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comparison: xpcom/tests/unit/test_seek_multiplex.js
xpcom/tests/unit/test_seek_multiplex.js
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| -1:000000000000 | 0:e7a976d16ecc |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 const Ci = Components.interfaces; | |
| 6 const Cr = Components.results; | |
| 7 const CC = Components.Constructor; | |
| 8 const Cc = Components.classes; | |
| 9 | |
| 10 // The string we use as data. | |
| 11 const data = "0123456789"; | |
| 12 // Number of streams in the multiplex stream. | |
| 13 const count = 10; | |
| 14 | |
| 15 function test_multiplex_streams() { | |
| 16 var MultiplexStream = CC("@mozilla.org/io/multiplex-input-stream;1", | |
| 17 "nsIMultiplexInputStream"); | |
| 18 do_check_eq(1, 1); | |
| 19 | |
| 20 var BinaryInputStream = Components.Constructor("@mozilla.org/binaryinputstream;1", | |
| 21 "nsIBinaryInputStream"); | |
| 22 var BinaryOutputStream = Components.Constructor("@mozilla.org/binaryoutputstream;1", | |
| 23 "nsIBinaryOutputStream", | |
| 24 "setOutputStream"); | |
| 25 var multiplex = new MultiplexStream(); | |
| 26 for (var i = 0; i < count; ++i) { | |
| 27 let s = Cc["@mozilla.org/io/string-input-stream;1"] | |
| 28 .createInstance(Ci.nsIStringInputStream); | |
| 29 s.setData(data, data.length); | |
| 30 | |
| 31 multiplex.appendStream(s); | |
| 32 } | |
| 33 var seekable = multiplex.QueryInterface(Ci.nsISeekableStream); | |
| 34 var sis = Cc["@mozilla.org/scriptableinputstream;1"] | |
| 35 .createInstance(Ci.nsIScriptableInputStream); | |
| 36 sis.init(seekable); | |
| 37 // Read some data. | |
| 38 var readData = sis.read(20); | |
| 39 do_check_eq(readData, data + data); | |
| 40 // -- Tests for NS_SEEK_SET | |
| 41 // Seek to a non-zero, non-stream-boundary offset. | |
| 42 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 2); | |
| 43 do_check_eq(seekable.tell(), 2); | |
| 44 do_check_eq(seekable.available(), 98); | |
| 45 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 9); | |
| 46 do_check_eq(seekable.tell(), 9); | |
| 47 do_check_eq(seekable.available(), 91); | |
| 48 // Seek across stream boundary. | |
| 49 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 35); | |
| 50 do_check_eq(seekable.tell(), 35); | |
| 51 do_check_eq(seekable.available(), 65); | |
| 52 readData = sis.read(5); | |
| 53 do_check_eq(readData, data.slice(5)); | |
| 54 do_check_eq(seekable.available(), 60); | |
| 55 // Seek at stream boundaries. | |
| 56 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 40); | |
| 57 do_check_eq(seekable.tell(), 40); | |
| 58 do_check_eq(seekable.available(), 60); | |
| 59 readData = sis.read(10); | |
| 60 do_check_eq(readData, data); | |
| 61 do_check_eq(seekable.tell(), 50); | |
| 62 do_check_eq(seekable.available(), 50); | |
| 63 // Rewind and read across streams. | |
| 64 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 39); | |
| 65 do_check_eq(seekable.tell(), 39); | |
| 66 do_check_eq(seekable.available(), 61); | |
| 67 readData = sis.read(11); | |
| 68 do_check_eq(readData, data.slice(9) + data); | |
| 69 do_check_eq(seekable.tell(), 50); | |
| 70 do_check_eq(seekable.available(), 50); | |
| 71 // Rewind to the beginning. | |
| 72 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0); | |
| 73 do_check_eq(seekable.tell(), 0); | |
| 74 do_check_eq(seekable.available(), 100); | |
| 75 // Seek to some random location | |
| 76 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 50); | |
| 77 // -- Tests for NS_SEEK_CUR | |
| 78 // Positive seek. | |
| 79 seekable.seek(Ci.nsISeekableStream.NS_SEEK_CUR, 15); | |
| 80 do_check_eq(seekable.tell(), 65); | |
| 81 do_check_eq(seekable.available(), 35); | |
| 82 readData = sis.read(10); | |
| 83 do_check_eq(readData, data.slice(5) + data.slice(0, 5)); | |
