public final static void main(String[] args) {
		hasFailed = false;
		if(!test1())
			System.err.println("Test 1 failed.");
		
		hasFailed = false;
		if(!test2())
			System.err.println("Test 2 failed.");

		hasFailed = false;
		if(!test3())
			System.err.println("Test 3 failed.");
		
		hasFailed = false;
		if(!test4())
			System.err.println("Test 4 failed.");
	}