Add Text Widget tests

@@ -103,7 +103,7 @@ class RichText extends Widget {
       this.maxLines})
       : assert(text != null);
 
-  static const bool debug = false;
+  static bool debug = false;
 
   final TextSpan text;
 

@@ -30,6 +30,7 @@ import 'widget_clip_test.dart' as widget_clip;
 import 'widget_container_test.dart' as widget_container;
 import 'widget_table_test.dart' as widget_table;
 import 'widget_test.dart' as widget;
+import 'widget_text_test.dart' as widget_text;
 
 void main() {
   annotations.main();
@@ -44,6 +45,7 @@ void main() {
   widget_clip.main();
   widget_container.main();
   widget_table.main();
+  widget_text.main();
   widget.main();
   example.main();
 }

+/*
+ * Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import 'dart:io';
+import 'dart:math' as math;
+import 'dart:typed_data';
+
+import 'package:test/test.dart';
+import 'package:pdf/pdf.dart';
+import 'package:pdf/widgets.dart';
+
+Document pdf;
+Font ttf;
+Font ttfBold;
+
+void main() {
+  setUpAll(() {
+    Document.debug = true;
+    RichText.debug = true;
+    final Uint8List fontData = File('open-sans.ttf').readAsBytesSync();
+    ttf = Font.ttf(fontData.buffer.asByteData());
+    final Uint8List fontDataBold = File('open-sans-bold.ttf').readAsBytesSync();
+    ttfBold = Font.ttf(fontDataBold.buffer.asByteData());
+    pdf = Document();
+  });
+
+  test('Text Widgets Quotes', () {
+    pdf.addPage(Page(
+        build: (Context context) => Text('Text containing \' or " works!')));
+  });
+
+  test('Text Widgets Unicode Quotes', () {
+    pdf.addPage(Page(
+        build: (Context context) => Text('Text containing ’ and ” works!',
+            style: TextStyle(font: ttf))));
+  });
+
+  test('Text Widgets softWrap', () {
+    pdf.addPage(MultiPage(
+        build: (Context context) => <Widget>[
+              Text(
+                'Text with\nsoft wrap\nenabled',
+                softWrap: true,
+              ),
+              Text(
+                'Text with\nsoft wrap\ndisabled',
+                softWrap: false,
+              ),
+            ]));
+  });
+
+  test('Text Widgets Alignement', () {
+    final String para = LoremText().paragraph(40);
+
+    final List<Widget> widgets = <Widget>[];
+    for (TextAlign align in TextAlign.values) {
+      widgets.add(
+        Text(
+          '$align:\n' + para,
+          textAlign: align,
+          softWrap: true,
+        ),
+      );
+    }
+
+    pdf.addPage(MultiPage(build: (Context context) => widgets));
+  });
+
+  test('Text Widgets lineSpacing', () {
+    final String para = LoremText().paragraph(40);
+
+    final List<Widget> widgets = <Widget>[];
+    for (double spacing = 0.0; spacing < 10.0; spacing += 2.0) {
+      widgets.add(
+        Text(para, style: TextStyle(font: ttf, lineSpacing: spacing)),
+      );
+      widgets.add(
+        SizedBox(height: 30),
+      );
+    }
+
+    pdf.addPage(MultiPage(build: (Context context) => widgets));
+  });
+
+  test('Text Widgets wordSpacing', () {
+    final String para = LoremText().paragraph(40);
+
+    final List<Widget> widgets = <Widget>[];
+    for (double spacing = 0.0; spacing < 10.0; spacing += 2.0) {
+      widgets.add(
+        Text(para, style: TextStyle(font: ttf, wordSpacing: spacing)),
+      );
+      widgets.add(
+        SizedBox(height: 30),
+      );
+    }
+
+    pdf.addPage(MultiPage(build: (Context context) => widgets));
+  });
+
+  test('Text Widgets letterSpacing', () {
+    final String para = LoremText().paragraph(40);
+
+    final List<Widget> widgets = <Widget>[];
+    for (double spacing = 0.0; spacing < 10.0; spacing += 2.0) {
+      widgets.add(
+        Text(para, style: TextStyle(font: ttf, letterSpacing: spacing)),
+      );
+      widgets.add(
+        SizedBox(height: 30),
+      );
+    }
+
+    pdf.addPage(MultiPage(build: (Context context) => widgets));
+  });
+
+  test('Text Widgets background', () {
+    final String para = LoremText().paragraph(40);
+    pdf.addPage(MultiPage(
+        build: (Context context) => <Widget>[
+              Text(
+                para,
+                style: TextStyle(
+                  font: ttf,
+                  background: PdfColors.purple50,
+                ),
+              ),
+            ]));
+  });
+
+  test('Text Widgets RichText', () {
+    final math.Random rnd = math.Random(42);
+    final String para = LoremText(random: rnd).paragraph(40);
+
+    final List<TextSpan> spans = <TextSpan>[];
+    for (String word in para.split(' ')) {
+      spans.add(
+        TextSpan(
+          text: '$word',
+          style: TextStyle(
+              font: ttf,
+              fontSize: rnd.nextDouble() * 20 + 20,
+              color:
+                  PdfColors.primaries[rnd.nextInt(PdfColors.primaries.length)]),
+        ),
+      );
+      spans.add(const TextSpan(text: ' '));
+    }
+
+    pdf.addPage(MultiPage(
+        build: (Context context) => <Widget>[
+              RichText(
+                text: TextSpan(
+                  text: 'Hello ',
+                  style: TextStyle(
+                    font: ttf,
+                    fontSize: 20,
+                  ),
+                  children: <TextSpan>[
+                    TextSpan(
+                        text: 'bold',
+                        style: TextStyle(
+                            font: ttfBold,
+                            fontSize: 40,
+                            color: PdfColors.blue)),
+                    TextSpan(
+                      text: ' world!\n',
+                      children: spans,
+                    ),
+                  ],
+                ),
+              ),
+            ]));
+  });
+
+  tearDownAll(() {
+    final File file = File('widgets-text.pdf');
+    file.writeAsBytesSync(pdf.save());
+  });
+}