static int runTestCase(int casenum__) {
		switch (casenum__) {
		case 0: {
			int n = 0;
			int expected__ = 0;

			return verifyCase(casenum__, expected__, new SquareDigitNumbers().getNumber(n));
		}
		case 1: {
			int n = 5;
			int expected__ = 11;

			return verifyCase(casenum__, expected__, new SquareDigitNumbers().getNumber(n));
		}
		case 2: {
			int n = 16;
			int expected__ = 100;

			return verifyCase(casenum__, expected__, new SquareDigitNumbers().getNumber(n));
		}
		case 3: {
			int n = 121;
			int expected__ = 1941;

			return verifyCase(casenum__, expected__, new SquareDigitNumbers().getNumber(n));
		}
		case 4: {
			int n = 123;
			int expected__ = 1949;

			return verifyCase(casenum__, expected__, new SquareDigitNumbers().getNumber(n));
		}

		// custom cases

		case 5: {
			int n = 1000;
			int expected__ = 99440;

			return verifyCase(casenum__, expected__, new
					SquareDigitNumbers().getNumber(n));
		}

		/*
		 * case 6: {
		 * int n = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum__, expected__, new
		 * SquareDigitNumbers().getNumber(n));
		 * }
		 */
		/*
		 * case 7: {
		 * int n = ;
		 * int expected__ = ;
		 *
		 * return verifyCase(casenum__, expected__, new
		 * SquareDigitNumbers().getNumber(n));
		 * }
		 */
		default:
			return -1;
		}
	}