/ 
App-SimpleScan-0.14
River stage one • 6 direct dependents • 6 total dependents
/ simple_scan

NAME

simple_scan - scan a set of Web pages for strings present/absent

ABSTRACT

App::SimpleScan - Mini-language for website testing

SYNOPSIS

simple_scan [--generate] [--run] {file file file ...}

USAGE

# Run the tests in the files supplied on the command line.
# --run (or -run; we're flexible) is assumed if you give no switches.
% simple_scan file1 file2 file3

# Generate a set of tests and save them, then run them.
% <complex pipe> | simple_scan --generate > pipe_scan.t

# Run one simple test
% echo "http://yahoo.com yahoo Y Look for yahoo.com"  | simple_scan -run

DESCRIPTION

simple_scan reads either files supplied on the command line, or standard input. It creates and runs, or prints, or even both, a Test::WWW::Simple test for the criteria supplied to it.

simple_scan's input should be in the following format:

<URL> <pattern> <Y|N> <comment>

The URL is any URL; pattern is a Perl regular expression, delimited by slashes; Y|N is Y if the pattern should match, or N if the pattern should not match; and comment is any arbitrary text you like (as long as it's all on the same line as everything else).

simple_scanwill do its best to try to interpret your pattern; if it can't parse it as a regular expression, it will assume you meant to match against a literal character string instead; so a pattern like

/<b>this</b>/

Would be interpreted as the literal string "<b>this</b>".

COMMAND-LINE SWITCHES

We use Getopt::Long to get the command-line options, so we're really very flexible as to how they're entered. You can use either one dash (as in -foo) or two (as in --bar). You only need to enter the minimum number or characters to match a given switch.

--run

--run tells simple_scan to immediately run the tests it's created. Can be abbreviated to -r.

This option is mosst useful for one-shot tests that you're not planning to run repeatedly.

--generate

--generate tells simple_scan to print the test it's generated on the standard output.

This option is useful to build up a test suite to be reused later.

Both -r and -g can be specified at the same time to run a test and print it simultaneously; this is useful when you want to save a test to be run later as well as right now without having to regenerate the test.

--define

--define allows you to predefine substitutions to be used during a simple_scan run. To define a substitution, use this syntax:

--define foo=bar --define baz="one two three"

The first example defines a single substitution; the second defines a multiple substitution. In conjunction with --override, --define can make simple_scan ignore any definitions for variables in the simple_scan input file. Conversely, if --defer is specified, any definitions on the command line will be altered if a definition for the variable is found in the input file.

Note that %%forget can still make simple_scan forget a definition (if App::SimpleScan::Plugin::Forget is installed).

Also note that you define a variable with multiple values like this:

--define foo="bar baz quux"

butnot like this:

--define foo=bar --define foo=baz --define foo=quux

since multiple definitions of a single substitution use only the last substitution defined; the example directly above (with the three "--define" entries) defines "foo" as "quux" and only as "quux".

--override

Makes any definitions entered on the command line override definitions found in the input file.

--defer

Makes any definitions entered on the command line defer to defintions found in the input file - the variables in question will be redefined by the command file.

--debug

Enables debugging for you simple_scan input file; this outputs a lot of extra code which, when executed by simple_scan --run, shows a lot more information as to what actually happened.

Currently, the only extra debugging information is a list of variables which were not altered by substitution pragmas when --override was specified on the command line.

--autocache

Turns on caching immediately, whether or not the input file specifies %%cache or not. Note that a %%nocache in the input file will turn caching off again.

PRAGMAS

Pragmas are ways to influence what simple_scan does when generating tests. They don't output anything themselves.

Pragmas are specified with %% in column 1 and the pragma name immediately following. Any arguments aer supplied after a colon, like this:

%%foo: bar baz

This invokes the foo pragma with the argument bar baz.

Substitutions

Any pragma that's otherwise unrecognized by simple_scan is treated as a substitution. Substitutions assume that you have a name and a set of strings following it; these strings wil be substituted into the test specs occuring between this (set) of substitutions and the next (set).

Here's an example.

%% user dconway chromatic petdance
%% use_perl_id Ovid pemungkah
http://search.cpan.org/~<user>
http://use.perl.org/~<use_perl_id>/journal/
http://search.yahoo.com/
...

This would fetch the CPAN index page for the users dconway, chromatic, and petdance, and the use.perl journals for users Ovid and pemungkah. Finally, it would (just once) fetch the Yahoo! search page - because there are no substitutions in that line, it would only be evaluated once.

The substitutions can occur anywhere in the line, including in the comment.

This pragma allows for very simple-minded internationalization. For instance, let's assume that you want to substitute each of a list of two-character country codes into a string (most likely somewhere in the URL, but possibly in the comment too).

simple_scan will do this for you, creating a test for each country code you specify. For instance:

%%xx: es au my jp
http://>xx<.mysite.com/     /blargh/  Y  look for blargh (>xx<)

This would generate 4 tests, for es.mysite.com, au.mysite.com, c<my.mysite.com>, and jp.mysite.com, all looking to match blargh somewhere on the page.

agent

The agent pragma allows you to switch user agents during the test. Test::WWW::Simple's default is Windows IE 6, but you can switch it to any of the other user agents supported by WWW::Mechanize.

http://gemal.dk/browserspy/basic.html /Explorer/ Y Should be Explorer
%%agent: Mac Safari
http://gemal.dk/browserspy/basic.html /Safari/ Y Should be Safari

cache

The cache pragma turns on URL caching; once enabled, the page returned on the first access to a URL is returned directly from a memory cache, without its being reaccessed from the Web.

Using cache can result in major speedups for tests which repeatedly hit the same page.

nocache

The nocache pragma turns off URL caching; this is useful if you have something like a REST interface that may return different values from repeated accesses to the same URL.

AUTHOR

Joe McMahon <mcmahon@cpan.org>

COPYRIGHT AND LICENSE

Copyright (c) 2005 by Yahoo!

This script is free software; you can redistribute it or modify it under the same terms as Perl itself, either Perl version 5.6.1 or, at your option, any later version of Perl 5 you may have available.