fengari/test/loadlib.test.js

A Lua VM written in JS ES6 targeting the browser

"use strict";

const lua     = require('../src/lua.js');
const lauxlib = require('../src/lauxlib.js');
const lualib  = require('../src/lualib.js');
const {to_luastring} = require("../src/fengaricore.js");

test('require an existing module', () => {
    let L = lauxlib.luaL_newstate();
    if (!L) throw Error("failed to create lua state");

    let luaCode = `
        return require('os')
    `;
    {
        lualib.luaL_openlibs(L);
        expect(lauxlib.luaL_loadstring(L, to_luastring(luaCode))).toBe(lua.LUA_OK);
        lua.lua_call(L, 0, -1);
    }

    expect(lua.lua_istable(L, -1)).toBe(true);
});


test('require a file', () => {
    let L = lauxlib.luaL_newstate();
    if (!L) throw Error("failed to create lua state");

    let luaCode = `
        return require('test.module-hello')()
    `;
    {
        lualib.luaL_openlibs(L);
        expect(lauxlib.luaL_loadstring(L, to_luastring(luaCode))).toBe(lua.LUA_OK);
        lua.lua_call(L, 0, -1);
    }

    expect(lua.lua_tojsstring(L, -1)).toBe("hello from module");
});


test('package.loadlib', () => {
    let L = lauxlib.luaL_newstate();
    if (!L) throw Error("failed to create lua state");

    let luaCode = `
        return package.loadlib('./test/lib-hello.js.mod', 'hello')()
    `;
    {
        lualib.luaL_openlibs(L);
        expect(lauxlib.luaL_loadstring(L, to_luastring(luaCode))).toBe(lua.LUA_OK);
        lua.lua_call(L, 0, -1);
    }

    expect(lua.lua_tojsstring(L, -1)).toBe("hello from js lib");
});


test('package.searchpath', () => {
    let L = lauxlib.luaL_newstate();
    if (!L) throw Error("failed to create lua state");

    let luaCode = `
        return package.searchpath('module-hello', './?.lua;./test/?.lua')
    `;
    {
        lualib.luaL_openlibs(L);
        expect(lauxlib.luaL_loadstring(L, to_luastring(luaCode))).toBe(lua.LUA_OK);
        lua.lua_call(L, 0, -1);
    }

    expect(lua.lua_tojsstring(L, -1)).toBe("./test/module-hello.lua");
});