package display

import "testing"

func TestVideoPresenceTransitionsReportChange(t *testing.T) {
	presence := NewVideoPresence()

	if presence.Active() {
		t.Fatal("video must be absent before any signal")
	}
	if !presence.SetActive(true) {
		t.Fatal("first video appearance must report a change")
	}
	if !presence.Active() {
		t.Fatal("video must be active after appearance")
	}
	if presence.SetActive(true) {
		t.Fatal("repeated appearance must not report a change")
	}
	if !presence.SetActive(false) {
		t.Fatal("video end must report a change")
	}
	if presence.Active() {
		t.Fatal("video must be inactive after end")
	}
}