MDL-74435 user: Trim whitespace from user search fields

user/filters/text.php

@@ -105,6 +105,12 @@ public function check_data($formdata) {
             $fieldvalue = null;
             if (isset($formdata->$field)) {
                 $fieldvalue = $formdata->$field;
+
+                // If we aren't doing a whitespace comparison, an exact match, trim will give us a better result set.
+                $trimmed = trim($fieldvalue);
+                if ($trimmed !== '' && $formdata->$operator != 2) {
+                    $fieldvalue = $trimmed;
+                }
             }
             return array('operator' => (int)$formdata->$operator, 'value' => $fieldvalue);
         }

user/tests/behat/filter_trim.feature

@@ -0,0 +1,37 @@
+@core @core_user
+Feature: Trim entered user filters
+  As a system administrator
+  I need to be able to filter users ignoring whitespace
+  So that I can find users even when entered data has surrounding whitespace.
+
+  Background:
+    Given the following "users" exist:
+      | username | firstname | lastname | email | idnumber |
+      | teacher1 | Teacher  | 1 | teacher@example.com  | 0000002 |
+      | student1 | Student1 | 1 | student1@example.com | 0000003 |
+    And I log in as "admin"
+    And I navigate to "Users > Accounts > Browse list of users" in site administration
+
+  @javascript
+  Scenario: Filtering username - with case "contains"
+    When I set the field "id_realname_op" to "contains"
+    And I set the field "id_realname" to " Teacher "
+    And I press "Add filter"
+    # We should see the teacher user, with the trimmmed string present.
+    Then I should see "User full name contains \"Teacher\""
+    And I should see "Teacher" in the "users" "table"
+    And I should not see "Student1" in the "users" "table"
+
+  @javascript
+  Scenario: Filtering username - with case "contains" and a whitespace string
+    When I set the field "id_realname_op" to "contains"
+    And I set the field "id_realname" to "  "
+    And I press "Add filter"
+    Then I should see "User full name contains \"  \""
+
+  @javascript
+  Scenario: Filtering username - with case "is equal to"
+    When I set the field "id_realname_op" to "is equal to"
+    And I set the field "id_realname" to " Teacher"
+    And I press "Add filter"
+    Then I should see "User full name is equal to \" Teacher\""