import Builder from '../Builder.js'

import * as assert from '../assert.js'

const b = new Builder();

b.Type().End()

.Function().End()

.Export()

.Function("loop")

.End()

.Code()

.Function("loop", { params: ["i32"], ret: "i32" }, ["i32"])

.I32Const(0)

.SetLocal(1)

.Loop("void")

.Block("void", b =>

b.GetLocal(0)

.I32Const(0)

.I32Eq()

.BrIf(0)

.GetLocal(0)

.GetLocal(1)

.I32Add()

.SetLocal(1)

.GetLocal(0)

.I32Const(1)

.I32Sub()

.SetLocal(0)

.Br(1)

)

.End()

.GetLocal(1)

.Return()

.End()

.End()

const bin = b.WebAssembly().get();

const module = new WebAssembly.Module(bin);

const instance = new WebAssembly.Instance(module);

assert.eq(0, instance.exports.loop(0));

assert.eq(1, instance.exports.loop(1));

assert.eq(3, instance.exports.loop(2));

assert.eq(5050, instance.exports.loop(100));