} {
		if got := z.Binomial(test.n, test.k).String(); got != test.want {
			t.Errorf("Binomial(%d, %d) = %s; want %s", test.n, test.k, got, test.want)
		}
	}
}

func BenchmarkBinomial(b *testing.B) {
	var z Int
	for i := 0; i < b.N; i++ {
		z.Binomial(1000, 990)
	}
}

// Examples from the Go Language Spec, section "Arithmetic operators"
var divisionSignsTests = []struct {