summaryrefslogtreecommitdiff
path: root/tests/lvm.js
blob: d2c716a6e144f3100fab6c564b6d4492077794a3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
"use strict";

const test           = require('tape');
const fs             = require('fs');
const child_process  = require('child_process');
const beautify       = require('js-beautify').js_beautify;
const tmp            = require('tmp');
const DataView       = require('buffer-dataview');

const BytecodeParser = require("../src/lundump.js");
const lua_State      = require("../src/lstate.js").lua_State;
const LuaVM          = require("../src/lvm.js").LuaVM;

const toByteCode = function (luaCode) {
    var luaFile = tmp.fileSync(),
        bclist;

    fs.writeSync(luaFile.fd, luaCode);

    child_process.execSync(`luac-5.3 -o ${luaFile.name}.bc ${luaFile.name}`);
    child_process.execSync(`luac-5.3 -l ${luaFile.name} > ${luaFile.name}.bc.txt`);

    bclist = fs.readFileSync(`${luaFile.name}.bc.txt`, 'utf8');

    console.log(bclist);

    return {
        dataView: new DataView(fs.readFileSync(`${luaFile.name}.bc`)),
        bclist: bclist
    };
};

const getVM = function (luaCode) {
    var bc = toByteCode(luaCode),
        dv = bc.dataView,
        bcl = bc.bclist;

    let p = new BytecodeParser(dv);
    let cl = p.luaU_undump();

    let L = new lua_State(cl);

    return new LuaVM(L);
};

test('LOADK, RETURN', function (t) {
    let luaCode = `
        local a = "hello world"
        return a
    `, vm;
    
    t.plan(2);

    t.comment("Running following code: \n" + luaCode);

    t.doesNotThrow(function () {
        vm = getVM(luaCode);
        vm.execute();
    }, "Program executed without errors");

    t.strictEqual(
        vm.L.stack[0].value,
        "hello world",
        "Program output is correct"
    );
});


test('MOV', function (t) {
    let luaCode = `
        local a = "hello world"
        local b = a
        return b
    `, vm;
    
    t.plan(2);

    t.comment("Running following code: \n" + luaCode);

    t.doesNotThrow(function () {
        vm = getVM(luaCode);
        vm.execute();
    }, "Program executed without errors");

    t.strictEqual(
        vm.L.stack[0].value,
        "hello world",
        "Program output is correct"
    );
});

test('Binary op', function (t) {
    let luaCode = `
        local a = 5
        local b = 10
        return a + b, a - b, a * b, a / b, a % b, a^b, a // b, a & b, a | b, a ~ b, a << b, a >> b
    `, vm;
    
    t.plan(2);

    t.comment("Running following code: \n" + luaCode);

    t.doesNotThrow(function () {
        vm = getVM(luaCode);
        vm.execute();
    }, "Program executed without errors");

    t.deepEqual(
        vm.L.stack.slice(0, 12).map(function (e) { return e.value; }),
        [15, -5, 50, 0.5, 5, 9765625.0, 0, 0, 15, 15, 5120, 0],
        "Program output is correct"
    );
});


test('Unary op', function (t) {
    let luaCode = `
        local a = 5
        local b = false
        return -a, not b, ~a
    `, vm;
    
    t.plan(2);

    t.comment("Running following code: \n" + luaCode);

    t.doesNotThrow(function () {
        vm = getVM(luaCode);
        vm.execute();
    }, "Program executed without errors");

    t.deepEqual(
        vm.L.stack.slice(0, 3).map(function (e) { return e.value; }),
        [-5, true, -6],
        "Program output is correct"
    );
});