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var assert = require("assert");
var UglifyJS = require("../node");
describe("async", function() {
it("Should reject `await` as symbol name within async functions only", function() {
[
"function await() {}",
"function(await) {}",
"function() { await; }",
"function() { await:{} }",
"function() { var await; }",
"function() { function await() {} }",
"function() { try {} catch (await) {} }",
].forEach(function(code) {
var ast = UglifyJS.parse("(" + code + ")();");
assert.strictEqual(ast.TYPE, "Toplevel");
assert.strictEqual(ast.body.length, 1);
assert.strictEqual(ast.body[0].TYPE, "SimpleStatement");
assert.strictEqual(ast.body[0].body.TYPE, "Call");
assert.strictEqual(ast.body[0].body.expression.TYPE, "Function");
assert.throws(function() {
UglifyJS.parse("(async " + code + ")();");
}, function(e) {
return e instanceof UglifyJS.JS_Parse_Error;
}, code);
});
});
it("Should reject `await` expression outside of async functions", function() {
[
"await 42;",
"function f() { await 42; }",
"async function f() { function g() { await 42; } }",
].forEach(function(code) {
assert.throws(function() {
UglifyJS.parse(code);
}, function(e) {
return e instanceof UglifyJS.JS_Parse_Error;
}, code);
});
});
it("Should reject `await` expression directly on computed key of function argument", function() {
[
"function f({ [await 42]: a }) {}",
"async function f({ [await 42]: a }) {}",
].forEach(function(code) {
assert.throws(function() {
UglifyJS.parse(code);
}, function(e) {
return e instanceof UglifyJS.JS_Parse_Error;
}, code);
});
});
it("Should accept `await` expression nested within computed key of function argument", function() {
[
"function f({ [async function() { await 42; }()]: a }) {}",
"async function f({ [async function() { await 42; }()]: a }) {}",
].forEach(function(code) {
var ast = UglifyJS.parse(code);
assert.strictEqual(ast.TYPE, "Toplevel");
assert.strictEqual(ast.body.length, 1);
assert.strictEqual(ast.body[0].argnames.length, 1);
assert.strictEqual(ast.body[0].argnames[0].TYPE, "DestructuredObject");
});
});
});
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