func TestConcAlloc(t *testing.T) {
	rands := rand.New(rand.NewSource(1234567890))
	for i := 0; i < 10000; i++ {
		test1ConcAlloc(t, rands)
	}
}

func test1ConcAlloc(t *testing.T, rands *rand.Rand) {
	probLen := ([]int{0, 1, 2, 3, 4, 6, 9})[rands.Intn(7)]
	classes := make([]allocProblemItem, probLen)
	var lowSum, highSum float64
	var requiredSum int