t.Errorf("%s: got %s; want %s", test.x, got, x)
			}
		}
	}

	// check that supplied *Rat is used
	for _, f := range []string{"0", "1", "-1", "1234"} {
		x := makeFloat(f)
		r := new(Rat)
		if res, _ := x.Rat(r); res != r {
			t.Errorf("(%s).Rat is not using supplied *Rat", f)
		}
	}
}

func TestFloatAbs(t *testing.T) {
	for _, test := range []string{
		"0",

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