diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/ltm.js | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tests/ltm.js b/tests/ltm.js index 8a20f67..00ea0e6 100644 --- a/tests/ltm.js +++ b/tests/ltm.js @@ -1137,4 +1137,63 @@ test('__unm, __bnot', function (t) { "hello", "Program output is correct" ); +}); + + +test('__len', function (t) { + let luaCode = ` + local mt = { + __len = function (a) + return "hello" + end + } + + local t = {} + + -- setmetatable(t, mt) + + return #t + `, L; + + t.plan(4); + + t.comment("Running following code: \n" + luaCode); + + // main <hello.lua:0,0> (7 instructions at 0x7f91f0600ac0) + // 0+ params, 3 slots, 1 upvalue, 2 locals, 1 constant, 1 function + // 1 [1] NEWTABLE 0 0 1 + // 2 [4] CLOSURE 1 0 ; 0x7f91f0600d10 + // 3 [4] SETTABLE 0 -1 1 ; "__len" - + // 4 [7] NEWTABLE 1 0 0 + // 5 [11] LEN 2 1 <=== We stop here + // 6 [11] RETURN 2 2 + // 7 [11] RETURN 0 1 + // + // ... + + t.doesNotThrow(function () { + L = getState(luaCode); + }, "Bytecode parsed without errors"); + + L.stack[0].p.code[4].breakpoint = true; + + t.doesNotThrow(function () { + ldo.luaD_call(L, 0, -1); + }, "First part of the program executed without errors"); + + L.ci.pcOff--; + L.stack[0].p.code[4].breakpoint = false; + + t.comment("We manually set t's metatable to mt"); + L.stack[2].metatable = L.stack[1]; + + t.doesNotThrow(function () { + VM.luaV_execute(L); + }, "Second part of the program executed without errors"); + + t.strictEqual( + L.stack[L.top - 1].value, + "hello", + "Program output is correct" + ); });
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