Dates are no longer considered empty

index.html

@@ -382,6 +382,7 @@
           <li><a href="#utilities-format">format</a></li>
           <li><a href="#utilities-get-deep-object-value">getDeepObjectValue</a></li>
           <li><a href="#utilities-is-array">isArray</a></li>
+          <li><a href="#utilities-is-date">isDate</a></li>
           <li><a href="#utilities-is-defined">isDefined</a></li>
           <li><a href="#utilities-is-dom-element">isDomElement</a></li>
           <li><a href="#utilities-is-empty">isEmpty</a></li>
@@ -398,6 +399,7 @@
       <li>
         <a href="#changelog">Changelog</a>
         <ul>
+          <li><a href="#changelog-wip">WIP</a></li>
           <li><a href="#changelog-0-7-0">0.7.0</a></li>
           <li><a href="#changelog-0-6-1">0.6.1</a></li>
           <li><a href="#changelog-0-6-0">0.6.0</a></li>
@@ -1741,6 +1743,23 @@ <h2>Utilities</h2>
 
 validate.isArray([]);
 // =&gt; true</code></pre>
+          </div>
+          <div id="utilities-is-date">
+            <div class="signature">
+              <b>isDate</b>
+              <code>validate.isDate(value)</code>
+            </div>
+            <p class="description">
+              Check if the given value is a <code>Date</code> instance.
+            </p>
+            <pre><code class="javascript">validate.isDate(new Date());
+// =&gt; true
+
+validate.isDate(null);
+// =&gt; false
+
+validate.isDate({});
+// =&gt; false</code></pre>
           </div>
           <div id="utilities-is-defined">
             <div class="signature">
@@ -1977,6 +1996,19 @@ <h2>Utilities</h2>
         </div>
         <div id="changelog">
           <h2>Changelog</h2>
+          <div id="changelog-wip">
+            <h3>
+              <b class="version">WIP</b>
+            </h3>
+            <ul>
+              <li>
+                Fixed an issue where dates would not be accepted by the presence
+                validator due to an issue in <code>validate.isEmpty</code>.
+                Thanks <a href="https://github.com/ansman/validate.js/issues/48" target="_blank">Yun Jia</a>
+                for reporting this.
+              </li>
+            </ul>
+          </div>
           <div id="changelog-0-7-0">
             <h3>
               <b class="version">0.7.0</b>

specs/validate-helpers-spec.js

@@ -759,6 +759,18 @@ describe("validate", function() {
     });
   });
 
+  describe("isDate", function() {
+    it("returns true for dates", function() {
+      expect(validate.isDate(new Date())).toBe(true);
+    });
+
+    it("returns false for non dates", function() {
+      expect(validate.isDate(new XDate())).toBe(false);
+      expect(validate.isDate(Date.now())).toBe(false);
+      expect(validate.isDate({})).toBe(false);
+    });
+  });
+
   describe("isEmpty", function() {
     it("considers null and undefined values empty", function() {
       expect(validate.isEmpty(null)).toBe(true);
@@ -790,6 +802,12 @@ describe("validate", function() {
       expect(validate.isEmpty(false)).toBe(false);
       expect(validate.isEmpty(0)).toBe(false);
     });
+
+    it("considers date non empty", function() {
+      spyOn(validate, "isDate").and.callThrough();
+      expect(validate.isEmpty(new Date())).toBe(false);
+      expect(validate.isDate).toHaveBeenCalled();
+    });
   });
 
   describe("collectFormValues", function() {

validate.js

@@ -274,6 +274,11 @@
       return obj === Object(obj);
     },
 
+    // Simply checks if the object is an instance of a date
+    isDate: function(obj) {
+      return obj instanceof Date;
+    },
+
     // Returns false if the object is `null` of `undefined`
     isDefined: function(obj) {
       return obj !== null && obj !== undefined;
@@ -334,6 +339,11 @@
         return value.length === 0;
       }
 
+      // Dates have no attributes but aren't empty
+      if (v.isDate(value)) {
+        return false;
+      }
+
       // If we find at least one property we consider it non empty
       if (v.isObject(value)) {
         for (attr in value) {