swc/node-swc/__tests__/transform/preset-env_test.mjs

import swc from "../../..";

it("should respect custom transform option", async () => {
    const { code } = await swc.transform(
        `
        const spread = 1;
        const { foo, ...rest } = { ...spread }
        
        async function bar() {
            await 1;
        }
        function* baz() {
            yield 1;
            yield 2;
        }
        `,
        {
            env: {
                targets: {
                    chrome: "79",
                },
                include: [
                    "transform-async-to-generator",
                    "transform-regenerator",
                ],
            },
        }
    );
    expect(code).toMatchInlineSnapshot(`
        "function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
            try {
                var info = gen[key](arg);
                var value = info.value;
            } catch (error) {
                reject(error);
                return;
            }
            if (info.done) {
                resolve(value);
            } else {
                Promise.resolve(value).then(_next, _throw);
            }
        }
        function _async_to_generator(fn) {
            return function() {
                var self = this, args = arguments;
                return new Promise(function(resolve, reject) {
                    var gen = fn.apply(self, args);
                    function _next(value) {
                        asyncGeneratorStep(gen, resolve, reject, _next, _throw, \\"next\\", value);
                    }
                    function _throw(err) {
                        asyncGeneratorStep(gen, resolve, reject, _next, _throw, \\"throw\\", err);
                    }
                    _next(undefined);
                });
            };
        }
        function _ts_generator(thisArg, body) {
            var f, y, t, g, _ = {
                label: 0,
                sent: function() {
                    if (t[0] & 1) throw t[1];
                    return t[1];
                },
                trys: [],
                ops: []
            };
            return g = {
                next: verb(0),
                \\"throw\\": verb(1),
                \\"return\\": verb(2)
            }, typeof Symbol === \\"function\\" && (g[Symbol.iterator] = function() {
                return this;
            }), g;
            function verb(n) {
                return function(v) {
                    return step([
                        n,
                        v
                    ]);
                };
            }
            function step(op) {
                if (f) throw new TypeError(\\"Generator is already executing.\\");
                while(_)try {
                    if (f = 1, y && (t = op[0] & 2 ? y[\\"return\\"] : op[0] ? y[\\"throw\\"] || ((t = y[\\"return\\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
                    if (y = 0, t) op = [
                        op[0] & 2,
                        t.value
                    ];
                    switch(op[0]){
                        case 0:
                        case 1:
                            t = op;
                            break;
                        case 4:
                            _.label++;
                            return {
                                value: op[1],
                                done: false
                            };
                        case 5:
                            _.label++;
                            y = op[1];
                            op = [
                                0
                            ];
                            continue;
                        case 7:
                            op = _.ops.pop();
                            _.trys.pop();
                            continue;
                        default:
                            if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {
                                _ = 0;
                                continue;
                            }
                            if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {
                                _.label = op[1];
                                break;
                            }
                            if (op[0] === 6 && _.label < t[1]) {
                                _.label = t[1];
                                t = op;
                                break;
                            }
                            if (t && _.label < t[2]) {
                                _.label = t[2];
                                _.ops.push(op);
                                break;
                            }
                            if (t[2]) _.ops.pop();
                            _.trys.pop();
                            continue;
                    }
                    op = body.call(thisArg, _);
                } catch (e) {
                    op = [
                        6,
                        e
                    ];
                    y = 0;
                } finally{
                    f = t = 0;
                }
                if (op[0] & 5) throw op[1];
                return {
                    value: op[0] ? op[1] : void 0,
                    done: true
                };
            }
        }
        const spread = 1;
        const { foo , ...rest } = {
            ...spread
        };
        function bar() {
            return _bar.apply(this, arguments);
        }
        function _bar() {
            _bar = _async_to_generator(function() {
                return _ts_generator(this, function(_state) {
                    switch(_state.label){
                        case 0:
                            return [
                                4,
                                1
                            ];
                        case 1:
                            _state.sent();
                            return [
                                2
                            ];
                    }
                });
            });
            return _bar.apply(this, arguments);
        }
        function baz() {
            return _ts_generator(this, function(_state) {
                switch(_state.label){
                    case 0:
                        return [
                            4,
                            1
                        ];
                    case 1:
                        _state.sent();
                        return [
                            4,
                            2
                        ];
                    case 2:
                        _state.sent();
                        return [
                            2
                        ];
                }
            });
        }
        "
    `);
});