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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// This test case is weird in the sense the actual work happens at the eval
// at the end. If template strings are not enabled, the test cases would throw
// a syntax error and we'd have failure reported. To avoid that, the entire
// test case is commented out and is part of a function. We use toString to
// get the string version, obtain the actual lines to run, and then use eval to
// do the actual evaluation.
function syntaxError (script) {
try {
Function(script);
} catch (e) {
if (e.name === "SyntaxError") {
return;
}
}
throw new Error('Expected syntax error: ' + script);
}
// function definitions
function check(actual, expected) {
assertEq(actual.length, expected.length);
for (var i = 0; i < expected.length; i++)
assertEq(actual[i], expected[i]);
}
function cooked(cs) { return cs; }
function raw(cs) { return cs.raw; }
function args(cs, ...rest) { return rest; }
// TEST BEGIN
// Literals
check(raw``, [""]);
check(raw`${4}a`, ["","a"]);
check(raw`${4}`, ["",""]);
check(raw`a${4}`, ["a",""]);
check(raw`a${4}b`, ["a","b"]);
check(raw`a${4}b${3}`, ["a","b",""]);
check(raw`a${4}b${3}c`, ["a","b","c"]);
check(raw`a${4}${3}c`, ["a","","c"]);
check(raw`${4}${3}`, ["","",""]);
check(raw`${4}\r\r${3}`, ["","\\r\\r",""]);
check(raw`${4}${3}c`, ["","","c"]);
check(raw`zyx${4}wvut${3}c`, ["zyx","wvut","c"]);
check(raw`zyx${4}wvut${3}\r\n`, ["zyx","wvut","\\r\\n"]);
check(raw`hey`, ["hey"]);
check(raw`he\r\ny`, ["he\\r\\ny"]);
check(raw`he\ry`, ["he\\ry"]);
check(raw`he\r\ry`, ["he\\r\\ry"]);
check(raw`he\ny`, ["he\\ny"]);
check(raw`he\n\ny`, ["he\\n\\ny"]);
check(cooked`hey`, ["hey"]);
check(cooked`he\r\ny`, ["he\r\ny"]);
check(cooked`he\ry`, ["he\ry"]);
check(cooked`he\r\ry`, ["he\r\ry"]);
check(cooked`he\ny`, ["he\ny"]);
check(cooked`he\n\ny`, ["he\n\ny"]);
check(eval("raw`\r`"), ["\n"]);
check(eval("raw`\r\n`"), ["\n"]);
check(eval("raw`\r\r\n`"), ["\n\n"]);
check(eval("raw`he\r\ny`"), ["he\ny"]);
check(eval("raw`he\ry`"), ["he\ny"]);
check(eval("raw`he\r\ry`"), ["he\n\ny"]);
check(eval("raw`he\r\r\ny`"), ["he\n\ny"]);
check(eval("cooked`\r`"), ["\n"]);
check(eval("cooked`\r\n`"), ["\n"]);
check(eval("cooked`\r\r\n`"), ["\n\n"]);
check(eval("cooked`he\r\ny`"), ["he\ny"]);
check(eval("cooked`he\ry`"), ["he\ny"]);
check(eval("cooked`he\r\ry`"), ["he\n\ny"]);
check(eval("cooked`he\r\r\ny`"), ["he\n\ny"]);
// Expressions
check(args`hey${"there"}now`, ["there"]);
check(args`hey${4}now`, [4]);
check(args`hey${4}`, [4]);
check(args`${4}`, [4]);
check(args`${4}${5}`, [4,5]);
check(args`a${4}${5}`, [4,5]);
check(args`a${4}b${5}`, [4,5]);
check(args`a${4}b${5}c`, [4,5]);
check(args`${4}b${5}c`, [4,5]);
check(args`${4}${5}c`, [4,5]);
var a = 10;
var b = 15;
check(args`${4 + a}${5 + b}c`, [14,20]);
check(args`${4 + a}${a + b}c`, [14,25]);
check(args`${b + a}${5 + b}c`, [25,20]);
check(args`${4 + a}${a + b}c${"a"}`, [14,25,"a"]);
check(args`a${"b"}${"c"}${"d"}`, ["b","c","d"]);
check(args`a${"b"}${"c"}${a + b}`, ["b","c",25]);
check(args`a${"b"}`, ["b"]);
// Expressions - complex substitutions
check(args`${`hey ${b + a} there`}${5 + b}c`, ["hey 25 there",20]);
check(args`${`hey ${`my ${b + a} good`} there`}${5 + b}c`, ["hey my 25 good there",20]);
syntaxError("args`${}`");
syntaxError("args`${`");
syntaxError("args`${\\n}`");
syntaxError("args`${yield 0}`");
syntaxError("args`");
syntaxError("args`$");
syntaxError("args`${");
syntaxError("args.``");
// Template substitution tests in the context of tagged templates
// Extra whitespace inside a template substitution is ignored.
