Examples with SpelExpression org.springframework.expression.spel.standard.SpelExpression used on opensource projects

Example 56 with SpelExpression

use of org.springframework.expression.spel.standard.SpelExpression in project spring-framework by spring-projects.

the class ReflectionHelperTests method testUtilities.

@Test
public void testUtilities() throws ParseException {
    SpelExpression expr = (SpelExpression) parser.parseExpression("3+4+5+6+7-2");
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    PrintStream ps = new PrintStream(baos);
    SpelUtilities.printAbstractSyntaxTree(ps, expr);
    ps.flush();
    String s = baos.toString();
    // ===> Expression '3+4+5+6+7-2' - AST start
    // OperatorMinus  value:(((((3 + 4) + 5) + 6) + 7) - 2)  #children:2
    // OperatorPlus  value:((((3 + 4) + 5) + 6) + 7)  #children:2
    // OperatorPlus  value:(((3 + 4) + 5) + 6)  #children:2
    // OperatorPlus  value:((3 + 4) + 5)  #children:2
    // OperatorPlus  value:(3 + 4)  #children:2
    // CompoundExpression  value:3
    // IntLiteral  value:3
    // CompoundExpression  value:4
    // IntLiteral  value:4
    // CompoundExpression  value:5
    // IntLiteral  value:5
    // CompoundExpression  value:6
    // IntLiteral  value:6
    // CompoundExpression  value:7
    // IntLiteral  value:7
    // CompoundExpression  value:2
    // IntLiteral  value:2
    // ===> Expression '3+4+5+6+7-2' - AST end
    assertThat(s.contains("===> Expression '3+4+5+6+7-2' - AST start")).isTrue();
    assertThat(s.contains(" OpPlus  value:((((3 + 4) + 5) + 6) + 7)  #children:2")).isTrue();
}