rather than guessing", "u:", ""},
		{"a user key with no view is not a view either", "u:abc", ""},
	}
	for _, test := range cases {
		t.Run(test.name, func(t *testing.T) {
			if got := userIndexFor(test.key); got != test.want {
				t.Fatalf("userIndexFor(%q) = %q, want %q", test.key, got, test.want)
			}
		})
	}
}