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improve parser under "use strict" (#1836)

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- `const` without value
- `delete` of expression
- redefining `arguments` or `eval`

extend `test/ufuzz.js`
- optionally generate "use strict"
- improve handling of test cases with syntax errors
- group IIFE generation
- generate bare anonymous functions
- workaround `console.log()` for `new function()`
- generate expressions with `this`


fixes #1810
This commit is contained in:
Alex Lam S.L
2017-04-23 20:05:22 +08:00
committed by GitHub
parent 64d74432f6
commit 9bf72cf758
11 changed files with 333 additions and 69 deletions
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105
test/mocha/cli.js
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@@ -379,6 +379,111 @@ describe("bin/uglifyjs", function () {
done();
});
});
it("Should throw syntax error (const a)", function(done) {
var command = uglifyjscmd + ' test/input/invalid/const.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/const.js:7,11",
" const a;",
" ^",
"ERROR: Missing initializer in const declaration"
].join("\n"));
done();
});
});
it("Should throw syntax error (delete x)", function(done) {
var command = uglifyjscmd + ' test/input/invalid/delete.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/delete.js:13,11",
" delete x;",
" ^",
"ERROR: Calling delete on expression not allowed in strict mode"
].join("\n"));
done();
});
});
it("Should throw syntax error (function g(arguments))", function(done) {
var command = uglifyjscmd + ' test/input/invalid/function_1.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/function_1.js:4,11",
"function g(arguments) {",
" ^",
"ERROR: Unexpected arguments in strict mode"
].join("\n"));
done();
});
});
it("Should throw syntax error (function eval())", function(done) {
var command = uglifyjscmd + ' test/input/invalid/function_2.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/function_2.js:4,9",
"function eval() {",
" ^",
"ERROR: Unexpected eval in strict mode"
].join("\n"));
done();
});
});
it("Should throw syntax error (iife arguments())", function(done) {
var command = uglifyjscmd + ' test/input/invalid/function_3.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/function_3.js:4,10",
"!function arguments() {",
" ^",
"ERROR: Unexpected arguments in strict mode"
].join("\n"));
done();
});
});
it("Should throw syntax error (catch(eval))", function(done) {
var command = uglifyjscmd + ' test/input/invalid/try.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/try.js:7,18",
" try {} catch (eval) {}",
" ^",
"ERROR: Unexpected eval in strict mode"
].join("\n"));
done();
});
});
it("Should throw syntax error (var eval)", function(done) {
var command = uglifyjscmd + ' test/input/invalid/var.js';
exec(command, function (err, stdout, stderr) {
assert.ok(err);
assert.strictEqual(stdout, "");
assert.strictEqual(stderr.split(/\n/).slice(0, 4).join("\n"), [
"Parse error at test/input/invalid/var.js:7,8",
" var eval;",
" ^",
"ERROR: Unexpected eval in strict mode"
].join("\n"));
done();
});
});
it("Should handle literal string as source map input", function(done) {
var command = [
uglifyjscmd,