MDL-38619 behat: New test

According to MDLQA-1177, an administrator
can create a cohort and add users to it.

cohort/tests/behat/add_cohort.feature

@@ -0,0 +1,62 @@
+@admin @cohorts
+Feature: Add cohorts of users
+  In order to create site-wide groups
+  As a moodle admin
+  I need to create cohorts and add users on them
+
+  Background:
+    Given the following "users" exists:
+      | username | firstname | lastname | email |
+      | user1 | First | User | first@user.com |
+      | user2 | Second | User | second@user.com |
+      | user3 | Third | User | third@user.com |
+      | user4 | Forth | User | forth@user.com |
+    And I log in as "admin"
+    And I expand "Front page settings" node
+    And I expand "Site administration" node
+    And I expand "Users" node
+    And I expand "Accounts" node
+    And I follow "Cohorts"
+    And I press "Add"
+    And I fill the moodle form with:
+      | Name | Test cohort name |
+      | Context | System |
+      | Cohort ID | 333 |
+      | Description | Test cohort description |
+    And I press "Save changes"
+
+  @javascript
+  Scenario: Add a cohort
+    When I follow "Cohorts"
+    Then I should see "Test cohort name"
+    And I should see "333"
+    And I should see "Test cohort description"
+    And I should see "Created manually"
+
+  @javascript
+  Scenario: Add users to a cohort selecting them from the system users list
+    When I add "user1" user to "333" cohort
+    And I add "user2" user to "333" cohort
+    Then I should see "2" in the "#cohorts" "css_element"
+    And I follow "Assign"
+    And the "Current users" select box should contain "First User ([email protected])"
+    And the "Current users" select box should contain "Second User ([email protected])"
+    And the "Current users" select box should not contain "Forth User ([email protected])"
+
+  @javascript
+  Scenario: Add users to a cohort uploading a users file
+    When I follow "Bulk user actions"
+    And I select "Third User" from "Available"
+    And I press "Add to selection"
+    And I select "Forth User" from "Available"
+    And I press "Add to selection"
+    And I select "Add to cohort" from "id_action"
+    And I press "Go"
+    And I select "Test cohort name [333]" from "Cohort"
+    And I press "Add to cohort"
+    And I follow "Cohorts"
+    Then I should see "2" in the "#cohorts" "css_element"
+    And I follow "Assign"
+    And the "Current users" select box should contain "Third User ([email protected])"
+    And the "Current users" select box should contain "Forth User ([email protected])"
+    And the "Current users" select box should not contain "First User ([email protected])"