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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.test.language;
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11
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12 import org.junit.*;
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13
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14 import com.oracle.truffle.ruby.test.*;
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15
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16 /**
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17 * Test that methods can be redefined.
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18 */
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19 public class RedefinitionTests extends RubyTests {
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20
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21 /**
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22 * Test that a method on Fixnum can be redefined and that we will use the new definition. The
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23 * call that expects to find the redefinition needs to have already been specialized, which is
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24 * why do it through a method.
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25 */
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26 @Test
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27 public void testSimpleOperatorRedefinition() {
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28 assertPrints("3\n-1\n", //
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29 "def add(x, y)\n" + //
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30 " x + y\n" + //
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31 "end\n" + //
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32 "puts add(1, 2)\n" + //
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33 "class Fixnum\n" + //
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34 " def +(other)\n" + //
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35 " self - other\n" + //
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36 " end\n" + //
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37 "end\n" + //
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38 "puts add(1, 2)\n");
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39 }
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40
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41 /**
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42 * This is quite a subtle test. We redefine Float#+. We have a method which calls +. It is
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43 * initially specialized to Fixnum, but then used with Float. The tricky bit is that Float has
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44 * not been redefined since the operator has been specialized. The operator thinks it is up to
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45 * date. When we emit a + node, we need to check if any class that that node could specialize to
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46 * has been redefined.
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47 */
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48 @Test
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49 public void testSpecialisationConsidersRedefinitionInOtherClasses() {
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50 assertPrints("16\n12.25\n", //
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51 "def add(a, b)\n" + //
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52 " a + b\n" + //
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53 "end\n" + //
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54 "class Float\n" + //
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55 " def +(other)\n" + //
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56 " self - other\n" + //
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57 " end\n" + //
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58 "end\n" + //
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59 "puts add(14, 2)\n" + //
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60 "puts add(14.5, 2.25)");
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61 }
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62
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63 }
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