improve unit test coverage (#8)

tests/Ltb/AttributeValueTest.php

@@ -3,9 +3,6 @@
 require __DIR__ . '/../../vendor/autoload.php';
 use PHPUnit\Framework\TestCase;
 
-// global variable for ldap_get_mail_for_notification function
-$GLOBALS['mail_attributes'] = array("mail");
-
 final class AttributeValueTest extends \Mockery\Adapter\Phpunit\MockeryTestCase
 {
 
@@ -29,9 +26,28 @@ public function test_ldap_get_first_available_value(): void
 
     }
 
+    public function test_ldap_get_first_available_value_empty(): void
+    {
+
+        $phpLDAPMock = Mockery::mock('overload:Ltb\PhpLDAP');
+        $phpLDAPMock->shouldreceive([
+                                      'ldap_get_attributes' => ['cn'],
+                                      'ldap_get_values' => [
+                                                             'count' => 0
+                                                           ]
+                                    ]);
+
+        $ent = Ltb\AttributeValue::ldap_get_first_available_value(null, null, ['cn']);
+        $this->assertFalse($ent, "not getting false result whereas no value has been returned");
+
+    }
+
     public function test_ldap_get_mail_for_notification(): void
     {
 
+        // global variable for ldap_get_mail_for_notification function
+        $GLOBALS['mail_attributes'] = array("mail");
+
         $phpLDAPMock = Mockery::mock('overload:Ltb\PhpLDAP');
         $phpLDAPMock->shouldreceive([
                                       'ldap_get_attributes' => ['mail'],
@@ -42,9 +58,30 @@ public function test_ldap_get_mail_for_notification(): void
                                                            ]
                                     ]);
 
-        # Test ldap_get_first_available_value
+        # Test ldap_get_mail_for_notification
         $mail = Ltb\AttributeValue::ldap_get_mail_for_notification(null, null);
         $this->assertEquals('[email protected]', $mail, "not getting [email protected] as mail for notification");
     }
 
+    public function test_ldap_get_proxy_for_notification(): void
+    {
+
+        // global variable for ldap_get_mail_for_notification function
+        $GLOBALS['mail_attributes'] = array("proxyAddresses");
+
+        $phpLDAPMock = Mockery::mock('overload:Ltb\PhpLDAP');
+        $phpLDAPMock->shouldreceive([
+                                      'ldap_get_attributes' => ['proxyAddresses'],
+                                      'ldap_get_values' => [
+                                                             'count' => 2,
+                                                             0 => 'smtp:[email protected]',
+                                                             1 => 'smtp:[email protected]'
+                                                           ]
+                                    ]);
+
+        # Test ldap_get_mail_for_notification
+        $mail = Ltb\AttributeValue::ldap_get_mail_for_notification(null, null);
+        $this->assertEquals('[email protected]', $mail, "not getting [email protected] as proxyAddress for notification");
+    }
+
 }