@Test
public void testPlus() throws Exception {
evaluate("7 + 2", "9", Integer.class);
evaluate("3.0f + 5.0f", 8.0f, Float.class);
evaluate("3.0d + 5.0d", 8.0d, Double.class);
evaluate("'ab' + 2", "ab2", String.class);
evaluate("2 + 'a'", "2a", String.class);
evaluate("'ab' + null", "abnull", String.class);
evaluate("null + 'ab'", "nullab", String.class);
// AST:
SpelExpression expr = (SpelExpression) parser.parseExpression("+3");
Assert.assertEquals("+3", expr.toStringAST());
expr = (SpelExpression) parser.parseExpression("2+3");
Assert.assertEquals("(2 + 3)", expr.toStringAST());
// use as a unary operator
evaluate("+5d", 5d, Double.class);
evaluate("+5L", 5L, Long.class);
evaluate("+5", 5, Integer.class);
evaluateAndCheckError("+'abc'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
// string concatenation
evaluate("'abc'+'def'", "abcdef", String.class);
//
evaluate("5 + new Integer('37')", 42, Integer.class);
}
@Test
public void testMinus() throws Exception {
evaluate("'c' - 2", "a", String.class);
evaluate("3.0f - 5.0f", -2.0f, Float.class);
evaluateAndCheckError("'ab' - 2", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
evaluateAndCheckError("2-'ab'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
SpelExpression expr = (SpelExpression) parser.parseExpression("-3");
Assert.assertEquals("-3", expr.toStringAST());
expr = (SpelExpression) parser.parseExpression("2-3");
Assert.assertEquals("(2 - 3)", expr.toStringAST());
evaluate("-5d", -5d, Double.class);
evaluate("-5L", -5L, Long.class);
evaluate("-5", -5, Integer.class);
evaluateAndCheckError("-'abc'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
}