Added safe wrapper for toLocateDate() to handle null/invalid dates an…

app/common/lib/formatUtil.js

@@ -84,6 +84,20 @@ module.exports.formatAccelerator = (accelerator) => {
   return result
 }
 
+module.exports.toLocaleString = (epoch, defaultValue) => {
+  if (epoch && typeof epoch === 'number') {
+    try {
+      const date = new Date(epoch).toLocaleString()
+      if (date !== 'Invalid Date') {
+        return date
+      }
+    } catch (e) {
+      console.log('Error parsing date: ', e)
+    }
+  }
+  return defaultValue || ''
+}
+
 /**
  * Clamp values down to a given range (min/max).
  * Value is wrapped when out of bounds. ex:

js/about/bookmarks.js

@@ -14,6 +14,7 @@ const dndData = require('../dndData')
 const cx = require('../lib/classSet')
 const SortableTable = require('../components/sortableTable')
 const siteUtil = require('../state/siteUtil')
+const formatUtil = require('../../app/common/lib/formatUtil')
 const iconSize = require('../../app/common/lib/faviconUtil').iconSize
 
 const ipc = window.chrome.ipc
@@ -340,8 +341,8 @@ class BookmarksList extends ImmutableComponent {
             value: entry.get('customTitle') || entry.get('title') || entry.get('location')
           },
           {
-            html: new Date(entry.get('lastAccessedTime')).toLocaleString(),
-            value: entry.get('lastAccessedTime')
+            html: formatUtil.toLocaleString(entry.get('lastAccessedTime'), ''),
+            value: entry.get('lastAccessedTime') || 0
           }
         ])}
         rowObjects={this.props.bookmarks}

test/unit/lib/formatUtilTest.js

@@ -47,6 +47,30 @@ describe('formatUtil', function () {
     })
   })
 
+  describe('toLocaleString', function () {
+    it('formats the date as a string', function () {
+      const result = formatUtil.toLocaleString(1479159834005)
+      assert.equal(typeof result, 'string')
+      assert.equal(result.length > 0, true)
+    })
+    it('falls back to provided default value if epoch is falsey', function () {
+      const result = formatUtil.toLocaleString(null, 'abc')
+      assert.equal(result, 'abc')
+    })
+    it('falls back to empty string if no default provided and epoch is falsey', function () {
+      const result = formatUtil.toLocaleString()
+      assert.equal(result, '')
+    })
+    it('falls back to default value if invalid date is passed', function () {
+      const result = formatUtil.toLocaleString(NaN, 'def')
+      assert.equal(result, 'def')
+    })
+    it('falls back to default value if a non-number is passed', function () {
+      const result = formatUtil.toLocaleString('this is not a number', 'ghi')
+      assert.equal(result, 'ghi')
+    })
+  })
+
   describe('wrappingClamp', function () {
     it('does not change value if within bounds', function () {
       assert.equal(formatUtil.wrappingClamp(5, 1, 10), 5)