diff --git a/README.md b/README.md
index 0120c9a..3e2c7c7 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,8 @@ node main.js
 
 Result fill write in <lexer.js> file.
 
+You can test it:
+$ node test.js
 
 
 Report for bugs: rolahd@yandex.ru
\ No newline at end of file
diff --git a/lexer.l b/lexer.l
index 2be311b..705608b 100644
--- a/lexer.l
+++ b/lexer.l
@@ -279,43 +279,4 @@ var print_f = function() {
     r_str += next;
 
     return r_str;
-};
-
-console.log("TEST SINGLE");
-(new Lexer("[")).search();
-(new Lexer("]")).search();
-(new Lexer("(")).search();
-(new Lexer(")").search());
-(new Lexer(":")).search();
-(new Lexer(",")).search();
-(new Lexer(".")).search();
-(new Lexer("%")).search();
-(new Lexer(">")).search();
-(new Lexer(">=")).search();
-(new Lexer("<")).search();
-(new Lexer("<=")).search();
-(new Lexer("==")).search();
-(new Lexer("!=")).search();
-(new Lexer("AND")).search();
-(new Lexer("and")).search();
-(new Lexer("OR")).search();
-(new Lexer("or")).search();
-(new Lexer("NOT")).search();
-(new Lexer("not")).search();
-(new Lexer("LIKE")).search();
-(new Lexer("like")).search();
-(new Lexer("NLIKE")).search();
-(new Lexer("nlike")).search();
-(new Lexer("Address")).search();
-(new Lexer("Time")).search();
-(new Lexer("TimeDiff")).search();
-
-var lex_test_all = new Lexer("[  ]  (  )  :  ,  .  %  >  >=  <  <=  ==  !=  AND  and  OR  or  NOT  not  LIKE  like  NLIKE  nlike  Address  Time  TimeDiff 'sdfadfasdf' \"asdfasfd\" ")
-var _lex;
-while(_lex = lex_test_all.next()){
-    console.log("IN while:", _lex.lexeme);
-}
-
-console.log("TEST STRING LITERAL");
-(new Lexer('  "111\\\"11\\\"1" "222222" ')).search();
-(new Lexer("  '111\\\'11\\\'1' '222222' ")).search();
\ No newline at end of file
+};
\ No newline at end of file
diff --git a/main.js b/main.js
index 472b838..375649a 100644
--- a/main.js
+++ b/main.js
@@ -39,5 +39,10 @@ var post_process_lexer = function (_string) {
 
     _string = js_beautify(_string, {indent_size: 4, space_in_empty_paren: true});
 
-    fs.writeFileSync("lexer.js", _string);
+    var output = "lexer.js";
+    if(process.argv[2]){
+        output = process.argv[2];
+    }
+
+    fs.writeFileSync(output, _string);
 };
\ No newline at end of file
diff --git a/test.js b/test.js
new file mode 100644
index 0000000..c1cef56
--- /dev/null
+++ b/test.js
@@ -0,0 +1,62 @@
+/**
+ * Created by Aleksey Chichenkov <a.chichenkov@initi.ru> on 1/25/19.
+ */
+var fs = require("fs");
+var exec = require('child_process').exec;
+
+exec("node main.js lexer_test.js", function(err, stdout, stderr) {
+    err && console.log("ERROR: ", err);
+    err && process.exit(1);
+
+    var file = fs.readFileSync("lexer_test.js", "utf8");
+    file += "\n module.exports = Lexer";
+    fs.writeFileSync("lexer_test.js", file);
+
+    test();
+
+    fs.unlinkSync("lexer_test.js");
+});
+
+var test = function() {
+    var Lexer = require("./lexer_test");
+
+    console.log("TEST SINGLE");
+    (new Lexer("[")).search();
+    (new Lexer("]")).search();
+    (new Lexer("(")).search();
+    (new Lexer(")").search());
+    (new Lexer(":")).search();
+    (new Lexer(",")).search();
+    (new Lexer(".")).search();
+    (new Lexer("%")).search();
+    (new Lexer(">")).search();
+    (new Lexer(">=")).search();
+    (new Lexer("<")).search();
+    (new Lexer("<=")).search();
+    (new Lexer("==")).search();
+    (new Lexer("!=")).search();
+    (new Lexer("AND")).search();
+    (new Lexer("and")).search();
+    (new Lexer("OR")).search();
+    (new Lexer("or")).search();
+    (new Lexer("NOT")).search();
+    (new Lexer("not")).search();
+    (new Lexer("LIKE")).search();
+    (new Lexer("like")).search();
+    (new Lexer("NLIKE")).search();
+    (new Lexer("nlike")).search();
+    (new Lexer("Address")).search();
+    (new Lexer("Time")).search();
+    (new Lexer("TimeDiff")).search();
+
+    var lex_test_all = new Lexer("[  ]  (  )  :  ,  .  %  >  >=  <  <=  ==  !=  AND  and  OR  or  NOT  not  LIKE  like  NLIKE  nlike  Address  Time  TimeDiff 'sdfadfasdf' \"asdfasfd\" ")
+    var _lex;
+
+    console.log("start search");
+    while (_lex = lex_test_all.next());
+
+    console.log("TEST STRING LITERAL");
+    (new Lexer('  "111\\\"11\\\"1" "222222" ')).search();
+    (new Lexer("  '111\\\'11\\\'1' '222222' ")).search();
+
+};
\ No newline at end of file