README

NAME

    Mock::Quick - Quickly mock objects and classes, even temporarily
    replace them, side-effect free.

DESCRIPTION

    Mock-Quick is here to solve the current problems with Mocking
    libraries.

    There are a couple Mocking libraries available on CPAN. The primary
    problems with these libraries include verbose syntax, and most
    importantly side-effects. Some Mocking libraries expect you to mock a
    specific class, and will unload it then redefine it. This is
    particularly a problem if you only want to override a class on a
    lexical level.

    Mock-Quick provides a declarative mocking interface that results in a
    very concise, but clear syntax. There are separate facilities for
    mocking object instances, and classes. You can quickly create an
    instance of an object with custom attributes and methods. You can also
    quickly create an anonymous class, optionally inheriting from another,
    with whatever methods you desire.

    Mock-Quick also provides a tool that provides an OO interface to
    overriding methods in existing classes. This tool also allows for the
    restoration of the original class methods. Best of all this is a
    localized tool, when your control object falls out of scope the
    original class is restored.

SYNOPSIS

 MOCKING OBJECTS

        use Mock::Quick;
    
        my $obj = qobj(
            foo => 'bar',            # define attribute
            do_it => qmeth { ... },  # define method
            ...
        );
    
        is( $obj->foo, 'bar' );
        $obj->foo( 'baz' );
        is( $obj->foo, 'baz' );
    
        $obj->do_it();
    
        # define the new attribute automatically
        $obj->bar( 'xxx' );
    
        # define a new method on the fly
        $obj->baz( qmeth { ... });
    
        # remove an attribute or method
        $obj->baz( qclear() );

 STRICTER MOCK

        use Mock::Quick;
    
        my $obj = qstrict(
            foo => 'bar',            # define attribute
            do_it => qmeth { ... },  # define method
            ...
        );
    
        is( $obj->foo, 'bar' );
        $obj->foo( 'baz' );
        is( $obj->foo, 'baz' );
    
        $obj->do_it();
    
        # remove an attribute or method
        $obj->baz( qclear() );

    You can no longer auto-vivify accessors and methods in strict mode:

        # Cannot define the new attribute automatically
        dies_ok { $obj->bar( 'xxx' ) };
    
        # Cannot define a new method on the fly
        dies_ok { $obj->baz( qmeth { ... }) };

    In order to add methods/accessors you need to create a control object.

 CONTROL OBJECTS

    Control objects are objects that let you interface a mocked object.
    They let you add attributes and methods, or even clear them. This is
    unnecessary unless you use strict mocking, or choose not to import
    qmeth() and qclear().

    Take Control

          my $control = qcontrol( $obj );

    Add Attributes

          $control->set_attributes(
              foo => 'bar',
              ...
          );

    Add Methods

          $control->set_methods(
              do_it => sub { ... }, # No need to use qmeth()
              ...
          );

    Clear Attributes/Methods

          $control->clear( qw/foo do_it .../ );

    Toggle strict

          $control->strict( $BOOL );

    Create With Control

          my $obj = qobj ...;
          my $obj = qstrict ...;
          my ( $obj,  $control  ) = qobjc ...;
          my ( $sobj, $scontrol ) = qstrictc ...;

 MOCKING CLASSES

    Note: the control object returned here is of type Mock::Quick::Class,
    whereas control objects for qobj style objects are of
    Mock::Quick::Object::Control.

  IMPLEMENT A CLASS

    This will implement a class at the namespace provided via the
    -implement argument. The class must not already be loaded. Once
    complete the real class will be prevented from loading until you call
    undefine() on the control object.

        use Mock::Quick;
    
        my $control = qclass(
            -implement => 'My::Package',
    
            # Insert a generic new() method (blessed hash)
            -with_new => 1,
    
            # Inheritance
            -subclass => 'Some::Class',
            # Can also do
            -subclass => [ 'Class::A', 'Class::B' ],
    
            # generic get/set attribute methods.
            -attributes => [ qw/a b c d/ ],
    
            # Method that simply returns a value.
            simple => 'value',
    
            # Custom method.
            method => sub { ... },
        );
    
        my $obj = $control->package->new;
        # OR
        my $obj = My::Package->new;
    
