### Question:
RandomGeneratorImpl implements RandomGenerator { @Override public char randUpperCaseChar() { return (char) (rand.nextInt(26) + 'A'); }  @Override char randLowerCaseChar(); @Override char randUpperCaseChar(); @Override char randChar(); @Override List<Character> randLowerCaseChars(int num); @Override List<Character> randUpperCaseChars(int num); @Override List<Character> randChars(int num); @Override int randInt(int lowBound, int upBound); @Override List<Integer> randIntegers(int lowBount, int upBount, int length); @Override String randString(int charCount, int intCount, boolean mustSeartWithAlph); @Override List<String> randStrings(int size, int alphNum, int digitNum, boolean mustStartWithAlph); @Override double randDouble(double lowBound, double upBound); @Override List<Double> randDoubles(int size, double lowBound, double upBound); @Override boolean randBoolean();  }### Answer:
@Test public void randUpperCaseChar() throws Exception { int iter = 1000; for (int i = 0; i < iter; i++) { char c = randomGenerator.randUpperCaseChar(); assertTrue(c >= 'A' && c <='Z'); } }