func TestFirstOnlyEmpty(t *testing.T) {
stream := functional.NilStream()
var value int
if output := FirstOnly(stream, emptyError, &value); output != emptyError {
t.Errorf("Expected emptyError, got %v", output)
}
}
func TestPageBufferEmptyLow(t *testing.T) {
stream := &closeChecker{
Stream: functional.NilStream()}
pb := NewPageBuffer(make([]int, 6), -1)
pb.Consume(stream)
verifyPageFetched(t, pb, 0, 0, 0, true)
}