Add return code integration tests

Author: mtodd

test/integration/test_return_codes.rb

@@ -0,0 +1,38 @@
+require_relative '../test_helper'
+
+# NOTE: These tests depend on the OpenLDAP retcode overlay.
+# See: section 12.12 http://www.openldap.org/doc/admin24/overlays.html
+
+class TestReturnCodeIntegration < LDAPIntegrationTestCase
+  def test_operations_error
+    refute @ldap.search(filter: "cn=operationsError", base: "ou=Retcodes,dc=rubyldap,dc=com")
+    assert result = @ldap.get_operation_result
+
+    assert_equal 1, result.code
+    assert_equal Net::LDAP::ResultStrings[1], result.message
+  end
+
+  def test_protocol_error
+    refute @ldap.search(filter: "cn=protocolError", base: "ou=Retcodes,dc=rubyldap,dc=com")
+    assert result = @ldap.get_operation_result
+
+    assert_equal 2, result.code
+    assert_equal Net::LDAP::ResultStrings[2], result.message
+  end
+
+  def test_time_limit_exceeded
+    refute @ldap.search(filter: "cn=timeLimitExceeded", base: "ou=Retcodes,dc=rubyldap,dc=com")
+    assert result = @ldap.get_operation_result
+
+    assert_equal 3, result.code
+    assert_equal Net::LDAP::ResultStrings[3], result.message
+  end
+
+  def test_size_limit_exceeded
+    refute @ldap.search(filter: "cn=sizeLimitExceeded", base: "ou=Retcodes,dc=rubyldap,dc=com")
+    assert result = @ldap.get_operation_result
+
+    assert_equal 4, result.code
+    assert_equal Net::LDAP::ResultStrings[4], result.message
+  end
+end