delete(wantRegions, region.Name)
		}
	}
	if len(wantRegions) != 0 {
		t.Errorf("failed to find regions: %#v", wantRegions)
	}
}

func TestSummarizeTasksTrace(t *testing.T) {
	summaries := summarizeTraceTest(t, "testdata/tests/go122-annotations-stress.test").Tasks
	type task struct {
		name       string
		parent     *trace.TaskID
		children   []trace.TaskID