)

func TestSynchronous(t *testing.T) {
	// Root is always run sync.
	newLevels().
		// Level 1: bf=5(sync)
		Add(5, false).
		// Level 2: bf=2(sync)
		Add(2, false).
		// Level 3: bf=2(sync)
		Add(2, false).
		Build().
		Run(t)
}

func TestParallel(t *testing.T) {
	// Root is always run sync.
	newLevels().
		// Level 1: bf=20(parallel)
		Add(20, true).
		// Level 2: bf=5(parallel)

					p.resultTypes[i] = stack.lastDirectionalOverrideStatus()
				}
			}

			var newLevel level
			if isRTL {
				// least greater odd
				newLevel = (stack.lastEmbeddingLevel() + 1) | 1
			} else {
				// least greater even
				newLevel = (stack.lastEmbeddingLevel() + 2) &^ 1
			}

			if newLevel <= maxDepth && overflowIsolateCount == 0 && overflowEmbeddingCount == 0 {
				if isIsolate {