Fix behavior of ReactDOMSelect with defaultValue

src/dom/components/ReactDOMSelect.js

@@ -58,11 +58,9 @@ function selectValueType(props, propName, componentName) {
  */
 function updateOptions() {
   /*jshint validthis:true */
-  if (this.props.value == null) {
-    return;
-  }
+  var value = this.props.value != null ? this.props.value : this.state.value;
   var options = this.getDOMNode().options;
-  var selectedValue = '' + this.props.value;
+  var selectedValue = '' + value;
 
   for (var i = 0, l = options.length; i < l; i++) {
     var selected = this.props.multiple ?

src/dom/components/__tests__/ReactDOMSelect-test.js

@@ -0,0 +1,157 @@
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * 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.
+ *
+ * @jsx React.DOM
+ * @emails react-core
+ */
+
+"use strict";
+
+/*jshint evil:true */
+
+describe('ReactDOMSelect', function() {
+  var React;
+  var ReactTestUtils;
+
+  var renderSelect;
+
+  beforeEach(function() {
+    React = require('React');
+    ReactTestUtils = require('ReactTestUtils');
+
+    renderSelect = function(component) {
+      var stub = ReactTestUtils.renderIntoDocument(component);
+      var node = stub.getDOMNode();
+      return node;
+    };
+  });
+
+  it('should allow setting `defaultValue`', function() {
+    var stub =
+      <select defaultValue="giraffe">
+        <option value="monkey">A monkey!</option>
+        <option value="giraffe">A giraffe!</option>
+        <option value="gorilla">A gorilla!</option>
+      </select>;
+    var node = renderSelect(stub);
+
+    expect(node.value).toBe('giraffe');
+
+    // Changing `defaultValue` should do nothing.
+    stub.setProps({defaultValue: 'gorilla'});
+    expect(node.value).toEqual('giraffe');
+  });
+
+  it('should allow setting `defaultValue` with multiple', function() {
+    var stub =
+      <select multiple={true} defaultValue={['giraffe', 'gorilla']}>
+        <option value="monkey">A monkey!</option>
+        <option value="giraffe">A giraffe!</option>
+        <option value="gorilla">A gorilla!</option>
+      </select>;
+    var node = renderSelect(stub);
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(true);  // gorilla
+
+    // Changing `defaultValue` should do nothing.
+    stub.setProps({defaultValue: ['monkey']});
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(true);  // gorilla
+  });
+
+  it('should allow setting `value`', function() {
+    var stub =
+      <select value="giraffe">
+        <option value="monkey">A monkey!</option>
+        <option value="giraffe">A giraffe!</option>
+        <option value="gorilla">A gorilla!</option>
+      </select>;
+    var node = renderSelect(stub);
+
+    expect(node.value).toBe('giraffe');
+
+    // Changing the `value` prop should change the selected option.
+    stub.setProps({value: 'gorilla'});
+    expect(node.value).toEqual('gorilla');
+  });
+
+  it('should allow setting `value` with multiple', function() {
+    var stub =
+      <select multiple={true} value={['giraffe', 'gorilla']}>
+        <option value="monkey">A monkey!</option>
+        <option value="giraffe">A giraffe!</option>
+        <option value="gorilla">A gorilla!</option>
+      </select>;
+    var node = renderSelect(stub);
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(true);  // gorilla
+
+    // Changing the `value` prop should change the selected options.
+    stub.setProps({value: ['monkey']});
+
+    expect(node.options[0].selected).toBe(true);  // monkey
+    expect(node.options[1].selected).toBe(false);  // giraffe
+    expect(node.options[2].selected).toBe(false);  // gorilla
+  });
+
+  it('should allow switching to multiple', function() {
+    var stub =
+      <select defaultValue="giraffe">
+        <option value="monkey">A monkey!</option>
+        <option value="giraffe">A giraffe!</option>
+        <option value="gorilla">A gorilla!</option>
+      </select>;
+    var node = renderSelect(stub);
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(false);  // gorilla
+
+    // When making it multiple, giraffe should still be selected
+    stub.setProps({multiple: true, defaultValue: null});
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(false);  // gorilla
+  });
+
+  it('should allow switching from multiple', function() {
+    var stub =
+      <select multiple={true} defaultValue={['giraffe', 'gorilla']}>
+        <option value="monkey">A monkey!</option>
+        <option value="giraffe">A giraffe!</option>
+        <option value="gorilla">A gorilla!</option>
+      </select>;
+    var node = renderSelect(stub);
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(true);  // gorilla
+
+    // When removing multiple, giraffe should still be selected (but gorilla
+    // will no longer be)
+    stub.setProps({multiple: false, defaultValue: null});
+
+    expect(node.options[0].selected).toBe(false);  // monkey
+    expect(node.options[1].selected).toBe(true);  // giraffe
+    expect(node.options[2].selected).toBe(false);  // gorilla
+  });
+});