check(args`a${
0
}`, [0]);
// Extra whitespace between tag and template is ignored
check(args
`a
${
0
}`, [0]);
check(args`${5}${ // Comments work in template substitutions.
// Even comments that look like code:
// 0}`, "FAIL"); /* NOTE: This whole line is a comment.
0}`, [5,0]);
check(args // Comments work in template substitutions.
// Even comments that look like code:
// 0}`, "FAIL"); /* NOTE: This whole line is a comment.
`${5}${0}`, [5,0]);
// Template substitutions are expressions, not statements.
syntaxError("args`${0;}`");
check(args`${
function f() {
return "ok";
}()
}`, ["ok"]);
// Template substitutions can have side effects.
var x = 0;
check(args`${x += 1}`, [1]);
assertEq(x, 1);
// The production for a template substitution is Expression, not
// AssignmentExpression.
x = 0;
check(args`${++x, "o"}k`, ["o"]);
assertEq(x, 1);
// --> is not a comment inside a template.
check(cooked`
--> this is text
`, ["\n--> this is text\n"]);
// reentrancy
function f(n) {
if (n === 0)
return "";
var res = args`${n}${f(n - 1)}`;
return res[0] + res[1] + "";
}
assertEq(f(9), "987654321");
// Template string substitutions in generator functions can yield.
function* g() {
var res = args`${yield 1} ${yield 2}`;
return res[0] + res[1] + "";
}
var it = g();
var next = it.next();
assertEq(next.done, false);
assertEq(next.value, 1);
next = it.next("hello");
assertEq(next.done, false);
assertEq(next.value, 2);
next = it.next("world");
assertEq(next.done, true);
assertEq(next.value, "helloworld");
// undefined
assertEq(args`${void 0}`[0] + "", "undefined");
assertEq(args`${Object.doesNotHaveThisProperty}`[0] + "", "undefined");
var callSiteObj = [];
callSiteObj[0] = cooked`aa${4}bb`;
for (var i = 1; i < 3; i++)
callSiteObj[i] = cooked`aa${4}bb`;
// Same call site object behavior
assertEq(callSiteObj[1], callSiteObj[2]);
// Template objects are canonicalized
assertEq(callSiteObj[0] !== callSiteObj[1], true);
assertEq("raw" in callSiteObj[0], true);
// Array length
assertEq(callSiteObj[0].raw.length, 2);
assertEq(callSiteObj[0].length, 2);
// Frozen objects
assertEq(Object.isFrozen(callSiteObj[0]), true);
assertEq(Object.isFrozen(callSiteObj[0].raw), true);
// Raw not enumerable
assertEq(callSiteObj[0].propertyIsEnumerable(callSiteObj[0].raw), false);
// Allow call syntax
check(new ((cs, sub) => function(){ return sub }) `${[1, 2, 3]}`, [1,2,3]);
var a = [];
function test() {
var x = callSite => callSite;
for (var i = 0; i < 2; i++)
a[i] = eval("x``");
}
test();
assertEq(a[0] !== a[1], true);
// Test that |obj.method`template`| works
var newObj = {
methodRetThis : function () {
return this;
},
methodRetCooked : function (a) {
return a;
},
methodRetRaw : function (a) {
return a.raw;
},
methodRetArgs : function (a, ...args) {
