t.Errorf("%v: unexpected result: %d", test, c)
			}
		} else {
			if c != test.a {
				t.Errorf("%v: overflow multiplication mutated source: %d", test, c)
			}
		}
	}
}

func TestInt64AsCanonicalString(t *testing.T) {
	for _, test := range []struct {
		value    int64
		scale    Scale
		result   string
		exponent int32
	}{
		{100, 0, "100", 0},
		{100, 1, "1", 3},
		{100, -1, "10", 0},