Added printer test

README.md

@@ -9,7 +9,7 @@ It can be used in [Flutter](https://flutter.dev/) or pure [Dart](https://dart.de
 To scan for printers in your network, consider using [ping_discover_network](https://pub.dev/packages/ping_discover_network) package. Note that most of the ESC/POS printers by default listen on port 9100.
 
 ## Tested Printers
-Here are some [printers tested with this library](printers.md). Please add your models you have tested to maintain and improve this library and help others to choose the right printer.
+Here are some [printers tested with this library](printers.md). Please add the models you have tested to maintain and improve this library and help others to choose the right printer.
 
 
 

example/discover_printers/lib/main.dart

+import 'dart:io';
 import 'dart:typed_data';
 import 'package:flutter/material.dart' hide Image;
 import 'package:esc_pos_printer/esc_pos_printer.dart';
@@ -88,8 +89,8 @@ class _MyHomePageState extends State<MyHomePage> {
       });
   }
 
-  Future<Ticket> testTicket() async {
-    final Ticket ticket = Ticket(PaperSize.mm80);
+  Future<Ticket> demoTicket(PaperSize paper) async {
+    final Ticket ticket = Ticket(paper);
 
     ticket.text(
         'Regular: aA bB cC dD eE fF gG hH iI jJ kK lL mM nN oO pP qQ rR sS tT uU vV wW xX yY zZ');
@@ -157,12 +158,156 @@ class _MyHomePageState extends State<MyHomePage> {
     return ticket;
   }
 
+  Ticket testPrinter1(PaperSize paper) {
+    final Ticket ticket = Ticket(paper);
+
+    ticket.text('Test 1. Text Styles, Code Tables & Positions',
+        styles: PosStyles(align: PosAlign.center), linesAfter: 2);
+
+    ticket.text('Regular: Hello world!');
+    ticket.text('westEur: àÀ èÈ éÉ ûÛ üÜ çÇ ôÔ blåbærgrød',
+        styles: PosStyles(codeTable: PosCodeTable.westEur));
+    ticket.text('Bold text', styles: PosStyles(bold: true));
+    ticket.text('Reverse text', styles: PosStyles(reverse: true));
+    ticket.text('Underlined text',
+        styles: PosStyles(underline: true), linesAfter: 1);
+    ticket.text('Align left', styles: PosStyles(align: PosAlign.left));
+    ticket.text('Align center', styles: PosStyles(align: PosAlign.center));
+    ticket.text('Align right',
+        styles: PosStyles(align: PosAlign.right), linesAfter: 1);
+
+    ticket.row([
+      PosColumn(
+        text: 'col3',
+        width: 3,
+        styles: PosStyles(align: PosAlign.center, underline: true),
+      ),
+      PosColumn(
+        text: 'col6',
+        width: 6,
+        styles: PosStyles(align: PosAlign.center, underline: true),
+      ),
+      PosColumn(
+        text: 'col3',
+        width: 3,
+        styles: PosStyles(align: PosAlign.center, underline: true),
+      ),
+    ]);
+
+    ticket.text('Text size 200%',
+        styles: PosStyles(
+          height: PosTextSize.size2,
+          width: PosTextSize.size2,
+          align: PosAlign.center,
+        ));
+
+    ticket.feed(3);
+    ticket.cut();
+    return ticket;
+  }
+
+  Future<Ticket> testPrinter2_1(PaperSize paper) async {
+    final Ticket ticket = Ticket(paper);
+
+    ticket.text('Test 2. Images',
+        styles: PosStyles(align: PosAlign.center), linesAfter: 2);
+
+    // Print image
+    final ByteData data = await rootBundle.load('assets/logo.png');
+    final Uint8List bytes = data.buffer.asUint8List();
+    final Image image = decodeImage(bytes);
+
+    ticket.text('Command: ESC *');
+    ticket.image(image);
+
+    ticket.feed(2);
+    return ticket;
+  }
+
+  Future<Ticket> testPrinter2_2(PaperSize paper) async {
+    final Ticket ticket = Ticket(paper);
+
+    // Print image
+    final ByteData data = await rootBundle.load('assets/logo.png');
+    final Uint8List bytes = data.buffer.asUint8List();
+    final Image image = decodeImage(bytes);
+
+    ticket.text('Command: GS v 0');
+    ticket.imageRaster(image, imageFn: PosImageFn.bitImageRaster);
+
+    ticket.feed(2);
+    return ticket;
+  }
+
+  Future<Ticket> testPrinter2_3(PaperSize paper) async {
+    final Ticket ticket = Ticket(paper);
+
+    // Print image
+    final ByteData data = await rootBundle.load('assets/logo.png');
+    final Uint8List bytes = data.buffer.asUint8List();
+    final Image image = decodeImage(bytes);
+
+    ticket.text('Command: GS ( L');
+    ticket.imageRaster(image, imageFn: PosImageFn.graphics);
+
+    ticket.feed(3);
+    ticket.cut();
+    return ticket;
+  }
+
+  Ticket testPrinter3(PaperSize paper) {
+    final Ticket ticket = Ticket(paper);
+
+    ticket.text('Test 3. Barcode UPC-A',
+        styles: PosStyles(align: PosAlign.center), linesAfter: 2);
+
+    // Print barcode
+    final List<int> barData = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 4];
+    ticket.barcode(Barcode.upcA(barData));
+
+    ticket.feed(3);
+    ticket.cut();
+
+    return ticket;
+  }
+
   void testPrint(String printerIp, BuildContext ctx) async {
     final PrinterNetworkManager printerManager = PrinterNetworkManager();
     printerManager.selectPrinter(printerIp, port: 9100);
 
+    // TODO Don't forget to choose printer's paper
+    const PaperSize paper = PaperSize.mm80;
+
+    // Demo ticket
     final PosPrintResult res =
-        await printerManager.printTicket(await testTicket());
+        await printerManager.printTicket(await demoTicket(paper));
+
+    // TODO Comment the above printTicket line and uncomment those to run a more complete test.
+    // Don't forget to add your results here (WIFI/Network): https://github.com/andrey-ushakov/esc_pos_printer/blob/master/printers.md
+    // or here (Bluetooth): https://github.com/andrey-ushakov/esc_pos_bluetooth/blob/master/printers.md
+    // NOTE: If your printer can't handle all tests together, you can run them individually
+
+    // TEST PRINTER - START
+    // Test1 - Texts
+    // await printerManager.printTicket(testPrinter1(paper));
+    // sleep(Duration(seconds: 3));
+
+    // Test2 - Images (3 commands)
+    // await printerManager.printTicket(await testPrinter2_1(paper));
+    // sleep(Duration(seconds: 3));
+
+    // await printerManager.printTicket(await testPrinter2_2(paper));
+    // sleep(Duration(seconds: 3));
+
+    // await printerManager.printTicket(await testPrinter2_3(paper));
+    // sleep(Duration(seconds: 3));
+
+    // Test3 - Barcode
+    // final PosPrintResult res =
+    //     await printerManager.printTicket(testPrinter3(paper));
+    // sleep(Duration(seconds: 3));
+    // TEST PRINTER - END
+
     final snackBar =
         SnackBar(content: Text(res.msg, textAlign: TextAlign.center));
     Scaffold.of(ctx).showSnackBar(snackBar);