add another roundtrip test

diff --git a/t/62roundtrip_datacheck.t b/t/62roundtrip_datacheck.t
new file mode 100644 (file)
index 0000000..ffcb9da
--- /dev/null
+++ b/t/62roundtrip_datacheck.t
@@ -0,0 +1,41 @@
+use warnings;
+use strict;
+use Test::SQL::Translator;
+use Test::Differences;
+use FindBin qw/$Bin/;
+
+BEGIN {
+    maybe_plan(1, 'SQL::Translator::Parser::XML',
+                  'SQL::Translator::Producer::XML');
+}
+
+# It's very hard to read and modify YAML by hand. Thus we
+# use an XML file for definitions, and generate a YAML from
+# it in Makefile.PL, so we do not saddle the user with XML
+# dependencies for testing. This test makes sure they do
+# not drift apart.
+
+use SQL::Translator;
+
+my $base_xml_fn = "$Bin/data/roundtrip.xml";
+my $autogen_yaml_fn = "$Bin/data/roundtrip_autogen.yaml";
+
+my $orig_xml = _parse_to_xml ($base_xml_fn, 'XML');
+my $new_xml = _parse_to_xml ($autogen_yaml_fn, 'YAML');
+
+eq_or_diff ("$new_xml", "$orig_xml", 'YAML test schema matches original XML schema');
+
+sub _parse_to_xml {
+  my ($fn, $type) = @_;
+
+  my $tr = SQL::Translator->new;
+  $tr->no_comments (1); # this will drop the XML header
+
+  my $xml = $tr->translate (
+    parser => $type,
+    file => $fn,
+    producer => 'XML',
+  ) or die $tr->error;
+
+  return $xml;
+}