return args;
}
}
assertEq(newObj.methodRetThis`abc${4}`, newObj);
check(newObj.methodRetCooked`abc${4}\r`, ["abc","\r"]);
check(eval("newObj.methodRetCooked`abc${4}\r`"), ["abc","\n"]);
check(newObj.methodRetRaw`abc${4}\r`, ["abc","\\r"]);
check(eval("newObj.methodRetRaw`abc${4}\r`"), ["abc","\n"]);
check(eval("newObj.methodRetArgs`abc${4}${5}\r${6}`"), [4,5,6]);
// Chained calls
function func(a) {
if (a[0] === "hey") {
return function(a) {
if (a[0] === "there") {
return function(a) {
if (a[0] === "mine")
return "was mine";
else
return "was not mine";
}
} else {
return function(a) {
return "was not there";
}
}
}
} else {
return function(a) {
return function(a) {
return "was not hey";
}
}
}
}
assertEq(func`hey``there``mine`, "was mine");
assertEq(func`hey``there``amine`, "was not mine");
assertEq(func`hey``tshere``amine`, "was not there");
assertEq(func`heys``there``mine`, "was not hey");
// String.raw
assertEq(String.raw`h\r\ney${4}there\n`, "h\\r\\ney4there\\n");
assertEq(String.raw`hey`, "hey");
assertEq(String.raw``, "");
// Invalid escape sequences
check(raw`\01`, ["\\01"]);
check(raw`\01${0}right`, ["\\01","right"]);
check(raw`left${0}\01`, ["left","\\01"]);
check(raw`left${0}\01${1}right`, ["left","\\01","right"]);
check(raw`\1`, ["\\1"]);
check(raw`\1${0}right`, ["\\1","right"]);
check(raw`left${0}\1`, ["left","\\1"]);
check(raw`left${0}\1${1}right`, ["left","\\1","right"]);
check(raw`\xg`, ["\\xg"]);
check(raw`\xg${0}right`, ["\\xg","right"]);
check(raw`left${0}\xg`, ["left","\\xg"]);
check(raw`left${0}\xg${1}right`, ["left","\\xg","right"]);
check(raw`\xAg`, ["\\xAg"]);
check(raw`\xAg${0}right`, ["\\xAg","right"]);
check(raw`left${0}\xAg`, ["left","\\xAg"]);
check(raw`left${0}\xAg${1}right`, ["left","\\xAg","right"]);
check(raw`\u0`, ["\\u0"]);
check(raw`\u0${0}right`, ["\\u0","right"]);
check(raw`left${0}\u0`, ["left","\\u0"]);
check(raw`left${0}\u0${1}right`, ["left","\\u0","right"]);
check(raw`\u0g`, ["\\u0g"]);
check(raw`\u0g${0}right`, ["\\u0g","right"]);
check(raw`left${0}\u0g`, ["left","\\u0g"]);
check(raw`left${0}\u0g${1}right`, ["left","\\u0g","right"]);
check(raw`\u00g`, ["\\u00g"]);
check(raw`\u00g${0}right`, ["\\u00g","right"]);
check(raw`left${0}\u00g`, ["left","\\u00g"]);
check(raw`left${0}\u00g${1}right`, ["left","\\u00g","right"]);
check(raw`\u000g`, ["\\u000g"]);
check(raw`\u000g${0}right`, ["\\u000g","right"]);
check(raw`left${0}\u000g`, ["left","\\u000g"]);
check(raw`left${0}\u000g${1}right`, ["left","\\u000g","right"]);
check(raw`\u{}`, ["\\u{}"]);
check(raw`\u{}${0}right`, ["\\u{}","right"]);
check(raw`left${0}\u{}`, ["left","\\u{}"]);
check(raw`left${0}\u{}${1}right`, ["left","\\u{}","right"]);
check(raw`\u{-0}`, ["\\u{-0}"]);
check(raw`\u{-0}${0}right`, ["\\u{-0}","right"]);
