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diff --git a/layout/style/test/test_parser_diagnostics_unprintables.html b/layout/style/test/test_parser_diagnostics_unprintables.html new file mode 100644 index 0000000000..f872c00a8f --- /dev/null +++ b/layout/style/test/test_parser_diagnostics_unprintables.html @@ -0,0 +1,220 @@ +<!doctype html> +<html> +<head> + <meta charset="utf-8"> + <title>Test for CSS parser diagnostics escaping unprintable + characters correctly</title> + <script src="/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" href="/tests/SimpleTest/test.css"> +</head> +<body> +<a target="_blank" + href="https://bugzilla.mozilla.org/show_bug.cgi?id=229827" +>Mozilla Bug 229827</a> +<style id="testbench"></style> +<script type="application/javascript"> +// This test has intimate knowledge of how to get the CSS parser to +// emit diagnostics that contain text under control of the user. +// That's not the point of the test, though; the point is only that +// *that text* is properly escaped. + +SpecialPowers.wrap(window).docShell.cssErrorReportingEnabled = true; + +// There is one "pattern" for each code path through the error reporter +// that might need to escape some kind of user-supplied text. +// Each "pattern" is tested once with each of the "substitution"s below: +// <t>, <i>, and <s> are replaced by the t:, i:, and s: fields of +// each substitution object in turn. +let patterns = [ + // REPORT_UNEXPECTED_P (only ever used in contexts where identifier-like + // escaping is appropriate) + { i: "<t>|x{}", o: "prefix \u2018<i>\u2019" }, + // REPORT_UNEXPECTED_TOKEN with: + // _Ident + { i: "@namespace fnord <t>;", o: "within @namespace: \u2018<i>\u2019" }, + // _Ref + { i: "@namespace fnord #<t>;", o: "within @namespace: \u2018#<i>\u2019" }, + // _Function + { i: "@namespace fnord <t>();", o: "within @namespace: \u2018<i>(\u2019" }, + // _Dimension + { i: "@namespace fnord 14<t>;", o: "within @namespace: \u201814<i>\u2019" }, + // _AtKeyword + { i: "x{@<t>: }", o: "declaration but found \u2018@<i>\u2019." }, + // _String + { i: "x{ color: '<t>'}" , o: 'color but found \u2018"<s>"\u2019.' }, + // _Bad_String + { i: "x{ color: '<t>\n}", o: 'color but found \u2018"<s>\u2019.' }, +]; + +// Blocks of characters to test, and how they should be escaped when +// they appear in identifiers and string constants. +const substitutions = [ + // ASCII printables that _can_ normally appear in identifiers, + // so should of course _not_ be escaped. + { t: "-_0123456789", i: "-_0123456789", + s: "-_0123456789" }, + { t: "abcdefghijklmnopqrstuvwxyz", i: "abcdefghijklmnopqrstuvwxyz", + s: "abcdefghijklmnopqrstuvwxyz" }, + { t: "ABCDEFGHIJKLMNOPQRSTUVWXYZ", i: "ABCDEFGHIJKLMNOPQRSTUVWXYZ", + s: "ABCDEFGHIJKLMNOPQRSTUVWXYZ" }, + + // ASCII printables that are not normally valid as the first character + // of an identifier, or the character immediately after a leading dash, + // but can be forced into that position with escapes. + { t: "\\-", i: "\\-", s: "-" }, + { t: "\\30 ", i: "\\30 ", s: "0" }, + { t: "\\31 ", i: "\\31 ", s: "1" }, + { t: "\\32 ", i: "\\32 ", s: "2" }, + { t: "\\33 ", i: "\\33 ", s: "3" }, + { t: "\\34 ", i: "\\34 ", s: "4" }, + { t: "\\35 ", i: "\\35 ", s: "5" }, + { t: "\\36 ", i: "\\36 ", s: "6" }, + { t: "\\37 ", i: "\\37 ", s: "7" }, + { t: "\\38 ", i: "\\38 ", s: "8" }, + { t: "\\39 ", i: "\\39 ", s: "9" }, + { t: "-\\-", i: "--", s: "--" }, + { t: "-\\30 ", i: "-\\30 ", s: "-0" }, + { t: "-\\31 ", i: "-\\31 ", s: "-1" }, + { t: "-\\32 ", i: "-\\32 ", s: "-2" }, + { t: "-\\33 ", i: "-\\33 ", s: "-3" }, + { t: "-\\34 ", i: "-\\34 ", s: "-4" }, + { t: "-\\35 ", i: "-\\35 ", s: "-5" }, + { t: "-\\36 ", i: "-\\36 ", s: "-6" }, + { t: "-\\37 ", i: "-\\37 ", s: "-7" }, + { t: "-\\38 ", i: "-\\38 ", s: "-8" }, + { t: "-\\39 ", i: "-\\39 ", s: "-9" }, + + // ASCII printables that must be escaped in identifiers. + // Most of these should not be escaped in strings. + { t: "\\!\\\"\\#\\$", i: "\\!\\\"\\#\\$", s: "!\\\"#$" }, + { t: "\\%\\&\\'\\(", i: "\\%\\&\\'\\(", s: "%&'(" }, + { t: "\\)\\*\\+\\,", i: "\\)\\*\\+\\,", s: ")*+," }, + { t: "\\.\\/\\:\\;", i: "\\.\\/\\:\\;", s: "./:;" }, + { t: "\\<\\=\\>\\?", i: "\\<\\=\\>\\?", s: "<=>?", }, + { t: "\\@\\[\\\\\\]", i: "\\@\\[\\\\\\]", s: "@[\\\\]" }, + { t: "\\^\\`\\{\\}\\~", i: "\\^\\`\\{\\}\\~", s: "^`{}~" }, + + // U+0000 - U+0020 (C0 controls, space) + // U+000A LINE FEED, U+000C FORM FEED, and U+000D CARRIAGE RETURN + // cannot be put into a CSS token as escaped literal characters, so + // we do them with hex escapes instead. + // The parser replaces U+0000 with U+FFFD. + { t: "\\\x00\\\x01\\\x02\\\x03", i: "�\\1 \\2 \\3 ", + s: "�\\1 \\2 \\3 " }, + { t: "\\\x04\\\x05\\\x06\\\x07", i: "\\4 \\5 \\6 \\7 ", + s: "\\4 \\5 \\6 \\7 " }, + { t: "\\\x08\\\x09\\000A\\\x0B", i: "\\8 \\9 \\a \\b ", + s: "\\8 \\9 \\a \\b " }, + { t: "\\000C\\000D\\\x0E\\\x0F", i: "\\c \\d \\e \\f ", + s: "\\c \\d \\e \\f " }, + { t: "\\\x10\\\x11\\\x12\\\x13", i: "\\10 \\11 \\12 \\13 ", + s: "\\10 \\11 \\12 \\13 " }, + { t: "\\\x14\\\x15\\\x16\\\x17", i: "\\14 \\15 \\16 \\17 ", + s: "\\14 \\15 \\16 \\17 " }, + { t: "\\\x18\\\x19\\\x1A\\\x1B", i: "\\18 \\19 \\1a \\1b ", + s: "\\18 \\19 \\1a \\1b " }, + { t: "\\\x1C\\\x1D\\\x1E\\\x1F\\ ", i: "\\1c \\1d \\1e \\1f \\ ", + s: "\\1c \\1d \\1e \\1f " }, + + // U+007F (DELETE) and U+0080 - U+009F (C1 controls) + { t: "\\\x7f\\\x80\\\x81\\\x82", i: "\\7f \x80\x81\x82", + s: "\\7f \x80\x81\x82" }, + { t: "\\\x83\\\x84\\\x85\\\x86", i: "\x83\x84\x85\x86", + s: "\x83\x84\x85\x86" }, + { t: "\\\x87\\\x88\\\x89\\\x8A", i: "\x87\x88\x89\x8A", + s: "\x87\x88\x89\x8A" }, + { t: "\\\x8B\\\x8C\\\x8D\\\x8E", i: "\x8B\x8C\x8D\x8E", + s: "\x8B\x8C\x8D\x8E" }, + { t: "\\\x8F\\\x90\\\x91\\\x92", i: "\x8F\x90\x91\x92", + s: "\x8F\x90\x91\x92" }, + { t: "\\\x93\\\x94\\\x95\\\x96", i: "\x93\x94\x95\x96", + s: "\x93\x94\x95\x96" }, + { t: "\\\x97\\\x98\\\x99\\\x9A", i: "\x97\x98\x99\x9A", + s: "\x97\x98\x99\x9A" }, + { t: "\\\x9B\\\x9C\\\x9D\\\x9E\\\x9F", i: "\x9B\x9C\x9D\x9E\x9F", + s: "\x9B\x9C\x9D\x9E\x9F" }, + + // CSS doesn't bother with the full Unicode rules for identifiers, + // instead declaring that any code point greater than or equal to + // U+0080 is a valid identifier character. Test a small handful + // of both basic and astral plane characters. + + // Arabic (caution to editors: there is a possibly-invisible U+200E + // LEFT-TO-RIGHT MARK in each string, just before the close quote) + { t: "أبجدهوزحطيكلمنسعفصقرشتثخذضظغ", + i: "أبجدهوزحطيكلمنسعفصقرشتثخذضظغ", + s: "أبجدهوزحطيكلمنسعفصقرشتثخذضظغ" }, + + // Box drawing + { t: "─│┌┐└┘├┤┬┴┼╭╮╯╰╴╵╶╷", + i: "─│┌┐└┘├┤┬┴┼╭╮╯╰╴╵╶╷", + s: "─│┌┐└┘├┤┬┴┼╭╮╯╰╴╵╶╷" }, + + // CJK Unified Ideographs + { t: "一丁丂七丄丅丆万丈三上下丌不与丏", + i: "一丁丂七丄丅丆万丈三上下丌不与丏", + s: "一丁丂七丄丅丆万丈三上下丌不与丏" }, + + // CJK Unified Ideographs Extension B (astral) + { t: "𠀀𠀁𠀂𠀃𠀄𠀅𠀆𠀇𠀈𠀉𠀊𠀋𠀌𠀍𠀎𠀏", + i: "𠀀𠀁𠀂𠀃𠀄𠀅𠀆𠀇𠀈𠀉𠀊𠀋𠀌𠀍𠀎𠀏", + s: "𠀀𠀁𠀂𠀃𠀄𠀅𠀆𠀇𠀈𠀉𠀊𠀋𠀌𠀍𠀎𠀏" }, + + // Devanagari + { t: "कखगघङचछजझञटठडढणतथदधनपफबभमयरलळवशषसह", + i: "कखगघङचछजझञटठडढणतथदधनपफबभमयरलळवशषसह", + s: "कखगघङचछजझञटठडढणतथदधनपफबभमयरलळवशषसह" }, + + // Emoticons (astral) + { t: "😁😂😃😄😅😆😇😈😉😊😋😌😍😎😏😐", + i: "😁😂😃😄😅😆😇😈😉😊😋😌😍😎😏😐", + s: "😁😂😃😄😅😆😇😈😉😊😋😌😍😎😏😐" }, + + // Greek + { t: "αβγδεζηθικλμνξοπρςστυφχψω", + i: "αβγδεζηθικλμνξοπρςστυφχψω", + s: "αβγδεζηθικλμνξοπρςστυφχψω" } +]; + +const npatterns = patterns.length; +const nsubstitutions = substitutions.length; + +function quotemeta(str) { + return str.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&"); +} +function subst(str, sub) { + return str.replace("<t>", sub.t) + .replace("<i>", sub.i) + .replace("<s>", sub.s); +} + +var curpat = 0; +var cursubst = -1; +var testbench = document.getElementById("testbench"); + +function nextTest() { + cursubst++; + if (cursubst == nsubstitutions) { + curpat++; + cursubst = 0; + } + if (curpat == npatterns) { + SimpleTest.finish(); + return; + } + + let css = subst(patterns[curpat].i, substitutions[cursubst]); + let msg = quotemeta(subst(patterns[curpat].o, substitutions[cursubst])); + + info(css); + info(msg); + SimpleTest.expectConsoleMessages(function () { testbench.innerHTML = css }, + [{ errorMessage: new RegExp(msg) }], + nextTest); +} + +SimpleTest.waitForExplicitFinish(); +nextTest(); +</script> +</body> +</html> |