-package SQL::Abstract::Test; # see doc at end of file\r
-\r
-use strict;\r
-use warnings;\r
-use Test::More;\r
-use base 'Exporter';\r
-use Data::Dumper;\r
-use Carp;\r
-\r
-our @EXPORT_OK = qw/&is_same_sql_bind &eq_sql &eq_bind \r
- $case_sensitive $sql_differ/;\r
-\r
-our $case_sensitive = 0;\r
-our $sql_differ; # keeps track of differing portion between SQLs\r
-\r
-sub is_same_sql_bind {\r
- my ($sql1, $bind_ref1, $sql2, $bind_ref2, $msg) = @_;\r
-\r
- # compare\r
- my $tree1 = parse($sql1);\r
- my $tree2 = parse($sql2);\r
- my $same_sql = eq_sql($tree1, $tree2);\r
- my $same_bind = eq_bind($bind_ref1, $bind_ref2);\r
-\r
- # call Test::More::ok\r
- ok($same_sql && $same_bind, $msg);\r
-\r
- # add debugging info\r
- if (!$same_sql) {\r
- diag "SQL expressions differ\n"\r
- ." got: $sql1\n"\r
- ."expected: $sql2\n"\r
- ."differing in :\n$sql_differ\n";\r
- ;\r
- }\r
- if (!$same_bind) {\r
- diag "BIND values differ\n"\r
- ." got: " . Dumper($bind_ref1)\r
- ."expected: " . Dumper($bind_ref2)\r
- ;\r
- }\r
-}\r
-\r
-\r
-sub eq_bind {\r
- my ($bind_ref1, $bind_ref2) = @_;\r
- return stringify_bind($bind_ref1) eq stringify_bind($bind_ref2);\r
-}\r
-\r
-sub stringify_bind {\r
- my $bind_ref = shift || [];\r
-\r
- # some bind values can be arrayrefs (see L<SQL::Abstract/bindtype>),\r
- # so stringify them.\r
- my @strings = map {ref $_ ? join('=>', @$_) : ($_ || '')} @$bind_ref;\r
-\r
- # join all values into a single string\r
- return join "///", @strings;\r
-}\r
-\r
-sub eq_sql {\r
- my ($left, $right) = @_;\r
-\r
- # ignore top-level parentheses \r
- while ($left->[0] eq 'PAREN') {$left = $left->[1] }\r
- while ($right->[0] eq 'PAREN') {$right = $right->[1]}\r
-\r
- # if operators are different\r
- if ($left->[0] ne $right->[0]) { \r
- $sql_differ = sprintf "OP [$left->[0]] != [$right->[0]] in\nleft: %s\nright: %s\n",\r
- unparse($left),\r
- unparse($right);\r
- return 0;\r
- }\r
- # elsif operators are identical, compare operands\r
- else { \r
- if ($left->[0] eq 'EXPR' ) { # unary operator\r
- (my $l = " $left->[1] " ) =~ s/\s+/ /g;\r
- (my $r = " $right->[1] ") =~ s/\s+/ /g;\r
- my $eq = $case_sensitive ? $l eq $r : uc($l) eq uc($r);\r
- $sql_differ = "[$left->[1]] != [$right->[1]]\n" if not $eq;\r
- return $eq;\r
- }\r
- else { # binary operator\r
- return eq_sql($left->[1][0], $right->[1][0]) # left operand\r
- && eq_sql($left->[1][1], $right->[1][1]); # right operand\r
- }\r
- }\r
-}\r
-\r
-\r
-sub parse {\r
- my $s = shift;\r
-\r
- # tokenize string\r
- my $tokens = [grep {!/^\s*$/} split /\s*(\(|\)|\bAND\b|\bOR\b)\s*/, $s];\r
-\r
- my $tree = _recurse_parse($tokens);\r
- return $tree;\r
-}\r
-\r
-sub _recurse_parse {\r
- my $tokens = shift;\r
-\r
- my $left;\r
- while (1) { # left-associative parsing\r
-\r
- my $lookahead = $tokens->[0];\r
- return $left if !defined($lookahead) || $lookahead eq ')';\r
-\r
- my $token = shift @$tokens;\r
-\r
- # nested expression in ()\r
- if ($token eq '(') {\r
- my $right = _recurse_parse($tokens);\r
- $token = shift @$tokens or croak "missing ')'";\r
- $token eq ')' or croak "unexpected token : $token";\r
- $left = $left ? [CONCAT => [$left, [PAREN => $right]]]\r
