1 /*
   2  * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.scenario.effect.compiler.parser;
  27 
  28 import com.sun.scenario.effect.compiler.JSLParser;
  29 import com.sun.scenario.effect.compiler.model.Type;
  30 import com.sun.scenario.effect.compiler.model.UnaryOpType;
  31 import com.sun.scenario.effect.compiler.tree.LiteralExpr;
  32 import com.sun.scenario.effect.compiler.tree.UnaryExpr;
  33 import com.sun.scenario.effect.compiler.tree.VariableExpr;
  34 import org.antlr.runtime.RecognitionException;
  35 import org.junit.Before;
  36 import org.junit.Test;
  37 import static org.junit.Assert.assertEquals;
  38 
  39 public class UnaryExprTest extends PrimaryExprTest {
  40 
  41     private String primary;
  42 
  43     @Before
  44     @Override
  45     public void setUp() {
  46         super.setUp();
  47         this.primary = primary();
  48     }
  49 
  50     @Test
  51     public void negated() throws Exception {
  52         UnaryExpr tree = parseTreeFor("!true");
  53         assertEquals(tree.getOp(), UnaryOpType.NOT);
  54         assertEquals(((LiteralExpr)tree.getExpr()).getValue(), Boolean.TRUE);
  55     }
  56 
  57     @Test
  58     public void positive() throws Exception {
  59         UnaryExpr tree = parseTreeFor("+72.4");
  60         assertEquals(tree.getOp(), UnaryOpType.PLUS);
  61         assertEquals(((LiteralExpr)tree.getExpr()).getValue(), new Float(72.4));
  62     }
  63 
  64     @Test
  65     public void negative() throws Exception {
  66         UnaryExpr tree = parseTreeFor("-72.4");
  67         assertEquals(tree.getOp(), UnaryOpType.MINUS);
  68         assertEquals(((LiteralExpr)tree.getExpr()).getValue(), new Float(72.4));
  69     }
  70 
  71     @Test
  72     public void preIncrement() throws Exception {
  73         UnaryExpr tree = parseTreeFor("++foo");
  74         assertEquals(tree.getOp(), UnaryOpType.INC);
  75         assertEquals(((VariableExpr)tree.getExpr()).getVariable().getName(), "foo");
  76     }
  77 
  78     @Test
  79     public void preDecrement() throws Exception {
  80         UnaryExpr tree = parseTreeFor("--foo");
  81         assertEquals(tree.getOp(), UnaryOpType.DEC);
  82         assertEquals(((VariableExpr)tree.getExpr()).getVariable().getName(), "foo");
  83     }
  84 
  85     @Test
  86     public void postIncrement() throws Exception {
  87         UnaryExpr tree = parseTreeFor("foo++");
  88         assertEquals(tree.getOp(), UnaryOpType.INC);
  89         assertEquals(((VariableExpr)tree.getExpr()).getVariable().getName(), "foo");
  90     }
  91 
  92     @Test
  93     public void postDecrement() throws Exception {
  94         UnaryExpr tree = parseTreeFor("foo--");
  95         assertEquals(tree.getOp(), UnaryOpType.DEC);
  96         assertEquals(((VariableExpr)tree.getExpr()).getVariable().getName(), "foo");
  97     }
  98 
  99     @Test(expected = RecognitionException.class)
 100     public void notAUnaryExpression() throws Exception {
 101         parseTreeFor("^" + primary);
 102     }
 103 
 104     private UnaryExpr parseTreeFor(String text) throws RecognitionException {
 105         JSLParser parser = parserOver(text);
 106         parser.getSymbolTable().declareVariable("foo", Type.INT, null);
 107         parser.getSymbolTable().declareVariable("vec", Type.INT3, null);
 108         return (UnaryExpr)parser.unary_expression();
 109     }
 110 
 111     protected String unary() {
 112         return "(-" + primary() + ")";
 113     }
 114 }