| 84 do_check_eq(seekable.tell(), 75); | |
| 85 do_check_eq(seekable.available(), 25); | |
| 86 // Negative seek. | |
| 87 seekable.seek(Ci.nsISeekableStream.NS_SEEK_CUR, -15); | |
| 88 do_check_eq(seekable.tell(), 60); | |
| 89 do_check_eq(seekable.available(), 40); | |
| 90 readData = sis.read(10); | |
| 91 do_check_eq(readData, data); | |
| 92 do_check_eq(seekable.tell(), 70); | |
| 93 do_check_eq(seekable.available(), 30); | |
| 94 | |
| 95 // -- Tests for NS_SEEK_END | |
| 96 // Normal read. | |
| 97 seekable.seek(Ci.nsISeekableStream.NS_SEEK_END, -5); | |
| 98 do_check_eq(seekable.tell(), data.length * count - 5); | |
| 99 readData = sis.read(5); | |
| 100 do_check_eq(readData, data.slice(5)); | |
| 101 do_check_eq(seekable.tell(), data.length * count); | |
| 102 // Read across streams. | |
| 103 seekable.seek(Ci.nsISeekableStream.NS_SEEK_END, -15); | |
| 104 do_check_eq(seekable.tell(), data.length * count - 15); | |
| 105 readData = sis.read(15); | |
| 106 do_check_eq(readData, data.slice(5) + data); | |
| 107 do_check_eq(seekable.tell(), data.length * count); | |
| 108 | |
| 109 // -- Try to do various edge cases | |
| 110 // Forward seek from the end, should throw. | |
| 111 var caught = false; | |
| 112 try { | |
| 113 seekable.seek(Ci.nsISeekableStream.NS_SEEK_END, 15); | |
| 114 } catch(e) { | |
| 115 caught = true; | |
| 116 } | |
| 117 do_check_eq(caught, true); | |
| 118 do_check_eq(seekable.tell(), data.length * count); | |
| 119 // Backward seek from the beginning, should be clamped. | |
| 120 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0); | |
| 121 do_check_eq(seekable.tell(), 0); | |
| 122 seekable.seek(Ci.nsISeekableStream.NS_SEEK_CUR, -15); | |
| 123 do_check_eq(seekable.tell(), 0); | |
| 124 // Seek too far: should be clamped. | |
| 125 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 0); | |
| 126 do_check_eq(seekable.tell(), 0); | |
| 127 seekable.seek(Ci.nsISeekableStream.NS_SEEK_CUR, 3 * data.length * count); | |
| 128 do_check_eq(seekable.tell(), 100); | |
| 129 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, data.length * count); | |
| 130 do_check_eq(seekable.tell(), 100); | |
| 131 seekable.seek(Ci.nsISeekableStream.NS_SEEK_CUR, -2 * data.length * count); | |
| 132 do_check_eq(seekable.tell(), 0); | |
| 133 } | |
| 134 | |
| 135 function test_multiplex_bug797871() { | |
| 136 | |
| 137 var data = "1234567890123456789012345678901234567890"; | |
| 138 | |
| 139 var MultiplexStream = CC("@mozilla.org/io/multiplex-input-stream;1", | |
| 140 "nsIMultiplexInputStream"); | |
| 141 do_check_eq(1, 1); | |
| 142 | |
| 143 var BinaryInputStream = Components.Constructor("@mozilla.org/binaryinputstream;1", | |
| 144 "nsIBinaryInputStream"); | |
| 145 var BinaryOutputStream = Components.Constructor("@mozilla.org/binaryoutputstream;1", | |
| 146 "nsIBinaryOutputStream", | |
| 147 "setOutputStream"); | |
| 148 var multiplex = new MultiplexStream(); | |
| 149 let s = Cc["@mozilla.org/io/string-input-stream;1"] | |
| 150 .createInstance(Ci.nsIStringInputStream); | |
| 151 s.setData(data, data.length); | |
| 152 | |
| 153 multiplex.appendStream(s); | |
| 154 | |
| 155 var seekable = multiplex.QueryInterface(Ci.nsISeekableStream); | |
| 156 var sis = Cc["@mozilla.org/scriptableinputstream;1"] | |
| 157 .createInstance(Ci.nsIScriptableInputStream); | |
| 158 sis.init(seekable); | |
| 159 | |
| 160 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 8); | |
| 161 do_check_eq(seekable.tell(), 8); | |
| 162 readData = sis.read(2); | |
| 163 do_check_eq(seekable.tell(), 10); | |
| 164 | |
| 165 seekable.seek(Ci.nsISeekableStream.NS_SEEK_SET, 20); | |
| 166 do_check_eq(seekable.tell(), 20); | |
| 167 } | |
| 168 | |
| 169 function run_test() { | |
| 170 test_multiplex_streams(); | |
| 171 test_multiplex_bug797871(); | |
| 172 } | |
| 173 |