- : [PAREN => $right];\r
- }\r
- # AND/OR\r
- elsif ($token eq 'AND' || $token eq 'OR') {\r
- my $right = _recurse_parse($tokens);\r
- $left = [$token => [$left, $right]];\r
- }\r
- # leaf expression\r
- else {\r
- $left = $left ? [CONCAT => [$left, [EXPR => $token]]]\r
- : [EXPR => $token];\r
- }\r
- }\r
-}\r
-\r
-\r
-\r
-sub unparse {\r
- my $tree = shift;\r
- my $dispatch = {\r
- EXPR => sub {$tree->[1] },\r
- PAREN => sub {"(" . unparse($tree->[1]) . ")" },\r
- CONCAT => sub {join " ", map {unparse($_)} @{$tree->[1]}},\r
- AND => sub {join " AND ", map {unparse($_)} @{$tree->[1]}},\r
- OR => sub {join " OR ", map {unparse($_)} @{$tree->[1]}},\r
- };\r
- $dispatch->{$tree->[0]}->();\r
-}\r
-\r
-\r
-1;\r
-\r
-\r
-__END__\r
-\r
-=head1 NAME\r
-\r
-SQL::Abstract::Test - Helper function for testing SQL::Abstract\r
-\r
-=head1 SYNOPSIS\r
-\r
- use SQL::Abstract;\r
- use Test::More;\r
- use SQL::Abstract::Test qw/is_same_sql_bind/;\r
- \r
- my ($sql, @bind) = SQL::Abstract->new->select(%args);\r
- is_same_sql_bind($given_sql, \@given_bind, \r
- $expected_sql, \@expected_bind, $test_msg);\r
-\r
-=head1 DESCRIPTION\r
-\r
-This module is only intended for authors of tests on\r
-L<SQL::Abstract|SQL::Abstract> and related modules;\r
-it exports functions for comparing two SQL statements\r
-and their bound values.\r
-\r
-The SQL comparison is performed on I<abstract syntax>,\r
-ignoring differences in spaces or in levels of parentheses.\r
-Therefore the tests will pass as long as the semantics\r
-is preserved, even if the surface syntax has changed.\r
-\r
-B<Disclaimer> : this is only a half-cooked semantic equivalence;\r
-parsing is simple-minded, and comparison of SQL abstract syntax trees\r
-ignores commutativity or associativity of AND/OR operators, Morgan\r
-laws, etc.\r
-\r
-=head1 FUNCTIONS\r
-\r
-=head2 is_same_sql_bind\r
-\r
- is_same_sql_bind($given_sql, \@given_bind, \r
- $expected_sql, \@expected_bind, $test_msg);\r
-\r
-Compares given and expected pairs of C<($sql, \@bind)>, and calls\r
-L<Test::More/ok> on the result, with C<$test_msg> as message. If the\r
-test fails, a detailed diagnostic is printed. For clients which use\r
-L<Test::More|Test::More>, this is the only function that needs to be\r
-imported.\r
-\r
-=head2 eq_sql\r
-\r
- my $is_same = eq_sql($given_sql, $expected_sql);\r
-\r
-Compares the abstract syntax of two SQL statements. If the result is\r
-false, global variable L</sql_differ> will contain the SQL portion\r
-where a difference was encountered; this is useful for printing diagnostics.\r
-\r
-=head2 eq_bind\r
-\r
- my $is_same = eq_sql(\@given_bind, \@expected_bind);\r
-\r
-Compares two lists of bind values, taking into account\r
-the fact that some of the values may be\r
-arrayrefs (see L<SQL::Abstract/bindtype>).\r
-\r
-=head1 GLOBAL VARIABLES\r
-\r
-=head2 case_sensitive\r
-\r
-If true, SQL comparisons will be case-sensitive. Default is false;\r
-\r
-=head2 sql_differ\r
-\r
-When L</eq_sql> returns false, the global variable\r
-C<$sql_differ> contains the SQL portion\r
-where a difference was encountered.\r
-\r
-\r
-=head1 SEE ALSO\r
-\r
-L<SQL::Abstract>, L<Test::More>.\r
-\r