check(raw`left${0}\u{-0}`, ["left","\\u{-0}"]);
check(raw`left${0}\u{-0}${1}right`, ["left","\\u{-0}","right"]);
check(raw`\u{g}`, ["\\u{g}"]);
check(raw`\u{g}${0}right`, ["\\u{g}","right"]);
check(raw`left${0}\u{g}`, ["left","\\u{g}"]);
check(raw`left${0}\u{g}${1}right`, ["left","\\u{g}","right"]);
check(raw`\u{0`, ["\\u{0"]);
check(raw`\u{0${0}right`, ["\\u{0","right"]);
check(raw`left${0}\u{0`, ["left","\\u{0"]);
check(raw`left${0}\u{0${1}right`, ["left","\\u{0","right"]);
check(raw`\u{\u{0}`, ["\\u{\\u{0}"]);
check(raw`\u{\u{0}${0}right`, ["\\u{\\u{0}","right"]);
check(raw`left${0}\u{\u{0}`, ["left","\\u{\\u{0}"]);
check(raw`left${0}\u{\u{0}${1}right`, ["left","\\u{\\u{0}","right"]);
check(raw`\u{110000}`, ["\\u{110000}"]);
check(raw`\u{110000}${0}right`, ["\\u{110000}","right"]);
check(raw`left${0}\u{110000}`, ["left","\\u{110000}"]);
check(raw`left${0}\u{110000}${1}right`, ["left","\\u{110000}","right"]);
check(cooked`\01`, [void 0]);
check(cooked`\01${0}right`, [void 0,"right"]);
check(cooked`left${0}\01`, ["left",void 0]);
check(cooked`left${0}\01${1}right`, ["left",void 0,"right"]);
check(cooked`\1`, [void 0]);
check(cooked`\1${0}right`, [void 0,"right"]);
check(cooked`left${0}\1`, ["left",void 0]);
check(cooked`left${0}\1${1}right`, ["left",void 0,"right"]);
check(cooked`\xg`, [void 0]);
check(cooked`\xg${0}right`, [void 0,"right"]);
check(cooked`left${0}\xg`, ["left",void 0]);
check(cooked`left${0}\xg${1}right`, ["left",void 0,"right"]);
check(cooked`\xAg`, [void 0]);
check(cooked`\xAg${0}right`, [void 0,"right"]);
check(cooked`left${0}\xAg`, ["left",void 0]);
check(cooked`left${0}\xAg${1}right`, ["left",void 0,"right"]);
check(cooked`\u0`, [void 0]);
check(cooked`\u0${0}right`, [void 0,"right"]);
check(cooked`left${0}\u0`, ["left",void 0]);
check(cooked`left${0}\u0${1}right`, ["left",void 0,"right"]);
check(cooked`\u0g`, [void 0]);
check(cooked`\u0g${0}right`, [void 0,"right"]);
check(cooked`left${0}\u0g`, ["left",void 0]);
check(cooked`left${0}\u0g${1}right`, ["left",void 0,"right"]);
check(cooked`\u00g`, [void 0]);
check(cooked`\u00g${0}right`, [void 0,"right"]);
check(cooked`left${0}\u00g`, ["left",void 0]);
check(cooked`left${0}\u00g${1}right`, ["left",void 0,"right"]);
check(cooked`\u000g`, [void 0]);
check(cooked`\u000g${0}right`, [void 0,"right"]);
check(cooked`left${0}\u000g`, ["left",void 0]);
check(cooked`left${0}\u000g${1}right`, ["left",void 0,"right"]);
check(cooked`\u{}`, [void 0]);
check(cooked`\u{}${0}right`, [void 0,"right"]);
check(cooked`left${0}\u{}`, ["left",void 0]);
check(cooked`left${0}\u{}${1}right`, ["left",void 0,"right"]);
check(cooked`\u{-0}`, [void 0]);
check(cooked`\u{-0}${0}right`, [void 0,"right"]);
check(cooked`left${0}\u{-0}`, ["left",void 0]);
