package handler

import "testing"

// Both channel names must resolve during the private-channel migration:
// matching only one would silently stop evicting feed seen-sets for every
// client still on the other name.
func TestUserIDFromNotifChannel(t *testing.T) {
	tests := []struct {
		channel string
		wantID  string
		wantOK  bool
	}{
		{"private-notifications.user-a", "user-a", true},
		{"notifications.user-a", "user-a", true},
		{"private-notifications.", "", false},
		{"notifications.", "", false},
		{"presence-conversation.c1", "", false},
		{"", "", false},
		// Guards against a naive suffix split: the private name must not be
		// mistaken for the legacy one and yield a mangled id.
		{"private-notifications.notifications.x", "notifications.x", true},
	}
	for _, tc := range tests {
		gotID, gotOK := userIDFromNotifChannel(tc.channel)
		if gotOK != tc.wantOK || (tc.wantOK && gotID != tc.wantID) {
			t.Errorf("userIDFromNotifChannel(%q) = (%q, %v), want (%q, %v)",
				tc.channel, gotID, gotOK, tc.wantID, tc.wantOK)
		}
	}
}