make serialport module as optional dependency #221 and fix test case

 #

.gitignore

@@ -1,7 +1,7 @@
-.DS_*
-node_modules
-*.sublime*
-psd
-thumb
+
+
 *.log
+yarn.lock
 package-lock.json
+
+node_modules/

adapter/serial.js

@@ -1,7 +1,6 @@
 'use strict';
 const util          = require('util');
 const EventEmitter  = require('events');
-const SerialPort    = require('serialport');
 
 /**
  * SerialPort device
@@ -14,6 +13,7 @@ function Serial(port, options){
     baudRate: 9600,
     autoOpen: false
   };
+  const SerialPort = require('serialport');
   this.device = new SerialPort(port, options);
   this.device.on('close', function() {
     self.emit('disconnect', self.device);

package.json

@@ -4,7 +4,8 @@
   "description": "ESC/POS Printer driver for nodejs",
   "main": "index.js",
   "scripts": {
-    "test": "mocha"
+    "test": "mocha",
+    "start": "node server.js"
   },
   "repository": {
     "type": "git",
@@ -14,11 +15,7 @@
     "escpos",
     "printer"
   ],
-  "author": {
-    "name": "Lsong",
-    "email": "[email protected]",
-    "url": "https://lsong.org"
-  },
+  "author": "Lsong <[email protected]> (https://lsong.org)",
   "contributors": [
     "Jose Vera <[email protected]>",
     "Sébastien Vidal <[email protected]>",
@@ -33,20 +30,25 @@
   },
   "homepage": "https://github.com/song940/node-escpos#readme",
   "dependencies": {
+    "qr-image": "*",
+    "get-pixels": "*",
     "iconv-lite": "*",
     "mutable-buffer": "^2.0.3"
   },
   "optionalDependencies": {
-    "get-pixels": "*",
-    "serialport": "*",
-    "qr-image": "*",
     "usb": "*",
+    "serialport": "*",
     "node-bluetooth": "*"
   },
   "devDependencies": {
     "mocha": "*"
   },
   "engines": {
     "node": ">=8.x"
+  },
+  "directories": {
+    "doc": "docs",
+    "example": "examples",
+    "test": "test"
   }
 }

test/test.js

@@ -8,63 +8,15 @@ describe('ESC/POS printing test', function() {
       assert.equal(data.length, 3);
       done();
     });
-    device.write(new Buffer(3));
+    device.write(Buffer.alloc(3));
   })
 
   it('printer#print', function(done){
     var device = new escpos.Console(function(data){
-      assert.deepEqual(data, new Buffer('hello world'));
+      assert.deepEqual(data, Buffer.from('hello world'));
       done();
     });
     var printer = new escpos.Printer(device);
     printer.print('hello world').flush();
   })
-
-  it('printer#print2', function(done){
-
- const networkDevice = new escpos.Network('192.168.1.87', 9100);
-
-
- const options = { encoding: "windows1254" /* default */ }
- // encoding is optional
-
- const printer = new escpos.Printer(networkDevice, options);
-
-
-
- networkDevice.open(function(){
-  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols,)
-    { text:"Left", align:"LEFT", width:0.33 },
-    { text:"Large Message for New Line  ", align:"LEFT", width:0.33  },
-    { text:"Right", align:"RIGHT", width:0.33 }
-  ]);
-  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols)
-    { text:"Left", align:"LEFT", width:0.13 },
-    { text:"Left", align:"LEFT", width:0.10 },
-    { text:"Center", align:"CENTER", width:0.33 },
-    { text:"Right", align:"RIGHT", width:0.33 }
-  ]);
-  printer.drawLine();
-  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols)
-    { text:"Left", align:"LEFT", width:0.33 },
-    { text:"Center", align:"CENTER", width:0.33},
-    { text:"Right", align:"RIGHT", width:0.33 }
-  ]);
-  printer.tableCustom([                                       // Prints table with custom settings (text, align, width, cols)
-    { text:"Left", align:"LEFT", width:0.33 },
-    { text:"Center", align:"CENTER", width:0.33 },
-    { text:"Right", align:"RIGHT", width:0.33 }
-  ]);
-  printer.newLine();
-  printer.newLine();
-  printer.newLine();
-  printer.newLine();
-   printer.cut();
-   printer.close();
-   printer.beep();
-
-   done();
- });
-  })
-
-});
+});