What is output?

public class UnitTest$\{$

public int square$($int value$)\{$

return value $*1$;

$\}$

public static void main$($String$[]$ args$)\{$

UnitTest testObject $=$ new UnitTest$()$;

if$($testObject$.$square$(3)!=9)\{$

System.out.println$("$Error: square$(3)")$;

$\}$

if$($testObject$.$square$(1)!=1)\{$

System.out.println$("$Error: square$(1)")$;

$\}$

if$($testObject$.$square$(-1)!=1)\{$

System.out.println$("$Error: square$(-1)")$;

$\}$

System.out.println$("$Tests complete."$)$;

$\}$

$\}$

$\}$