check(cooked`left${0}\u{-0}${1}right`, ["left",void 0,"right"]);
check(cooked`\u{g}`, [void 0]);
check(cooked`\u{g}${0}right`, [void 0,"right"]);
check(cooked`left${0}\u{g}`, ["left",void 0]);
check(cooked`left${0}\u{g}${1}right`, ["left",void 0,"right"]);
check(cooked`\u{0`, [void 0]);
check(cooked`\u{0${0}right`, [void 0,"right"]);
check(cooked`left${0}\u{0`, ["left",void 0]);
check(cooked`left${0}\u{0${1}right`, ["left",void 0,"right"]);
check(cooked`\u{\u{0}`, [void 0]);
check(cooked`\u{\u{0}${0}right`, [void 0,"right"]);
check(cooked`left${0}\u{\u{0}`, ["left",void 0]);
check(cooked`left${0}\u{\u{0}${1}right`, ["left",void 0,"right"]);
check(cooked`\u{110000}`, [void 0]);
check(cooked`\u{110000}${0}right`, [void 0,"right"]);
check(cooked`left${0}\u{110000}`, ["left",void 0]);
check(cooked`left${0}\u{110000}${1}right`, ["left",void 0,"right"]);
syntaxError("`\\01`");
syntaxError("`\\01${0}right`");
syntaxError("`left${0}\\01`");
syntaxError("`left${0}\\01${1}right`");
syntaxError("`\\1`");
syntaxError("`\\1${0}right`");
syntaxError("`left${0}\\1`");
syntaxError("`left${0}\\1${1}right`");
syntaxError("`\\xg`");
syntaxError("`\\xg${0}right`");
syntaxError("`left${0}\\xg`");
syntaxError("`left${0}\\xg${1}right`");
syntaxError("`\\xAg`");
syntaxError("`\\xAg${0}right`");
syntaxError("`left${0}\\xAg`");
syntaxError("`left${0}\\xAg${1}right`");
syntaxError("`\\u0`");
syntaxError("`\\u0${0}right`");
syntaxError("`left${0}\\u0`");
syntaxError("`left${0}\\u0${1}right`");
syntaxError("`\\u0g`");
syntaxError("`\\u0g${0}right`");
syntaxError("`left${0}\\u0g`");
syntaxError("`left${0}\\u0g${1}right`");
syntaxError("`\\u00g`");
syntaxError("`\\u00g${0}right`");
syntaxError("`left${0}\\u00g`");
syntaxError("`left${0}\\u00g${1}right`");
syntaxError("`\\u000g`");
syntaxError("`\\u000g${0}right`");
syntaxError("`left${0}\\u000g`");
syntaxError("`left${0}\\u000g${1}right`");
syntaxError("`\\u{}`");
syntaxError("`\\u{}${0}right`");
syntaxError("`left${0}\\u{}`");
syntaxError("`left${0}\\u{}${1}right`");
syntaxError("`\\u{-0}`");
syntaxError("`\\u{-0}${0}right`");
syntaxError("`left${0}\\u{-0}`");
syntaxError("`left${0}\\u{-0}${1}right`");
syntaxError("`\\u{g}`");
syntaxError("`\\u{g}${0}right`");
syntaxError("`left${0}\\u{g}`");
syntaxError("`left${0}\\u{g}${1}right`");
syntaxError("`\\u{0`");
syntaxError("`\\u{0${0}right`");
syntaxError("`left${0}\\u{0`");
syntaxError("`left${0}\\u{0${1}right`");
syntaxError("`\\u{\\u{0}`");
syntaxError("`\\u{\\u{0}${0}right`");
syntaxError("`left${0}\\u{\\u{0}`");
syntaxError("`left${0}\\u{\\u{0}${1}right`");
syntaxError("`\\u{110000}`");
syntaxError("`\\u{110000}${0}right`");
syntaxError("`left${0}\\u{110000}`");
syntaxError("`left${0}\\u{110000}${1}right`");
reportCompare(0, 0, "ok");