SQL::Abstract::Test(3) 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.

AUTHORS

Laurent Dami <laurent.dami AT etat geneve ch>

Norbert Buchmuller <[email protected]>

Peter Rabbitson <[email protected]>

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.

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