98 lines
3.1 KiB
JavaScript
98 lines
3.1 KiB
JavaScript
var assert = require("assert");
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var UglifyJS = require("../node");
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describe("let", function() {
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this.timeout(30000);
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it("Should not produce reserved keywords as variable name in mangle", function() {
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// Produce a lot of variables in a function and run it through mangle.
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var s = '"dddddeeeeelllllooooottttt"; function foo() {';
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for (var i = 0; i < 18000; i++) {
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s += "var v" + i + "=[];";
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}
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s += '}';
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var result = UglifyJS.minify(s, {
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compress: false,
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});
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if (result.error) throw result.error;
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// Verify that select keywords and reserved keywords not produced
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[
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"do",
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"let",
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"var",
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].forEach(function(name) {
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assert.strictEqual(result.code.indexOf("var " + name + "="), -1);
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});
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// Verify that the variable names that appeared immediately before
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// and after the erroneously generated variable name still exist
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// to show the test generated enough symbols.
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[
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"to", "eo",
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"eet", "fet",
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"rar", "oar",
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].forEach(function(name) {
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assert.notStrictEqual(result.code.indexOf("var " + name + "="), -1);
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});
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});
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it("Should quote mangled properties that are reserved keywords", function() {
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var s = '"rrrrrnnnnniiiiiaaaaa";';
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for (var i = 0; i < 18000; i++) {
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s += "v.b" + i + "=v;";
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}
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var result = UglifyJS.minify(s, {
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compress: false,
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ie: true,
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mangle: {
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properties: {
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domprops: true,
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},
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},
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});
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if (result.error) throw result.error;
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[
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"in",
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"var",
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].forEach(function(name) {
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assert.notStrictEqual(result.code.indexOf('v["' + name + '"]'), -1);
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});
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});
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it("Should parse `let` as name correctly", function() {
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[
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"for(var let;let;let)let;",
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"function let(let){let}",
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].forEach(function(code) {
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var ast = UglifyJS.parse(code);
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assert.strictEqual(ast.print_to_string(), code);
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assert.throws(function() {
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UglifyJS.parse('"use strict";' + code);
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}, function(e) {
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return e instanceof UglifyJS.JS_Parse_Error && e.message == "Unexpected let in strict mode";
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}, code);
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});
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});
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it("Should throw on ambiguous use of `let`", function() {
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[
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"export let",
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[
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"let",
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"console.log(42)",
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].join("\n"),
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[
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"let",
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"[ console.log(42) ]",
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].join("\n"),
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[
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"let",
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"{",
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" console.log(42)",
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"}",
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].join("\n"),
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].forEach(function(code) {
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assert.throws(function() {
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UglifyJS.parse(code);
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}, function(e) {
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return e instanceof UglifyJS.JS_Parse_Error;
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}, code);
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});
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});
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});
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