github.com/anthdm/go-ethereum@v1.8.4-0.20180412101906-60516c83b011/internal/jsre/jsre_test.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package jsre
    18  
    19  import (
    20  	"io/ioutil"
    21  	"os"
    22  	"path"
    23  	"testing"
    24  	"time"
    25  
    26  	"github.com/robertkrimen/otto"
    27  )
    28  
    29  type testNativeObjectBinding struct{}
    30  
    31  type msg struct {
    32  	Msg string
    33  }
    34  
    35  func (no *testNativeObjectBinding) TestMethod(call otto.FunctionCall) otto.Value {
    36  	m, err := call.Argument(0).ToString()
    37  	if err != nil {
    38  		return otto.UndefinedValue()
    39  	}
    40  	v, _ := call.Otto.ToValue(&msg{m})
    41  	return v
    42  }
    43  
    44  func newWithTestJS(t *testing.T, testjs string) (*JSRE, string) {
    45  	dir, err := ioutil.TempDir("", "jsre-test")
    46  	if err != nil {
    47  		t.Fatal("cannot create temporary directory:", err)
    48  	}
    49  	if testjs != "" {
    50  		if err := ioutil.WriteFile(path.Join(dir, "test.js"), []byte(testjs), os.ModePerm); err != nil {
    51  			t.Fatal("cannot create test.js:", err)
    52  		}
    53  	}
    54  	return New(dir, os.Stdout), dir
    55  }
    56  
    57  func TestExec(t *testing.T) {
    58  	jsre, dir := newWithTestJS(t, `msg = "testMsg"`)
    59  	defer os.RemoveAll(dir)
    60  
    61  	err := jsre.Exec("test.js")
    62  	if err != nil {
    63  		t.Errorf("expected no error, got %v", err)
    64  	}
    65  	val, err := jsre.Run("msg")
    66  	if err != nil {
    67  		t.Errorf("expected no error, got %v", err)
    68  	}
    69  	if !val.IsString() {
    70  		t.Errorf("expected string value, got %v", val)
    71  	}
    72  	exp := "testMsg"
    73  	got, _ := val.ToString()
    74  	if exp != got {
    75  		t.Errorf("expected '%v', got '%v'", exp, got)
    76  	}
    77  	jsre.Stop(false)
    78  }
    79  
    80  func TestNatto(t *testing.T) {
    81  	jsre, dir := newWithTestJS(t, `setTimeout(function(){msg = "testMsg"}, 1);`)
    82  	defer os.RemoveAll(dir)
    83  
    84  	err := jsre.Exec("test.js")
    85  	if err != nil {
    86  		t.Errorf("expected no error, got %v", err)
    87  	}
    88  	time.Sleep(100 * time.Millisecond)
    89  	val, err := jsre.Run("msg")
    90  	if err != nil {
    91  		t.Errorf("expected no error, got %v", err)
    92  	}
    93  	if !val.IsString() {
    94  		t.Errorf("expected string value, got %v", val)
    95  	}
    96  	exp := "testMsg"
    97  	got, _ := val.ToString()
    98  	if exp != got {
    99  		t.Errorf("expected '%v', got '%v'", exp, got)
   100  	}
   101  	jsre.Stop(false)
   102  }
   103  
   104  func TestBind(t *testing.T) {
   105  	jsre := New("", os.Stdout)
   106  	defer jsre.Stop(false)
   107  
   108  	jsre.Bind("no", &testNativeObjectBinding{})
   109  
   110  	_, err := jsre.Run(`no.TestMethod("testMsg")`)
   111  	if err != nil {
   112  		t.Errorf("expected no error, got %v", err)
   113  	}
   114  }
   115  
   116  func TestLoadScript(t *testing.T) {
   117  	jsre, dir := newWithTestJS(t, `msg = "testMsg"`)
   118  	defer os.RemoveAll(dir)
   119  
   120  	_, err := jsre.Run(`loadScript("test.js")`)
   121  	if err != nil {
   122  		t.Errorf("expected no error, got %v", err)
   123  	}
   124  	val, err := jsre.Run("msg")
   125  	if err != nil {
   126  		t.Errorf("expected no error, got %v", err)
   127  	}
   128  	if !val.IsString() {
   129  		t.Errorf("expected string value, got %v", val)
   130  	}
   131  	exp := "testMsg"
   132  	got, _ := val.ToString()
   133  	if exp != got {
   134  		t.Errorf("expected '%v', got '%v'", exp, got)
   135  	}
   136  	jsre.Stop(false)
   137  }