Acme-Devel-Hide-Tiny

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META.json  view on Meta::CPAN

         "type" : "git",
         "url" : "https://github.com/dagolden/Acme-Devel-Hide-Tiny.git",
         "web" : "https://github.com/dagolden/Acme-Devel-Hide-Tiny"
      }
   },
   "version" : "0.002",
   "x_authority" : "cpan:DAGOLDEN",
   "x_contributors" : [
      "Graham Knop <haarg@haarg.org>"
   ],
   "x_serialization_backend" : "Cpanel::JSON::XS version 3.0225"
}

README  view on Meta::CPAN

NAME
    Acme::Devel::Hide::Tiny - Hide a perl module for testing, in one
    statement

VERSION
    version 0.002

SYNOPSIS
        # in 'foo.t', assume we want to hide Cpanel::JSON::XS

        # hide Cpanel::JSON::XS -> Cpanel/JSON/XS.pm
        use lib map {
            my $m = $_;
            sub { return unless $_[1] eq $m; die "Can't locate $_[1] in \@INC (hidden)\n"; }
        } qw{Cpanel/JSON/XS.pm};

DESCRIPTION
    The Devel::Hide and Test::Without::Module modules are very helpful
    development tools. Unfortunately, using them in your .t files adds a
    test dependency. Maybe you don't want to do that.

    Instead, you can use the one-liner from the SYNOPSIS above, which is an
    extremely stripped down version of Devel::Hide.

    Here is a more verbose, commented version of it:

README  view on Meta::CPAN

                    # return if not the path to hide; perl checks rest of @INC
                    return unless $_[1] eq $m;

                    # die with the error message we want
                    die "Can't locate $_[1] in \@INC (hidden)\n";
                }
            }

            # input to map is a list module names, converted to paths;
            qw{Cpanel/JSON/XS.pm JSON/XS.pm}

        ; # end of 'use lib' statement

    When perl sees a coderef in @INC, it gives the coderef a chance to
    provide the source code of that module. In this case, if the path is the
    one we want to hide, it dies with the message we want and perl won't
    continue looking at @INC to find the real module source. The module is
    hidden and dies with a message similar to the one that would happen if
    it weren't installed.

lib/Acme/Devel/Hide/Tiny.pm  view on Meta::CPAN

=head1 NAME

Acme::Devel::Hide::Tiny - Hide a perl module for testing, in one statement

=head1 VERSION

version 0.002

=head1 SYNOPSIS

    # in 'foo.t', assume we want to hide Cpanel::JSON::XS

    # hide Cpanel::JSON::XS -> Cpanel/JSON/XS.pm
    use lib map {
        my $m = $_;
        sub { return unless $_[1] eq $m; die "Can't locate $_[1] in \@INC (hidden)\n"; }
    } qw{Cpanel/JSON/XS.pm};

=head1 DESCRIPTION

The L<Devel::Hide> and L<Test::Without::Module> modules are very helpful
development tools.  Unfortunately, using them in your F<.t> files adds a
test dependency.  Maybe you don't want to do that.

Instead, you can use the one-liner from the SYNOPSIS above, which is an
extremely stripped down version of L<Devel::Hide>.

lib/Acme/Devel/Hide/Tiny.pm  view on Meta::CPAN

                # return if not the path to hide; perl checks rest of @INC
                return unless $_[1] eq $m;

                # die with the error message we want
                die "Can't locate $_[1] in \@INC (hidden)\n";
            }
        }

        # input to map is a list module names, converted to paths;
        qw{Cpanel/JSON/XS.pm JSON/XS.pm}

    ; # end of 'use lib' statement

When perl sees a coderef in C<@INC>, it gives the coderef a chance to
provide the source code of that module.  In this case, if the path is the
one we want to hide, it dies with the message we want and perl won't
continue looking at C<@INC> to find the real module source.  The module is
hidden and dies with a message similar to the one that would happen if it
weren't installed.