package graph

import "testing"

func TestWALCheckpointNeededOnlyForLargeCleanWAL(t *testing.T) {
	const threshold int64 = 128 << 20
	if walCheckpointNeeded(true, threshold*2, threshold) {
		t.Fatal("dirty graphs must not trigger a truncating WAL checkpoint")
	}
	if walCheckpointNeeded(false, threshold-1, threshold) {
		t.Fatal("small WAL files must not trigger a truncating checkpoint")
	}
	if !walCheckpointNeeded(false, threshold, threshold) {
		t.Fatal("a clean WAL at the threshold must be checkpointed")
	}
}