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110 lines
4.0 KiB
JavaScript
110 lines
4.0 KiB
JavaScript
/* Test case for bug 317216
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*
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* Uses nsIConverterInputStream to decode UTF-16 text with valid surrogate
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* pairs and lone surrogate characters
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*
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* Sample text is: "A" in Mathematical Bold Capitals (U+1D400)
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*
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* The test uses buffers of 4 different lengths to test end of buffer in mid-
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* UTF16 character and mid-surrogate pair
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*/
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const test = [
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// 0: Valid surrogate pair
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["%00%2D%00%2D%D8%35%DC%20%00%2D%00%2D",
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// expected: surrogate pair
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"--\uD835\uDC20--"],
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// 1: Lone high surrogate
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["%00%2D%00%2D%D8%35%00%2D%00%2D",
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// expected: one replacement char
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"--\uFFFD--"],
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// 2: Lone low surrogate
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["%00%2D%00%2D%DC%20%00%2D%00%2D",
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// expected: one replacement char
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"--\uFFFD--"],
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// 3: Two high surrogates
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["%00%2D%00%2D%D8%35%D8%35%00%2D%00%2D",
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// expected: two replacement chars
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"--\uFFFD\uFFFD--"],
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// 4: Two low surrogates
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["%00%2D%00%2D%DC%20%DC%20%00%2D%00%2D",
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// expected: two replacement chars
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"--\uFFFD\uFFFD--"],
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// 5: Low surrogate followed by high surrogate
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["%00%2D%00%2D%DC%20%D8%35%00%2D%00%2D",
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// expected: two replacement chars
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"--\uFFFD\uFFFD--"],
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// 6: Lone high surrogate followed by valid surrogate pair
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["%00%2D%00%2D%D8%35%D8%35%DC%20%00%2D%00%2D",
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// expected: replacement char followed by surrogate pair
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"--\uFFFD\uD835\uDC20--"],
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// 7: Lone low surrogate followed by valid surrogate pair
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["%00%2D%00%2D%DC%20%D8%35%DC%20%00%2D%00%2D",
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// expected: replacement char followed by surrogate pair
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"--\uFFFD\uD835\uDC20--"],
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// 8: Valid surrogate pair followed by lone high surrogate
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["%00%2D%00%2D%D8%35%DC%20%D8%35%00%2D%00%2D",
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// expected: surrogate pair followed by replacement char
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"--\uD835\uDC20\uFFFD--"],
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// 9: Valid surrogate pair followed by lone low surrogate
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["%00%2D%00%2D%D8%35%DC%20%DC%20%00%2D%00%2D",
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// expected: surrogate pair followed by replacement char
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"--\uD835\uDC20\uFFFD--"],
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// 10: Lone high surrogate at the end of the input
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["%00%2D%00%2D%00%2D%00%2D%D8%35%",
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// expected: nothing
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"----"],
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// 11: Half code unit at the end of the input
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["%00%2D%00%2D%00%2D%00%2D%D8",
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// expected: nothing
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"----"]];
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const IOService = Components.Constructor("@mozilla.org/network/io-service;1",
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"nsIIOService");
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const ConverterInputStream =
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Components.Constructor("@mozilla.org/intl/converter-input-stream;1",
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"nsIConverterInputStream",
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"init");
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const ios = new IOService();
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function testCase(testText, expectedText, bufferLength, charset)
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{
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var dataURI = "data:text/plain;charset=" + charset + "," + testText;
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var channel = ios.newChannel(dataURI, "", null);
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var testInputStream = channel.open();
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var testConverter = new ConverterInputStream(testInputStream,
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charset,
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bufferLength,
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0xFFFD);
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if (!(testConverter instanceof
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Components.interfaces.nsIUnicharLineInputStream))
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throw "not line input stream";
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var outStr = "";
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var more;
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do {
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// read the line and check for eof
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var line = {};
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more = testConverter.readLine(line);
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outStr += line.value;
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} while (more);
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// escape the strings before comparing for better readability
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do_check_eq(escape(outStr), escape(expectedText));
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}
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// Byte-swap %-encoded utf-16
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function flip(str) { return str.replace(/(%..)(%..)/g, "$2$1"); }
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function run_test()
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{
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for (var i = 0; i < 12; ++i) {
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for (var bufferLength = 4; bufferLength < 8; ++ bufferLength) {
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testCase(test[i][0], test[i][1], bufferLength, "UTF-16BE");
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testCase(flip(test[i][0]), test[i][1], bufferLength, "UTF-16LE");
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}
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}
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}
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