package notify

import "testing"

func TestReceivedSignalCacheDetectsDuplicateAndScopeIsolation(t *testing.T) {
	cache := newReceivedSignalCache(4)

	if duplicate := cache.seenOrRemember("client", 1); duplicate {
		t.Fatal("first signal should not be duplicate")
	}
	if duplicate := cache.seenOrRemember("client", 1); !duplicate {
		t.Fatal("second signal with same scope/id should be duplicate")
	}
	if duplicate := cache.seenOrRemember("server:client-a", 1); duplicate {
		t.Fatal("same signal id in another scope should not be duplicate")
	}
}

func TestReceivedSignalCacheEvictsOldest(t *testing.T) {
	cache := newReceivedSignalCache(2)

	cache.seenOrRemember("client", 1)
	cache.seenOrRemember("client", 2)
	cache.seenOrRemember("client", 3)

	if duplicate := cache.seenOrRemember("client", 1); duplicate {
		t.Fatal("oldest signal should have been evicted from cache")
	}
	if duplicate := cache.seenOrRemember("client", 3); !duplicate {
		t.Fatal("latest signal should still be cached")
	}
}