}
	if expectErr {
		t.Fatalf("Expected error from requiredSum=%v, %s classes=%#+v but got solution %v, %v instead", requiredSum, style, classes, allocs, fairProp)
	}
	rd := f64RelDiff(requiredSumF, actualSumF)
	if rd > fpSlack {
		t.Fatalf("For requiredSum=%v, %s classes=%#+v got solution %v, %v which has sum %v", requiredSum, style, classes, allocs, fairProp, actualSumF)
	}