Issue #2838283 by MegaChriz: Fixed failing test FeedsMapperDateMultipleTestCase::test().

tests/feeds/multi-date.xml

@@ -3,8 +3,8 @@
    <item>
       <title>2 date values</title>
       <guid>123456789</guid>
-      <date>Wed, 06 Jan 2010 15:05:00 GMT+00:00</date>
-      <date>Thu, 07 Jan 2010 15:08:00 GMT+00:00</date>
+      <date>Wed, 06 Jan 2010 15:00:00 GMT+00:00</date>
+      <date>Thu, 07 Jan 2010 15:15:00 GMT+00:00</date>
    </item>
    <item>
       <title>4 date values</title>

tests/feeds_mapper_date_multiple.test

@@ -112,7 +112,22 @@ class FeedsMapperDateMultipleTestCase extends FeedsMapperTestCase {
     foreach ($values as $v => $key) {
       $this->drupalGet("node/$v/edit");
       foreach ($key as $delta => $value) {
-        $this->assertFieldById('edit-field-date-und-' . $delta . '-value-date', $value);
+        $id = 'edit-field-date-und-' . $delta . '-value-date';
+
+        // Find actual value.
+        $xpath = $this->constructFieldXpath('id', $id);
+        $fields = $this->xpath($xpath);
+        $field = reset($fields);
+        $actual = (string) $field['value'];
+
+        // Compose assert message.
+        $message = format_string('Found field by id @id with value @value (actual: @actual).', array(
+          '@id' => $id,
+          '@value' => $value,
+          '@actual' => $actual,
+        ));
+
+        $this->assertFieldById($id, $value, $message);
       }
     }
   }