-=head1 AUTHOR\r
-\r
-Laurent Dami, E<lt>laurent.dami AT etat geneve chE<gt>\r
-\r
-=head1 COPYRIGHT AND LICENSE\r
-\r
-Copyright 2008 by Laurent Dami.\r
-\r
-This library is free software; you can redistribute it and/or modify\r
-it under the same terms as Perl itself. \r
+package SQL::Abstract::Test; # see doc at end of file
+
+use strict;
+use warnings;
+use Test::More;
+use base 'Exporter';
+use Data::Dumper;
+use Carp;
+
+our @EXPORT_OK = qw/&is_same_sql_bind &eq_sql &eq_bind
+ $case_sensitive $sql_differ/;
+
+our $case_sensitive = 0;
+our $sql_differ; # keeps track of differing portion between SQLs
+
+sub is_same_sql_bind {
+ my ($sql1, $bind_ref1, $sql2, $bind_ref2, $msg) = @_;
+
+ # compare
+ my $tree1 = parse($sql1);
+ my $tree2 = parse($sql2);
+ my $same_sql = eq_sql($tree1, $tree2);
+ my $same_bind = eq_bind($bind_ref1, $bind_ref2);
+
+ # call Test::More::ok
+ ok($same_sql && $same_bind, $msg);
+
+ # add debugging info
+ if (!$same_sql) {
+ diag "SQL expressions differ\n"
+ ." got: $sql1\n"
+ ."expected: $sql2\n"
+ ."differing in :\n$sql_differ\n";
+ ;
+ }
+ if (!$same_bind) {
+ diag "BIND values differ\n"
+ ." got: " . Dumper($bind_ref1)
+ ."expected: " . Dumper($bind_ref2)
+ ;
+ }
+}
+
+
+sub eq_bind {
+ my ($bind_ref1, $bind_ref2) = @_;
+ return stringify_bind($bind_ref1) eq stringify_bind($bind_ref2);
+}
+
+sub stringify_bind {
+ my $bind_ref = shift || [];
+
+ # some bind values can be arrayrefs (see L<SQL::Abstract/bindtype>),
+ # so stringify them.
+ my @strings = map {ref $_ eq 'ARRAY' ? join('=>', @$_) : ($_ || '')}
+ @$bind_ref;
+
+ # join all values into a single string
+ return join "///", @strings;
+}
+
+sub eq_sql {
+ my ($left, $right) = @_;
+
+ # ignore top-level parentheses
+ while ($left->[0] eq 'PAREN') {$left = $left->[1] }
+ while ($right->[0] eq 'PAREN') {$right = $right->[1]}
+
+ # if operators are different
+ if ($left->[0] ne $right->[0]) {
+ $sql_differ = sprintf "OP [$left->[0]] != [$right->[0]] in\nleft: %s\nright: %s\n",
+ unparse($left),
+ unparse($right);
+ return 0;
+ }
+ # elsif operators are identical, compare operands
+ else {
+ if ($left->[0] eq 'EXPR' ) { # unary operator
+ (my $l = " $left->[1] " ) =~ s/\s+/ /g;
+ (my $r = " $right->[1] ") =~ s/\s+/ /g;
+ my $eq = $case_sensitive ? $l eq $r : uc($l) eq uc($r);
+ $sql_differ = "[$left->[1]] != [$right->[1]]\n" if not $eq;
+ return $eq;
+ }
+ else { # binary operator
+ return eq_sql($left->[1][0], $right->[1][0]) # left operand
+ && eq_sql($left->[1][1], $right->[1][1]); # right operand
+ }
+ }
+}
+
+
+sub parse {
+ my $s = shift;
+
+ # tokenize string
+ my $tokens = [grep {!/^\s*$/} split /\s*(\(|\)|\bAND\b|\bOR\b)\s*/, $s];
+
+ my $tree = _recurse_parse($tokens);
+ return $tree;
+}
+
+sub _recurse_parse {
+ my $tokens = shift;
+
+ my $left;
+ while (1) { # left-associative parsing
+
+ my $lookahead = $tokens->[0];
+ return $left if !defined($lookahead) || $lookahead eq ')';
+
+ my $token = shift @$tokens;
+
+ # nested expression in ()
+ if ($token eq '(') {
+ my $right = _recurse_parse($tokens);
+ $token = shift @$tokens or croak "missing ')'";
+ $token eq ')' or croak "unexpected token : $token";
