Implement Model-Driven-Views spec for Dart

tests/html/element_bindings_test.dart

+// Copyright (c) 2013, 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 node_bindings_test;
+
+import 'dart:async';
+import 'dart:html';
+import 'dart:observe';
+import '../../pkg/unittest/lib/unittest.dart';
+import '../../pkg/unittest/lib/html_config.dart';
+
+// Note: this file ported from
+// https://github.com/toolkitchen/mdv/blob/master/tests/element_bindings.js
+
+main() {
+  useHtmlConfiguration();
+  group('Element Bindings', elementBindingTests);
+}
+
+elementBindingTests() {
+  var testDiv;
+
+  setUp(() {
+    document.body.nodes.add(testDiv = new DivElement());
+  });
+
+  tearDown(() {
+    testDiv.remove();
+    testDiv = null;
+  });
+
+  dispatchEvent(type, target) {
+    target.dispatchEvent(new Event(type, cancelable: false));
+  }
+
+  test('Text', () {
+    var template = new Element.html('<template bind>{{a}} and {{b}}');
+    testDiv.nodes.add(template);
+    var model = toObservable({'a': 1, 'b': 2});
+    template.model = model;
+    deliverChangeRecords();
+    var text = testDiv.nodes[1];
+    expect(text.text, '1 and 2');
+
+    model['a'] = 3;
+    deliverChangeRecords();
+    expect(text.text, '3 and 2');
+  });
+
+  test('SimpleBinding', () {
+    var el = new DivElement();
+    var model = toObservable({'a': '1'});
+    el.bind('foo', model, 'a');
+    deliverChangeRecords();
+    expect(el.attributes['foo'], '1');
+
+    model['a'] = '2';
+    deliverChangeRecords();
+    expect(el.attributes['foo'], '2');
+
+    model['a'] = 232.2;
+    deliverChangeRecords();
+    expect(el.attributes['foo'], '232.2');
+
+    model['a'] = 232;
+    deliverChangeRecords();
+    expect(el.attributes['foo'], '232');
+
+    model['a'] = null;
+    deliverChangeRecords();
+    expect(el.attributes['foo'], '');
+  });
+
+  test('SimpleBindingWithDashes', () {
+    var el = new DivElement();
+    var model = toObservable({'a': '1'});
+    el.bind('foo-bar', model, 'a');
+    deliverChangeRecords();
+    expect(el.attributes['foo-bar'], '1');
+
+    model['a'] = '2';
+    deliverChangeRecords();
+    expect(el.attributes['foo-bar'], '2');
+  });
+
+  test('SimpleBindingWithComment', () {
+    var el = new DivElement();
+    el.innerHtml = '<!-- Comment -->';
+    var model = toObservable({'a': '1'});
+    el.bind('foo-bar', model, 'a');
+    deliverChangeRecords();
+    expect(el.attributes['foo-bar'], '1');
+
+    model['a'] = '2';
+    deliverChangeRecords();
+    expect(el.attributes['foo-bar'], '2');
+  });
+
+  test('PlaceHolderBindingText', () {
+    var model = toObservable({
+      'adj': 'cruel',
+      'noun': 'world'
+    });
+
+    var el = new DivElement();
+    el.text = 'dummy';
+    el.nodes.first.text = 'Hello {{ adj }} {{noun}}!';
+    var template = new Element.html('<template bind>');
+    template.content.nodes.add(el);
+    testDiv.nodes.add(template);
+    template.model = model;
+
+    deliverChangeRecords();
+    el = testDiv.nodes[1].nodes.first;
+    expect(el.text, 'Hello cruel world!');
+
+    model['adj'] = 'happy';
+    deliverChangeRecords();
+    expect(el.text, 'Hello happy world!');
+  });
+
+  test('InputElementTextBinding', () {
+    var model = toObservable({'val': 'ping'});
+
+    var el = new InputElement();
+    el.bind('value', model, 'val');
+    deliverChangeRecords();
+    expect(el.value, 'ping');
+
+    el.value = 'pong';
+    dispatchEvent('input', el);
+    expect(model['val'], 'pong');
+
+    // Try a deep path.
+    model = toObservable({'a': {'b': {'c': 'ping'}}});
+
+    el.bind('value', model, 'a.b.c');
+    deliverChangeRecords();
+    expect(el.value, 'ping');
+
+    el.value = 'pong';
+    dispatchEvent('input', el);
+    expect(observePath(model, 'a.b.c').value, 'pong');
+
+    // Start with the model property being absent.
+    model['a']['b'].remove('c');
+    deliverChangeRecords();
+    expect(el.value, '');
+
+    el.value = 'pong';
+    dispatchEvent('input', el);
+    expect(observePath(model, 'a.b.c').value, 'pong');
+    deliverChangeRecords();
+
+    // Model property unreachable (and unsettable).
