### Question:
SecurityChecks { public static ISecurityCheck and(ISecurityCheck[] checks) { return new AndSecurityCheck(checks); }  static ISecurityCheck and(ISecurityCheck[] checks); static ISecurityCheck and(ISecurityCheck check1, ISecurityCheck check2); static ISecurityCheck or(ISecurityCheck[] checks); static ISecurityCheck or(ISecurityCheck check1, ISecurityCheck check2);  }### Answer:
@Test public void testAnd() { runCheck(SecurityChecks.and(null, null), true, true); runCheck(SecurityChecks.and(null), true, true); runCheck(SecurityChecks.and(new BogusCheck(true), null), true, true); runCheck(SecurityChecks.and(new ISecurityCheck[] { new BogusCheck(true) }), true, true); runCheck(SecurityChecks.and(new ISecurityCheck[] { new BogusCheck(true), null }), true, true); runCheck( SecurityChecks.and(new ISecurityCheck[] { new BogusCheck(true), new BogusCheck(true, false) }), true, false); runCheck( SecurityChecks.and(new ISecurityCheck[] { new BogusCheck(true), new BogusCheck(false, true) }), false, true); runCheck( SecurityChecks.and(new ISecurityCheck[] { new BogusCheck(true), null, new BogusCheck(true), new BogusCheck(false) }), false, false); runCheck(SecurityChecks.and(new ISecurityCheck[] { new BogusCheck(false) }), false, false); runCheck(SecurityChecks.and(new BogusCheck(false), new BogusCheck(false)), false, false); }