core-chain/jsre/jsre_test.go

// Copyright 2015 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.

package jsre

import (
	"io/ioutil"
	"os"
	"testing"
	"time"

	"github.com/robertkrimen/otto"
)

type testNativeObjectBinding struct{}

type msg struct {
	Msg string
}

func (no *testNativeObjectBinding) TestMethod(call otto.FunctionCall) otto.Value {
	m, err := call.Argument(0).ToString()
	if err != nil {
		return otto.UndefinedValue()
	}
	v, _ := call.Otto.ToValue(&msg{m})
	return v
}

func TestExec(t *testing.T) {
	jsre := New("/tmp")

	ioutil.WriteFile("/tmp/test.js", []byte(`msg = "testMsg"`), os.ModePerm)
	err := jsre.Exec("test.js")
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	val, err := jsre.Run("msg")
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	if !val.IsString() {
		t.Errorf("expected string value, got %v", val)
	}
	exp := "testMsg"
	got, _ := val.ToString()
	if exp != got {
		t.Errorf("expected '%v', got '%v'", exp, got)
	}
	jsre.Stop(false)
}

func TestNatto(t *testing.T) {
	jsre := New("/tmp")

	ioutil.WriteFile("/tmp/test.js", []byte(`setTimeout(function(){msg = "testMsg"}, 1);`), os.ModePerm)
	err := jsre.Exec("test.js")
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	time.Sleep(time.Millisecond * 10)
	val, err := jsre.Run("msg")
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	if !val.IsString() {
		t.Errorf("expected string value, got %v", val)
	}
	exp := "testMsg"
	got, _ := val.ToString()
	if exp != got {
		t.Errorf("expected '%v', got '%v'", exp, got)
	}
	jsre.Stop(false)
}

func TestBind(t *testing.T) {
	jsre := New("/tmp")

	jsre.Bind("no", &testNativeObjectBinding{})

	val, err := jsre.Run(`no.TestMethod("testMsg")`)
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	pp, err := jsre.PrettyPrint(val)
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	t.Logf("no: %v", pp)
	jsre.Stop(false)
}

func TestLoadScript(t *testing.T) {
	jsre := New("/tmp")

	ioutil.WriteFile("/tmp/test.js", []byte(`msg = "testMsg"`), os.ModePerm)
	_, err := jsre.Run(`loadScript("test.js")`)
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	val, err := jsre.Run("msg")
	if err != nil {
		t.Errorf("expected no error, got %v", err)
	}
	if !val.IsString() {
		t.Errorf("expected string value, got %v", val)
	}
	exp := "testMsg"
	got, _ := val.ToString()
	if exp != got {
		t.Errorf("expected '%v', got '%v'", exp, got)
	}
	jsre.Stop(false)
}