unit tests: added common widget tests. Thanks Scott G.

tests/unit/testsuite.js

@@ -1,3 +1,4 @@
+
 $(function() {
 
 $('body').prepend(
@@ -8,3 +9,85 @@ $('body').prepend(
 );
 
 });
+
+function testWidgetDefaults(widget, defaults) {
+    var pluginDefaults = $.extend({},
+        $.widget.defaults,
+        $.ui[widget].defaults
+    );
+    
+    // ensure that all defualts have the correct value
+    test('defined defaults', function() {
+        $.each(defaults, function(key, val) {
+            same(pluginDefaults[key], val, key);
+        });
+    });
+    
+    // ensure that all defaults were tested
+    test('tested defaults', function() {
+        $.each(pluginDefaults, function(key) {
+            ok(key in defaults, key);
+        });
+    });
+    
+    // defaults after init
+    test('defaults on init', function() {
+        var el = $('<div/>')[widget](),
+            instance = el.data(widget);
+        
+        $.each(defaults, function(key, val) {
+            same(instance.options[key], val, key);
+        });
+        el.remove();
+    });
+}
+
+function testSettingOptions(widget, options) {
+    test('option values', function() {
+        var el = $('<div/>')[widget](),
+            instance = el.data(widget);
+        
+        $.each(options, function(i, option) {
+            $.each({
+                'null': null,
+                'false': false,
+                'true': true,
+                zero: 0,
+                number: 1,
+                'empty string': '',
+                string: 'string',
+                'empty array': [],
+                array: ['array'],
+                'empty object': {},
+                object: {obj: 'ect'},
+                date: new Date(),
+                regexp: /regexp/,
+                'function': function() {}
+            }, function(type, val) {
+                el[widget]('option', option, val);
+                same(instance.options[option], val, option + ': ' + type);
+            });
+        });
+    });
+}
+
+function testWidgetOverrides(widget) {
+    test('$.widget overrides', function() {
+        $.each(['option', '_getData', '_trigger'], function(i, method) {
+            ok($.widget.prototype[method] == $.ui[widget].prototype[method],
+                'should not override ' + method);
+        });
+    });
+}
+function commonWidgetTests(widget, settings) {
+    var options = [];
+    $.each(settings.defaults, function(option) {
+        options.push(option);
+    });
+    
+	module(widget + ": common widget");
+
+    testWidgetDefaults(widget, settings.defaults);
+//    testSettingOptions(widget, options);
+    testWidgetOverrides(widget);
+}