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annotate graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/nodes/SafeReplaceTest.java @ 19050:75da87c96605
initial commit of GraphBuilderPhase plugins
author | Doug Simon <doug.simon@oracle.com> |
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date | Sat, 31 Jan 2015 00:30:00 +0100 |
parents | 867058575979 |
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1 /* |
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.api.test.nodes; |
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24 |
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25 import static org.junit.Assert.*; |
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26 |
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27 import org.junit.*; |
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28 |
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29 import com.oracle.truffle.api.frame.*; |
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30 import com.oracle.truffle.api.nodes.*; |
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31 |
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32 /** |
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33 * Tests optional method for ensuring that a node replacement is type safe. Ordinary node |
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34 * replacement is performed by unsafe assignment of a parent node's child field. |
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35 */ |
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36 public class SafeReplaceTest { |
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37 |
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38 @Test |
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39 public void testCorrectReplacement() { |
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40 TestRootNode root = new TestRootNode(); |
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41 final TestNode oldChild = new TestNode(); |
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42 root.child = oldChild; |
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43 assertFalse(oldChild.isReplaceable()); // No parent node |
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44 root.adoptChildren(); |
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45 assertTrue(oldChild.isReplaceable()); // Now adopted by parent |
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46 final TestNode newChild = new TestNode(); |
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47 assertTrue(oldChild.isSafelyReplaceableBy(newChild)); // Parent field type is assignable by |
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48 // new node |
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49 oldChild.replace(newChild); |
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50 root.execute(null); |
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51 assertEquals(root.executed, 1); |
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52 assertEquals(oldChild.executed, 0); |
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53 assertEquals(newChild.executed, 1); |
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54 } |
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55 |
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56 @Test |
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57 public void testIncorrectReplacement() { |
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58 TestRootNode root = new TestRootNode(); |
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59 final TestNode oldChild = new TestNode(); |
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60 root.child = oldChild; |
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61 root.adoptChildren(); |
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62 final WrongTestNode newChild = new WrongTestNode(); |
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63 assertFalse(oldChild.isSafelyReplaceableBy(newChild)); |
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64 // Can't test: oldChild.replace(newChild); |
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65 // Fails if assertions checked; else unsafe assignment will eventually crash the VM |
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66 } |
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67 |
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68 private static class TestNode extends Node { |
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69 |
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70 private int executed; |
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71 |
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72 public Object execute() { |
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73 executed++; |
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74 return null; |
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75 } |
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76 } |
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77 |
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78 private static class TestRootNode extends RootNode { |
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79 |
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80 @Child TestNode child; |
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81 |
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82 private int executed; |
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83 |
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84 @Override |
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85 public Object execute(VirtualFrame frame) { |
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86 executed++; |
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87 child.execute(); |
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88 return null; |
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89 } |
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90 } |
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91 |
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92 private static class WrongTestNode extends Node { |
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93 } |
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94 |
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95 } |