        # Override a method
        $control->override( foo => sub { ... });
    
        # Restore it to the original
        $control->restore( 'foo' );
    
        # Remove the namespace we created, which would allow the real thing to load
        # in a require or use statement.
        $control->undefine();

    You can also use the qimplement() method instead of qclass:

        use Mock::Quick;
    
        my $control = qimplement 'Some::Package' => ( %args );

  ANONYMOUS MOCKED CLASS

    This is if you just need to generate a class where the package name
    does not matter. This is done when the -takeover and -implement
    arguments are both omitted.

        use Mock::Quick;
    
        my $control = qclass(
            # Insert a generic new() method (blessed hash)
            -with_new => 1,
    
            # Inheritance
            -subclass => 'Some::Class',
            # Can also do
            -subclass => [ 'Class::A', 'Class::B' ],
    
            # generic get/set attribute methods.
            -attributes => [ qw/a b c d/ ],
    
            # Method that simply returns a value.
            simple => 'value',
    
            # Custom method.
            method => sub { ... },
        );
    
        my $obj = $control->package->new;
    
        # Override a method
        $control->override( foo => sub { ... });
    
        # Restore it to the original
        $control->restore( 'foo' );
    
        # Remove the anonymous namespace we created.
        $control->undefine();

  TAKING OVER EXISTING/LOADED CLASSES

        use Mock::Quick;
    
        my $control = qtakeover 'Some::Package' => ( %overrides );
    
        # Override a method
        $control->override( foo => sub { ... });
    
        # Restore it to the original
        $control->restore( 'foo' );
    
        # Destroy the control object and completely restore the original class
        # Some::Package.
        $control = undef;

    You can also do this through qclass():

        use Mock::Quick;
    
        my $control = qclass(
            -takeover => 'Some::Package',
            %overrides
        );

METRICS

    All control objects have a 'metrics' method. The metrics method returns
    a hash where keys are method names, and values are the number of times
    the method has been called. When a method is altered or removed the key
    is deleted.

    Metrics only apply to mocked methods. When you takeover an already
    loaded class metrics will only track overridden methods.

EXPORTS

    Mock-Quick uses Exporter::Declare. This allows for exports to be
    prefixed or renamed. See "RENAMING IMPORTED ITEMS" in Exporter::Declare
    for more information.

    $obj = qobj( attribute => value, ... )

    ( $obj, $control ) = qobjc( attribute => value, ... )

      Create an object. Every possible attribute works fine as a get/set
      accessor. You can define other methods using qmeth {...} and
      assigning that to an attribute. You can clear a method using qclear()
      as an argument.

      See Mock::Quick::Object for more.

    $obj = qstrict( attribute => value, ... )

    ( $obj, $control ) = qstrictc( attribute => value, ... )

      Create a stricter object, get/set accessors will not autovivify into
      existence for undefined attributes.

    $control = qclass( -config => ..., name => $value || sub { ... }, ... )

      Define an anonymous package with the desired methods and
      specifications.

      See Mock::Quick::Class for more.

    $control = qclass( -takeover => $package, %overrides )

    $control = qtakeover( $package, %overrides );

      Take over an existing class.

      See Mock::Quick::Class for more.

    $control = qimplement( $package, -config => ..., name => $value || sub
    { ... }, ... )

    $control = qclass( -implement => $package, ... )

      Implement the given package to specifications, altering %INC so that
      the real class will not load. Destroying the control object will once
      again allow the original to load.

    qclear()

      Returns a special reference that when used as an argument, will cause
      Mock::Quick::Object methods to be cleared.

    qmeth { my $self = shift; ... }

      Define a method for an Mock::Quick::Object instance.

      default_export qcontrol => sub { Mock::Quick::Object::Control->new(
      @_ ) };

AUTHORS

    Chad Granum exodist7@gmail.com

    Ben Hengst notbenh@cpan.org

CONTRIBUTORS

    Contributors are listed as authors in modules they have touched.

    Ben Hengst notbenh@cpan.org

    Glen Hinkle glen@empireenterprises.com

COPYRIGHT

    Copyright (C) 2011 Chad Granum

    Mock-Quick is free software; Standard perl licence.

    Mock-Quick is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the license
    for more details.