@Test(expected = InvalidTypeException.class)
public void nullIsNotAllowed() throws PseudoException {
NullEvaluator op1 = new NullEvaluator();
IntegerEvaluator op2 = new IntegerEvaluator(0);
MultEvaluator evaluator = new MultEvaluator(op1, op2);
evaluator.evaluate(scope);
fail("Cannot perform arithmetic on Null.");
}
@Test(expected = InvalidTypeException.class)
public void stringMultipliedByStringIsNotAllowed() throws PseudoException {
MultEvaluator evaluator = new MultEvaluator(new StringEvaluator("9"), new StringEvaluator("3"));
evaluator.evaluate(scope);
fail("A string cannot be used in division.");
}
@Test
public void integerMultipliedByDoubleIsADouble() throws PseudoException {
MultEvaluator evaluator = new MultEvaluator(new IntegerEvaluator(0), new DoubleEvaluator(0.0));
Type ret = evaluator.evaluate(scope);
assertEquals("0*0.0 must be double 0.0.", 0.0, (Double) ret.getValue(), 0.01);
}
@Test
public void doubleMultipliedByIntegerIsADouble() throws PseudoException {
MultEvaluator evaluator = new MultEvaluator(new DoubleEvaluator(3.0), new IntegerEvaluator(3));
Type ret = evaluator.evaluate(scope);
assertEquals("3.0*3 must be double 9.0.", 9.0, (Double) ret.getValue(), 0.01);
}
@Test
public void integerMultipliedByIntegerIsAnInteger() throws PseudoException {
MultEvaluator evaluator = new MultEvaluator(new IntegerEvaluator(1), new IntegerEvaluator(1));
Type ret = evaluator.evaluate(scope);
assertEquals("1*1 must be integer 1.", 1, ret.getValue());
}