+ $left = $left ? [CONCAT => [$left, [PAREN => $right]]]
+ : [PAREN => $right];
+ }
+ # AND/OR
+ elsif ($token eq 'AND' || $token eq 'OR') {
+ my $right = _recurse_parse($tokens);
+ $left = [$token => [$left, $right]];
+ }
+ # leaf expression
+ else {
+ $left = $left ? [CONCAT => [$left, [EXPR => $token]]]
+ : [EXPR => $token];
+ }
+ }
+}
+
+
+
+sub unparse {
+ my $tree = shift;
+ my $dispatch = {
+ EXPR => sub {$tree->[1] },
+ PAREN => sub {"(" . unparse($tree->[1]) . ")" },
+ CONCAT => sub {join " ", map {unparse($_)} @{$tree->[1]}},
+ AND => sub {join " AND ", map {unparse($_)} @{$tree->[1]}},
+ OR => sub {join " OR ", map {unparse($_)} @{$tree->[1]}},
+ };
+ $dispatch->{$tree->[0]}->();
+}
+
+
+1;
+
+
+__END__
+
+=head1 NAME
+
+SQL::Abstract::Test - Helper function for testing SQL::Abstract
+
+=head1 SYNOPSIS
+
+ use SQL::Abstract;
+ use Test::More;
+ use SQL::Abstract::Test qw/is_same_sql_bind/;
+
+ my ($sql, @bind) = SQL::Abstract->new->select(%args);
+ is_same_sql_bind($given_sql, \@given_bind,
+ $expected_sql, \@expected_bind, $test_msg);
+
+=head1 DESCRIPTION
+
+This module is only intended for authors of tests on
+L<SQL::Abstract|SQL::Abstract> and related modules;
+it exports functions for comparing two SQL statements
+and their bound values.
+
+The SQL comparison is performed on I<abstract syntax>,
+ignoring differences in spaces or in levels of parentheses.
+Therefore the tests will pass as long as the semantics
+is preserved, even if the surface syntax has changed.
+
+B<Disclaimer> : this is only a half-cooked semantic equivalence;
+parsing is simple-minded, and comparison of SQL abstract syntax trees
+ignores commutativity or associativity of AND/OR operators, Morgan
+laws, etc.
+
+=head1 FUNCTIONS
+
+=head2 is_same_sql_bind
+
+ is_same_sql_bind($given_sql, \@given_bind,
+ $expected_sql, \@expected_bind, $test_msg);
+
+Compares given and expected pairs of C<($sql, \@bind)>, and calls
+L<Test::More/ok> on the result, with C<$test_msg> as message. If the
+test fails, a detailed diagnostic is printed. For clients which use
+L<Test::More|Test::More>, this is the only function that needs to be
+imported.
+
+=head2 eq_sql
+
+ my $is_same = eq_sql($given_sql, $expected_sql);
+
+Compares the abstract syntax of two SQL statements. If the result is
+false, global variable L</sql_differ> will contain the SQL portion
+where a difference was encountered; this is useful for printing diagnostics.
+
+=head2 eq_bind
+
+ my $is_same = eq_sql(\@given_bind, \@expected_bind);
+
+Compares two lists of bind values, taking into account
+the fact that some of the values may be
+arrayrefs (see L<SQL::Abstract/bindtype>).
+
+=head1 GLOBAL VARIABLES
+
+=head2 case_sensitive
+
+If true, SQL comparisons will be case-sensitive. Default is false;
+
+=head2 sql_differ
+
+When L</eq_sql> returns false, the global variable
+C<$sql_differ> contains the SQL portion
+where a difference was encountered.
+
+
+=head1 SEE ALSO
+
+L<SQL::Abstract>, L<Test::More>.
+
+=head1 AUTHOR
+
+Laurent Dami, E<lt>laurent.dami AT etat geneve chE<gt>
+
+=head1 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.
projects / dbsrgits/SQL-Abstract.git / commitdiff