NAME

       SQL::Abstract::Test - Helper function for testing SQL::Abstract

SYNOPSIS

         use SQL::Abstract;
         use Test::More;
         use SQL::Abstract::Test import => [qw/
           is_same_sql_bind is_same_sql is_same_bind
           eq_sql_bind eq_sql eq_bind
         /];

         my ($sql, @bind) = SQL::Abstract->new->select(%args);

         is_same_sql_bind($given_sql,    \@given_bind,
                          $expected_sql, \@expected_bind, $test_msg);

         is_same_sql($given_sql, $expected_sql, $test_msg);
         is_same_bind(\@given_bind, \@expected_bind, $test_msg);

         my $is_same = eq_sql_bind($given_sql,    \@given_bind,
                                   $expected_sql, \@expected_bind);

         my $sql_same = eq_sql($given_sql, $expected_sql);
         my $bind_same = eq_bind(\@given_bind, \@expected_bind);

DESCRIPTION

       This module is only intended for authors of tests on SQL::Abstract and related modules; it
       exports functions for comparing two SQL statements and their bound values.

       The SQL comparison is performed on abstract syntax, ignoring differences in spaces or in
       levels of parentheses.  Therefore the tests will pass as long as the semantics is
       preserved, even if the surface syntax has changed.

       Disclaimer : the semantic equivalence handling is pretty limited.  A lot of effort goes
       into distinguishing significant from non-significant parenthesis, including AND/OR
       operator associativity.  Currently this module does not support commutativity and more
       intelligent transformations like De Morgan's laws
        <http://en.wikipedia.org/wiki/De_Morgan's_laws>, etc.

       For a good overview of what this test framework is currently capable of refer to
       "t/10test.t"

FUNCTIONS

   is_same_sql_bind
         is_same_sql_bind(
           $given_sql, \@given_bind,
           $expected_sql, \@expected_bind,
           $test_msg
         );

         is_same_sql_bind(
           \[$given_sql, @given_bind],
           \[$expected_sql, @expected_bind],
           $test_msg
         );

         is_same_sql_bind(
           $dbic_rs->as_query
           $expected_sql, \@expected_bind,
           $test_msg
         );

       Compares given and expected pairs of "($sql, \@bind)" by unpacking @_ as shown in the
       examples above and passing the arguments to "eq_sql" and "eq_bind". Calls "ok" in
       Test::Builder with the combined result, with $test_msg as message.  If the test fails, a
       detailed diagnostic is printed.

   is_same_sql
         is_same_sql(
           $given_sql,
           $expected_sql,
           $test_msg
         );

       Compares given and expected SQL statements via "eq_sql", and calls "ok" in Test::Builder
       on the result, with $test_msg as message.  If the test fails, a detailed diagnostic is
       printed.

   is_same_bind
         is_same_bind(
           \@given_bind,
           \@expected_bind,
           $test_msg
         );

       Compares given and expected bind values via "eq_bind", and calls "ok" in Test::Builder on
       the result, with $test_msg as message.  If the test fails, a detailed diagnostic is
       printed.

   eq_sql_bind
         my $is_same = eq_sql_bind(
           $given_sql, \@given_bind,
           $expected_sql, \@expected_bind,
         );

         my $is_same = eq_sql_bind(
           \[$given_sql, @given_bind],
           \[$expected_sql, @expected_bind],
         );

         my $is_same = eq_sql_bind(
           $dbic_rs->as_query
           $expected_sql, \@expected_bind,
         );

       Unpacks @_ depending on the given arguments and calls "eq_sql" and "eq_bind", returning
       their combined result.

   eq_sql
         my $is_same = eq_sql($given_sql, $expected_sql);

       Compares the abstract syntax of two SQL statements. Similar to "is_same_sql", but it just
       returns a boolean value and does not print diagnostics or talk to Test::Builder. If the
       result is false, the global variable "$sql_differ" will contain the SQL portion where a
       difference was encountered; this is useful for printing diagnostics.

   eq_bind
         my $is_same = eq_sql(\@given_bind, \@expected_bind);

       Compares two lists of bind values, taking into account the fact that some of the values
       may be arrayrefs (see "bindtype" in SQL::Abstract). Similar to "is_same_bind", but it just
       returns a boolean value and does not print diagnostics or talk to Test::Builder.

GLOBAL VARIABLES

   $case_sensitive
       If true, SQL comparisons will be case-sensitive. Default is false;

   $parenthesis_significant
       If true, SQL comparison will preserve and report difference in nested parenthesis. Useful
       while testing "IN (( x ))" vs "IN ( x )".  Defaults to false;

   $order_by_asc_significant
       If true SQL comparison will consider "ORDER BY foo ASC" and "ORDER BY foo" to be
       different. Default is false;

   $sql_differ
       When "eq_sql" returns false, the global variable $sql_differ contains the SQL portion
       where a difference was encountered.

SEE ALSO

       SQL::Abstract, Test::More, Test::Builder.

AUTHORS

       Laurent Dami <laurent.dami AT etat  geneve  ch>

       Norbert Buchmuller <norbi@nix.hu>

       Peter Rabbitson <ribasushi@cpan.org>

COPYRIGHT AND LICENSE

       Copyright 2008 by Laurent Dami.

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.