d.init(x, 0)
		d.roundUp(test.n)
		if got := d.String(); got != test.up {
			t.Errorf("roundUp(%d, %d) = %s; want %s", test.x, test.n, got, test.up)
		}
	}
}

var sink string

func BenchmarkDecimalConversion(b *testing.B) {
	for i := 0; i < b.N; i++ {
		for shift := -100; shift <= +100; shift++ {
			var d decimal
			d.init(natOne, shift)
			sink = d.String()
		}
	}
}