Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | function MaxLT(x, y) { |
| 29 | if (x < y) return y; |
| 30 | return x; |
| 31 | } |
| 32 | |
| 33 | function MaxLE(x, y) { |
| 34 | if (x <= y) return y; |
| 35 | return x; |
| 36 | } |
| 37 | |
| 38 | function MaxGE(x, y) { |
| 39 | if (x >= y) return x; |
| 40 | return y; |
| 41 | } |
| 42 | |
| 43 | function MaxGT(x, y) { |
| 44 | if (x > y) return x; |
| 45 | return y; |
| 46 | } |
| 47 | |
| 48 | |
| 49 | // First test primitive values. |
| 50 | function TestPrimitive(max, x, y) { |
| 51 | assertEquals(max, MaxLT(x, y), "MaxLT - primitive"); |
| 52 | assertEquals(max, MaxLE(x, y), "MaxLE - primitive"); |
| 53 | assertEquals(max, MaxGE(x, y), "MaxGE - primitive"); |
| 54 | assertEquals(max, MaxGT(x, y), "MaxGT - primitive"); |
| 55 | } |
| 56 | |
| 57 | TestPrimitive(1, 0, 1); |
| 58 | TestPrimitive(1, 1, 0); |
| 59 | TestPrimitive(4, 3, 4); |
| 60 | TestPrimitive(4, 4, 3); |
| 61 | TestPrimitive(0, -1, 0); |
| 62 | TestPrimitive(0, 0, -1) |
| 63 | TestPrimitive(-2, -2, -3); |
| 64 | TestPrimitive(-2, -3, -2); |
| 65 | |
| 66 | TestPrimitive(1, 0.1, 1); |
| 67 | TestPrimitive(1, 1, 0.1); |
| 68 | TestPrimitive(4, 3.1, 4); |
| 69 | TestPrimitive(4, 4, 3.1); |
| 70 | TestPrimitive(0, -1.1, 0); |
| 71 | TestPrimitive(0, 0, -1.1) |
| 72 | TestPrimitive(-2, -2, -3.1); |
| 73 | TestPrimitive(-2, -3.1, -2); |
| 74 | |
| 75 | |
| 76 | // Test non-primitive values and watch for valueOf call order. |
| 77 | function TestNonPrimitive(order, f) { |
| 78 | var result = ""; |
| 79 | var x = { valueOf: function() { result += "x"; } }; |
| 80 | var y = { valueOf: function() { result += "y"; } }; |
| 81 | f(x, y); |
| 82 | assertEquals(order, result); |
| 83 | } |
| 84 | |
| 85 | TestNonPrimitive("xy", MaxLT); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 86 | TestNonPrimitive("xy", MaxLE); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 87 | TestNonPrimitive("xy", MaxGE); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 88 | TestNonPrimitive("xy", MaxGT); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 89 | |
| 90 | // Test compare in case of aliased registers. |
| 91 | function CmpX(x) { if (x == x) return 42; } |
| 92 | assertEquals(42, CmpX(0)); |
| 93 | |
| 94 | function CmpXY(x) { var y = x; if (x == y) return 42; } |
| 95 | assertEquals(42, CmpXY(0)); |
| 96 | |
| 97 | |
| 98 | // Test compare against null. |
| 99 | function CmpNullValue(x) { return x == null; } |
| 100 | assertEquals(false, CmpNullValue(42)); |
| 101 | |
| 102 | function CmpNullTest(x) { if (x == null) return 42; return 0; } |
| 103 | assertEquals(42, CmpNullTest(null)); |
| 104 | |
| 105 | var g1 = 0; |
| 106 | function CmpNullEffect() { (g1 = 42) == null; } |
| 107 | CmpNullEffect(); |
| 108 | assertEquals(42, g1); |