Test2::Tools::Mock - Class/Instance mocking for Test2.
Mocking is often an essential part of testing. This library covers
some of the most common mocking needs. This plugin is heavily influenced by
Mock::Quick, but with an improved API. This plugin is also intended to play
well with other plugins in ways Mock::Quick would be unable to.
my $mock = mock 'Some::Class' => (
track => $BOOL, # Enable/Disable tracking on subs defined below
add => [
new_method => sub { ... },
],
override => [
replace_method => sub { ... },
],
set => [
replace_or_inject => sub { ... },
],
track => $bool, # enable/disable tracking again to affect mocks made after this point
..., # Argument keys may be repeated
);
Some::Class->new_method(); # Calls the newly injected method
Some::Class->replace_method(); # Calls our replacement method.
$mock->override(...) # Override some more
$mock = undef; # Undoes all the mocking, restoring all original methods.
my $simple_mock = mock {} => (
add => [
is_active => sub { ... }
]
);
$simple_mock->is_active(); # Calls our newly mocked method.
- mock
- This is a one-stop shop function that delegates to one of the other
methods depending on how it is used. If you are not comfortable with a
function that has a lot of potential behaviors, you can use one of the
other functions directly.
- @mocks = mocked($object)
- @mocks = mocked($class)
- Check if an object or class is mocked. If it is mocked the
$mock object(s) (Test2::Mock) will be
returned.
- $mock = mock $class => ( ... );
- $mock = mock $instance => ( ... )
- $mock = mock 'class', $class => ( ... )
- These forms delegate to mock_class() to mock a
package. The third form is to be explicit about what type of mocking you
want.
- $obj = mock()
- $obj = mock { ... }
- $obj = mock 'obj', ...;
- These forms delegate to mock_obj() to create
instances of anonymous packages where methods are vivified into existence
as needed.
- mock $mock => sub { ... }
- mock $method => ( ... )
- These forms go together, the first form will set
$mock as the current mock build, then run the sub.
Within the sub you can declare mock specifications using the second form.
The first form delegates to mock_build().
The second form calls the specified method on the current
build. This second form delegates to
mock_do().
DEFINING MOCKS
- $obj = mock_obj( ... )
- $obj = mock_obj { ... } => ( ... )
- $obj = mock_obj sub { ... }
- $obj = mock_obj { ... } => sub { ... }
- This method lets you quickly generate a blessed object. The object will be
an instance of a randomly generated package name. Methods will vivify as
read/write accessors as needed.
Arguments can be any method available to Test2::Mock followed
by an argument. If the very first argument is a hashref then it will be
blessed as your new object.
If you provide a coderef instead of key/value pairs, the
coderef will be run to build the mock. (See the "BUILDING
MOCKS" section).
- $mock = mock_class $class => ( ... )
- $mock = mock_class $instance => ( ... )
- $mock = mock_class ... => sub { ... }
- This will create a new instance of Test2::Mock to control the package
specified. If you give it a blessed reference it will use the class of the
instance.
Arguments can be any method available to Test2::Mock followed
by an argument. If the very first argument is a hashref then it will be
blessed as your new object.
If you provide a coderef instead of key/value pairs, the
coderef will be run to build the mock. (See the "BUILDING
MOCKS" section).
BUILDING MOCKS
- mock_build $mock
=> sub { ... }
- Set $mock as the current build, then run the
specified code. $mock will no longer be the
current build when the sub is complete.
- $mock = mock_building()
- Get the current building $mock object.
- mock_do $method =>
$args
- Run the specified method on the currently building object.
METHOD GENERATORS
- $sub = mock_accessor $field
- Generate a read/write accessor for the specified field. This will generate
a sub like the following:
$sub = sub {
my $self = shift;
($self->{$field}) = @_ if @_;
return $self->{$field};
};
- $sub = mock_getter $field
- Generate a read only accessor for the specified field. This will generate
a sub like the following:
$sub = sub {
my $self = shift;
return $self->{$field};
};
- $sub = mock_setter $field
- Generate a write accessor for the specified field. This will generate a
sub like the following:
$sub = sub {
my $self = shift;
($self->{$field}) = @_;
};
- %pairs = mock_accessors(qw/name1 name2 name3/)
- Generates several read/write accessors at once, returns key/value pairs
where the key is the field name, and the value is the coderef.
- %pairs = mock_getters(qw/name1 name2 name3/)
- Generates several read only accessors at once, returns key/value pairs
where the key is the field name, and the value is the coderef.
- %pairs = mock_setters(qw/name1 name2 name3/)
- Generates several write accessors at once, returns key/value pairs where
the key is the field name, and the value is the coderef.
my $mock = mock(...);
Mock objects are instances of Test2::Mock. See it for their
methods.
The source code repository for Test2-Suite can be found at
<https://github.com/Test-More/Test2-Suite/>.
Copyright 2018 Chad Granum <exodist@cpan.org>.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
See <https://dev.perl.org/licenses/>