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Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Fri, 22 May 2015 13:41:10 +0200
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children 3286fb5fea4a b1530a6cce8c
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1 /*
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2 * Copyright (c) 2012, 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.vm;
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24
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25 import com.oracle.truffle.api.vm.TruffleVM;
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26 import java.util.Random;
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27
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28 /**
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29 * A collection of tests that can certify language implementaiton to be complient with most recent
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30 * requirements of the Truffle infrastructure and tooling. Subclass, implement abstract methods and
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31 * include in your test suite.
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32 */
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33 public abstract class TruffleTCK {
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34 private TruffleVM vm;
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35
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36 protected TruffleTCK() {
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37 }
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38
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39 /**
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40 * This methods is called before first test is executed. It's purpose is to set a TruffleVM with
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41 * your language up, so it is ready for testing.
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42 * {@link TruffleVM#eval(java.lang.String, java.lang.String) Execute} any scripts you need, and
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43 * prepare global symbols with proper names. The symbols will then be looked up by the
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44 * infastructure (using the names provided by you from methods like {@link #plusInt()}) and used
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45 * for internal testing.
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46 *
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47 * @return initialized Truffle virtual machine
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48 */
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49 protected abstract TruffleVM prepareVM() throws Exception;
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50
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51 /**
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52 * Name of function which will return value 42 as a number. The return value of the method
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53 * should be instance of {@link Number} and its {@link Number#intValue()} should return
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54 * <code>42</code>.
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55 *
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56 * @return name of globally exported symbol
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57 */
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58 protected abstract String fourtyTwo();
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59
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60 /**
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61 * Name of function to add two integer values together. The symbol will be invoked with two
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62 * parameters of type {@link Integer} and expects result of type {@link Number} which's
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63 * {@link Number#intValue()} is equivalent of <code>param1 + param2</code>.
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64 *
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65 * @return name of globally exported symbol
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66 */
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67 protected abstract String plusInt();
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68
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69 private TruffleVM vm() throws Exception {
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70 if (vm == null) {
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71 vm = prepareVM();
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72 }
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73 return vm;
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74 }
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75
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76 //
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77 // The tests
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78 //
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79
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80 public void testFortyTwo() throws Exception {
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81 TruffleVM.Symbol fourtyTwo = findGlobalSymbol(fourtyTwo());
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82
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83 Object res = fourtyTwo.invoke(null);
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84
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85 assert res instanceof Number : "should yield a number, but was: " + res;
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86
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87 Number n = (Number) res;
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88
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89 assert 42 == n.intValue() : "The value is 42 = " + n.intValue();
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90 }
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91
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92 public void testPlusWithInts() throws Exception {
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93 Random r = new Random();
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94 int a = r.nextInt(100);
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95 int b = r.nextInt(100);
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96
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97 TruffleVM.Symbol plus = findGlobalSymbol(plusInt());
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98
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99 Object res = plus.invoke(null, a, b);
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100
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101 assert res instanceof Number : "+ on two ints should yield a number, but was: " + res;
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102
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103 Number n = (Number) res;
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104
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105 assert a + b == n.intValue() : "The value is correct: (" + a + " + " + b + ") = " + n.intValue();
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106 }
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107
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108 private TruffleVM.Symbol findGlobalSymbol(String name) throws Exception {
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109 TruffleVM.Symbol s = vm().findGlobalSymbol(name);
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110 assert s != null : "Symbol " + name + " is not found!";
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111 return s;
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112 }
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113 }