path: root/jsre/jsre_test.go

package jsre

import (
    "github.com/obscuren/otto"
    "os"
    "path"
    "testing"

    "github.com/ethereum/go-ethereum/ethutil"
)

var defaultAssetPath = path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist", "assets", "ext")

type testNativeObjectBinding struct {
    toVal func(interface{}) otto.Value
}

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()
    }
    return no.toVal(&msg{m})
}

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

    ethutil.WriteFile("/tmp/test.js", []byte(`msg = "testMsg"`))
    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)
    }

    // this errors
    err = jsre.Exec(path.Join(defaultAssetPath, "bignumber.min.js"))
    if err != nil {
        t.Errorf("expected no error, got %v", err)
    }
    _, err = jsre.Run("x = new BigNumber(123.4567);")
    if err != nil {
        t.Errorf("expected no error, got %v", err)
    }
}

func TestBind(t *testing.T) {
    jsre := New(defaultAssetPath)

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

    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)
}

func TestRequire(t *testing.T) {
    jsre := New(defaultAssetPath)

    _, err := jsre.Run("x = new BigNumber(123.4567);")
    if err == nil {
        t.Errorf("expected error, got nothing")
    }
    _, err = jsre.Run(`loadScript("bignumber.min.js"); x = new BigNumber(123.4567)`)
    if err != nil {
        t.Errorf("expected no error, got %v", err)
    }

}