swc/node-swc/__tests__/minify_test.mjs

import swc from '../..';

it("should compress", async () => {
    const { code } = await swc.minify(`
    import foo from '@src/app';
    console.log(foo)
    `);

    expect(code).toMatchInlineSnapshot(`"import foo from'@src/app';console.log(foo)"`);
})

it("should accept object", async () => {
    const { code } = await swc.minify(`
    import foo from '@src/app';
    console.log(foo)
    `, {});

    expect(code).toMatchInlineSnapshot(`"import foo from'@src/app';console.log(foo)"`);
})

it("should accpept { mangle = true }", async () => {
    const { code } = await swc.minify(`
    import foo from '@src/app';
    console.log(foo)
    `, {
        compress: false,
        mangle: true,
    });

    expect(code).toMatchInlineSnapshot(`"import a from'@src/app';console.log(a)"`);
})

it("should accpept { mangle = object }", async () => {
    const { code } = await swc.minify(`
    import foo from '@src/app';
    console.log(foo)
    `, {
        compress: false,
        mangle: {
            topLevel: true
        },
    });

    expect(code).toMatchInlineSnapshot(`"import a from'@src/app';console.log(a)"`);
})

it("should mangle locals", async () => {
    const { code } = await swc.minify(`
    (function(){
        const longName = Math.random() + '_' + Math.random();
        console.log(longName);
        console.log(longName);
        console.log(longName);
        console.log(longName);
        console.log(longName);
        console.log(longName);
    })()
    `, {
        compress: false,
        mangle: {
            topLevel: true
        },
    });

    expect(code).toMatchInlineSnapshot(`"(function(){const a=Math.random()+'_'+Math.random();console.log(a);console.log(a);console.log(a);console.log(a);console.log(a);console.log(a)})()"`);
})

describe('soruce map', () => {
    it("should have `names`", async () => {
        const { map } = await swc.minify(`
        (function(){
            const longName = Math.random() + '_' + Math.random();
            console.log(longName);
            console.log(longName);
        })()
        `, {
            sourceMap: true,
            compress: false,
            mangle: {
                topLevel: true
            },
        });

        expect(JSON.parse(map)).toHaveProperty("names");
        expect(JSON.parse(map).names).not.toEqual([])
    });

    it("should not have `sourcesContent` if file name is speicified`", async () => {
        const { map } = await swc.minify({
            'foo.js': `(function(){
                            const longName = Math.random() + '_' + Math.random();
                            console.log(longName);
                        })()`
        }, {
            sourceMap: true,
            compress: false,
            mangle: {
                topLevel: true
            },
        });

        const j = JSON.parse(map);
        expect(j.sourcesContent).toBeUndefined()
    });

    it("should have `sources` if file name is speicified", async () => {
        const { map } = await swc.minify({
            'foo.js': `(function(){
                const longName = Math.random() + '_' + Math.random();
                console.log(longName);
            })()`
        }, {
            sourceMap: true,
            compress: false,
            mangle: {
                topLevel: true
            },
        });

        const j = JSON.parse(map);
        expect(j).toHaveProperty("sources");
        expect(j.sources).not.toEqual([]);
    });
})


describe('transform apis', () => {
    it("handle jsc.minify", async () => {
        const { code } = await swc.transform(`
        (function(){
            const longName = Math.random() + '_' + Math.random();
            console.log(longName);
            console.log(longName);
            console.log(longName);
            console.log(longName);
            console.log(longName);
            console.log(longName);
        })()
        `, {
            jsc: {
                minify: {
                    compress: false,
                    mangle: {
                        topLevel: true
                    },
                }
            },
            minify: true,
        });

        expect(code).toMatchInlineSnapshot(`"(function(){var a=Math.random()+'_'+Math.random();console.log(a);console.log(a);console.log(a);console.log(a);console.log(a);console.log(a)})()"`);
    })

})