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Manual Reference Pages  -  NET::DBUS::TEST::MOCKOBJECT (3)

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NAME

Net::DBus::Test::MockObject - Fake an object from the bus for unit testing

CONTENTS

SYNOPSIS



  use Net::DBus;
  use Net::DBus::Test::MockObject;

  my $bus = Net::DBus->test

  # Lets fake presence of HAL...

  # First we need to define the service
  my $service = $bus->export_service("org.freedesktop.Hal");

  # Then create a mock object
  my $object = Net::DBus::Test::MockObject->new($service,
                                                "/org/freedesktop/Hal/Manager");

  # Fake the GetAllDevices method
  $object->seed_action("org.freedesktop.Hal.Manager",
                       "GetAllDevices",
                       reply => {
                         return => [ "/org/freedesktop/Hal/devices/computer_i8042_Aux_Port",
                                     "/org/freedesktop/Hal/devices/computer_i8042_Aux_Port_logicaldev_input",
                                     "/org/freedesktop/Hal/devices/computer_i8042_Kbd_Port",
                                     "/org/freedesktop/Hal/devices/computer_i8042_Kbd_Port_logicaldev_input"
                         ],
                       });


  # Now can test any class which calls out to GetAllDevices in HAL
  ....test stuff....



DESCRIPTION

This provides an alternate for Net::DBus::Object to enable bus objects to be quickly mocked up, thus facilitating creation of unit tests for services which may need to call out to objects provided by 3rd party services on the bus. It is typically used as a companion to the Net::DBus::MockBus object, to enable complex services to be tested without actually starting a real bus.

!!!!! WARNING !!!

This object & its APIs should be considered very experimental at this point in time, and no guarentees about future API compatibility are provided what-so-ever. Comments & suggestions on how to evolve this framework are, however, welcome & encouraged.

METHODS

my $object = Net::DBus::Test::MockObject->new($service, $path, $interface); Create a new mock object, attaching to the service defined by the $service parameter. This would be an instance of the Net::DBus::Service object. The $path parameter defines the object path at which to attach this mock object, and $interface defines the interface it will support.
my $service = $object->get_service Retrieves the Net::DBus::Service object within which this object is exported.
my $path = $object->get_object_path Retrieves the path under which this object is exported
my $msg = $object->get_last_message Retrieves the last message processed by this object. The returned object is an instance of Net::DBus::Binding::Message
my $sig = $object->get_last_message_signature Retrieves the type signature of the last processed message.
my $value = $object->get_last_message_param Returns the first value supplied as an argument to the last processed message.
my @values = $object->get_last_message_param_list Returns a list of all the values supplied as arguments to the last processed message.
$object->seed_action($interface, $method, %action); Registers an action to be performed when a message corresponding to the method $method within the interface $interface is received. The %action parameter can have a number of possible keys set:
signals Causes a signal to be emitted when the method is invoked. The value associated with this key should be an instance of the Net::DBus::Binding::Message::Signal class.
error Causes an error to be generated when the method is invoked. The value associated with this key should be a hash reference, with two elements. The first, name, giving the error name, and the second, description, providing the descriptive text.
reply Causes a normal method return to be generated. The value associated with this key should be an array reference, whose elements are the values to be returned by the method.

BUGS

It doesn’t completely replicate the API of Net::DBus::Binding::Object, merely enough to make the high level bindings work in a test scenario.

AUTHOR

Daniel P. Berrange

COPYRIGHT

Copyright (C) 2004-2009 Daniel P. Berrange

SEE ALSO

Net::DBus, Net::DBus::Object, Net::DBus::Test::MockConnection, <http://www.mockobjects.com/Faq.html>
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perl v5.20.3 NET::DBUS::TEST::MOCKOBJECT (3) 2015-03-16

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