t.Errorf("wrong B.y: got %s, expected %s", got, y)
	}
	if B.z.Equal(feOne) != 1 {
		t.Errorf("wrong B.z: got %v, expected 1", B.z)
	}
	// Check that t is correct.
	checkOnCurve(t, B)
}

func TestAddSubNegOnBasePoint(t *testing.T) {
	checkLhs, checkRhs := &Point{}, &Point{}

	checkLhs.Add(B, B)
	tmpP2 := new(projP2).FromP3(B)
	tmpP1xP1 := new(projP1xP1).Double(tmpP2)
	checkRhs.fromP1xP1(tmpP1xP1)