Split classes test from html/element_test

tests/html/element_classes_test.dart

+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#library('ElementTest');
+#import('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+
+  Element makeElement() => new Element.tag('div');
+
+  Element makeElementWithChildren() =>
+    new Element.html("<div><br/><img/><input/></div>");
+
+  Element makeElementWithClasses() =>
+    new Element.html('<div class="foo bar baz"></div>');
+
+  Set<String> makeClassSet() => makeElementWithClasses().classes;
+
+  Set<String> extractClasses(Element el) {
+    final match = new RegExp('class="([^"]+)"').firstMatch(el.outerHTML);
+    return new Set.from(match[1].split(' '));
+  }
+
+  test('affects the "class" attribute', () {
+    final el = makeElementWithClasses();
+    el.classes.add('qux');
+    Expect.setEquals(['foo', 'bar', 'baz', 'qux'], extractClasses(el));
+  });
+
+  test('is affected by the "class" attribute', () {
+    final el = makeElementWithClasses();
+    el.attributes['class'] = 'foo qux';
+    Expect.setEquals(['foo', 'qux'], el.classes);
+  });
+
+  test('classes=', () {
+    final el = makeElementWithClasses();
+    el.classes = ['foo', 'qux'];
+    Expect.setEquals(['foo', 'qux'], el.classes);
+    Expect.setEquals(['foo', 'qux'], extractClasses(el));
+  });
+
+  test('toString', () {
+    Expect.setEquals(['foo', 'bar', 'baz'],
+        makeClassSet().toString().split(' '));
+    Expect.equals('', makeElement().classes.toString());
+  });
+
+  test('forEach', () {
+    final classes = <String>[];
+    // TODO: Change to this when Issue 3484 is fixed.
+    //    makeClassSet().forEach(classes.add);
+    makeClassSet().forEach((c) => classes.add(c));
+    Expect.setEquals(['foo', 'bar', 'baz'], classes);
+  });
+
+  test('iterator', () {
+    final classes = <String>[];
+    for (var el in makeClassSet()) {
+      classes.add(el);
+    }
+    Expect.setEquals(['foo', 'bar', 'baz'], classes);
+  });
+
+  test('map', () {
+    Expect.setEquals(['FOO', 'BAR', 'BAZ'],
+        makeClassSet().map((c) => c.toUpperCase()));
+  });
+
+  test('filter', () {
+    Expect.setEquals(['bar', 'baz'],
+        makeClassSet().filter((c) => c.contains('a')));
+  });
+
+  test('every', () {
+    Expect.isTrue(makeClassSet().every((c) => c is String));
+    Expect.isFalse(
+        makeClassSet().every((c) => c.contains('a')));
+  });
+
+  test('some', () {
+    Expect.isTrue(
+        makeClassSet().some((c) => c.contains('a')));
+    Expect.isFalse(makeClassSet().some((c) => c is num));
+  });
+
+  test('isEmpty', () {
+    Expect.isFalse(makeClassSet().isEmpty());
+    Expect.isTrue(makeElement().classes.isEmpty());
+  });
+
+  test('length', () {
+    Expect.equals(3, makeClassSet().length);
+    Expect.equals(0, makeElement().classes.length);
+  });
+
+  test('contains', () {
+    Expect.isTrue(makeClassSet().contains('foo'));
+    Expect.isFalse(makeClassSet().contains('qux'));
+  });
+
+  test('add', () {
+    final classes = makeClassSet();
+    classes.add('qux');
+    Expect.setEquals(['foo', 'bar', 'baz', 'qux'], classes);
+
+    classes.add('qux');
+    final list = new List.from(classes);
+    list.sort((a, b) => a.compareTo(b));
+    Expect.listEquals(['bar', 'baz', 'foo', 'qux'], list,
+        "The class set shouldn't have duplicate elements.");
+  });
+
+  test('remove', () {
+    final classes = makeClassSet();
+    classes.remove('bar');
+    Expect.setEquals(['foo', 'baz'], classes);
+    classes.remove('qux');
+    Expect.setEquals(['foo', 'baz'], classes);
+  });
+
+  test('addAll', () {
+    final classes = makeClassSet();
+    classes.addAll(['bar', 'qux', 'bip']);
+    Expect.setEquals(['foo', 'bar', 'baz', 'qux', 'bip'], classes);
+  });
+
+  test('removeAll', () {
+    final classes = makeClassSet();
+    classes.removeAll(['bar', 'baz', 'qux']);
+    Expect.setEquals(['foo'], classes);
+  });
+
+  test('isSubsetOf', () {
+    final classes = makeClassSet();
+    Expect.isTrue(classes.isSubsetOf(['foo', 'bar', 'baz']));
+    Expect.isTrue(classes.isSubsetOf(['foo', 'bar', 'baz', 'qux']));
+    Expect.isFalse(classes.isSubsetOf(['foo', 'bar', 'qux']));
+  });
+
+  test('containsAll', () {
+    final classes = makeClassSet();
+    Expect.isTrue(classes.containsAll(['foo', 'baz']));
+    Expect.isFalse(classes.containsAll(['foo', 'qux']));
+  });
+
+  test('intersection', () {
+    final classes = makeClassSet();
+    Expect.setEquals(['foo', 'baz'],
+        classes.intersection(['foo', 'qux', 'baz']));
+  });
+
+  test('clear', () {
+    final classes = makeClassSet();
+    classes.clear();
+    Expect.setEquals([], classes);
+  });
+}