+    model['a'].remove('b');
+    deliverChangeRecords();
+    expect(el.value, '');
+
+    el.value = 'pong';
+    dispatchEvent('input', el);
+    expect(observePath(model, 'a.b.c').value, null);
+  });
+
+  test('InputElementCheckbox', () {
+    var model = toObservable({'val': true});
+
+    var el = new InputElement();
+    testDiv.nodes.add(el);
+    el.type = 'checkbox';
+    el.bind('checked', model, 'val');
+    deliverChangeRecords();
+    expect(el.checked, true);
+
+    model['val'] = false;
+    deliverChangeRecords();
+    expect(el.checked, false);
+
+    el.click();
+    expect(model['val'], true);
+
+    el.click();
+    expect(model['val'], false);
+  });
+
+  test('InputElementRadio', () {
+    var model = toObservable({'val1': true, 'val2': false, 'val3': false,
+        'val4': true});
+    var RADIO_GROUP_NAME = 'test';
+
+    var container = testDiv;
+
+    var el1 = new InputElement();
+    testDiv.nodes.add(el1);
+    el1.type = 'radio';
+    el1.name = RADIO_GROUP_NAME;
+    el1.bind('checked', model, 'val1');
+
+    var el2 = new InputElement();
+    testDiv.nodes.add(el2);
+    el2.type = 'radio';
+    el2.name = RADIO_GROUP_NAME;
+    el2.bind('checked', model, 'val2');
+
+    var el3 = new InputElement();
+    testDiv.nodes.add(el3);
+    el3.type = 'radio';
+    el3.name = RADIO_GROUP_NAME;
+    el3.bind('checked', model, 'val3');
+
+    var el4 = new InputElement();
+    testDiv.nodes.add(el4);
+    el4.type = 'radio';
+    el4.name = 'othergroup';
+    el4.bind('checked', model, 'val4');
+
+    deliverChangeRecords();
+    expect(el1.checked, true);
+    expect(el2.checked, false);
+    expect(el3.checked, false);
+    expect(el4.checked, true);
+
+    model['val1'] = false;
+    model['val2'] = true;
+    deliverChangeRecords();
+    expect(el1.checked, false);
+    expect(el2.checked, true);
+    expect(el3.checked, false);
+    expect(el4.checked, true);
+
+    el1.checked = true;
+    dispatchEvent('change', el1);
+    expect(model['val1'], true);
+    expect(model['val2'], false);
+    expect(model['val3'], false);
+    expect(model['val4'], true);
+
+    el3.checked = true;
+    dispatchEvent('change', el3);
+    expect(model['val1'], false);
+    expect(model['val2'], false);
+    expect(model['val3'], true);
+    expect(model['val4'], true);
+  });
+
+  test('InputElementRadioMultipleForms', () {
+    var model = toObservable({'val1': true, 'val2': false, 'val3': false,
+        'val4': true});
+    var RADIO_GROUP_NAME = 'test';
+
+    var form1 = new FormElement();
+    testDiv.nodes.add(form1);
+    var form2 = new FormElement();
+    testDiv.nodes.add(form2);
+
+    var el1 = new InputElement();
+    form1.nodes.add(el1);
+    el1.type = 'radio';
+    el1.name = RADIO_GROUP_NAME;
+    el1.bind('checked', model, 'val1');
+
+    var el2 = new InputElement();
+    form1.nodes.add(el2);
+    el2.type = 'radio';
+    el2.name = RADIO_GROUP_NAME;
+    el2.bind('checked', model, 'val2');
+
+    var el3 = new InputElement();
+    form2.nodes.add(el3);
+    el3.type = 'radio';
+    el3.name = RADIO_GROUP_NAME;
+    el3.bind('checked', model, 'val3');
+
+    var el4 = new InputElement();
+    form2.nodes.add(el4);
+    el4.type = 'radio';
+    el4.name = RADIO_GROUP_NAME;
+    el4.bind('checked', model, 'val4');
+
+    deliverChangeRecords();
+    expect(el1.checked, true);
+    expect(el2.checked, false);
+    expect(el3.checked, false);
+    expect(el4.checked, true);
+
+    el2.checked = true;
+    dispatchEvent('change', el2);
+    expect(model['val1'], false);
+    expect(model['val2'], true);
+
+    // Radio buttons in form2 should be unaffected
+    expect(model['val3'], false);
+    expect(model['val4'], true);
+
+    el3.checked = true;
+    dispatchEvent('change', el3);
+    expect(model['val3'], true);
+    expect(model['val4'], false);
+
+    // Radio buttons in form1 should be unaffected
+    expect(model['val1'], false);
+    expect(model['val2'], true);
+  });
+
+  test('BindToChecked', () {
+    var div = new DivElement();
+    testDiv.nodes.add(div);
+    var child = new DivElement();
+    div.nodes.add(child);
+    var input = new InputElement();
+    child.nodes.add(input);
+    input.type = 'checkbox';
+
+    var model = toObservable({'a': {'b': false}});
+    input.bind('checked', model, 'a.b');
+
+    input.click();
+    expect(model['a']['b'], true);
+
+    input.click();
+    expect(model['a']['b'], false);
+  });
+
+  test('MultipleReferences', () {
+    var el = new DivElement();
+    var template = new Element.html('<template bind>');
+    template.content.nodes.add(el);
+    testDiv.nodes.add(template);
+
+    var model = toObservable({'foo': 'bar'});
+    el.attributes['foo'] = '{{foo}} {{foo}}';
+    template.model = model;
+
+    deliverChangeRecords();
+    el = testDiv.nodes[1];
+    expect(el.attributes['foo'], 'bar bar');
+  });
+}