83 lines
3.1 KiB
JavaScript
83 lines
3.1 KiB
JavaScript
var assert = require("assert");
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var UglifyJS = require("../node");
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describe("generator", function() {
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it("Should reject `yield` as symbol name within generator functions only", function() {
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[
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"function yield() {}",
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"function(yield) {}",
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"function() { yield: {} }",
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"function() { var yield; }",
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"function() { function yield() {} }",
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"function() { try {} catch (yield) {} }",
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].forEach(function(code) {
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var ast = UglifyJS.parse("(" + code + ")();");
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assert.strictEqual(ast.TYPE, "Toplevel");
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assert.strictEqual(ast.body.length, 1);
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assert.strictEqual(ast.body[0].TYPE, "SimpleStatement");
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assert.strictEqual(ast.body[0].body.TYPE, "Call");
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assert.strictEqual(ast.body[0].body.expression.TYPE, "Function");
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assert.throws(function() {
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UglifyJS.parse("(" + code.replace(/^function/, "function*") + ")();");
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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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it("Should reject `yield` expression outside of generator functions", function() {
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[
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"yield 42;",
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"function f() { yield 42; }",
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"function* f() { function g() { yield 42; } }",
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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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it("Should reject `yield` expression directly on computed key of function argument", function() {
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[
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"function f({ [yield 42]: a }) {}",
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"function* f({ [yield 42]: a }) {}",
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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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it("Should accept `yield` expression nested within computed key of function argument", function() {
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[
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"function f({ [function*() { yield 42; }()]: a }) {}",
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"function* f({ [function*() { yield 42; }()]: a }) {}",
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].forEach(function(code) {
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var ast = UglifyJS.parse(code);
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assert.strictEqual(ast.TYPE, "Toplevel");
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assert.strictEqual(ast.body.length, 1);
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assert.strictEqual(ast.body[0].argnames.length, 1);
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assert.strictEqual(ast.body[0].argnames[0].TYPE, "DestructuredObject");
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});
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});
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it("Should reject `yield*` without an expression", function() {
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[
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"yield*",
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"yield*;",
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"yield*,",
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"(yield*)",
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"[ yield* ]",
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"42[yield*]",
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"yield* && 42",
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].forEach(function(code) {
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code = "function* f() { " + 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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