ENSCORESW-2827: minimal test on xref config validity

modules/t/xrefs.t

+# Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
+# Copyright [2016-2018] EMBL-European Bioinformatics Institute
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# 
+#      http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+use strict;
+use warnings;
+
+use Cwd;
+use File::Spec;
+use File::Basename qw/dirname/;
+use File::Temp;
+use Test::More;
+use Test::Warnings;
+
+#chdir into the file's target & request cwd() which should be fully resolved now.
+#then go back
+my $file_dir = dirname(__FILE__);
+my $original_dir = cwd();
+chdir($file_dir);
+my $cur_dir = cwd();
+chdir($original_dir);
+my $root = File::Spec->catdir($cur_dir, File::Spec->updir(),File::Spec->updir());
+
+my $script = File::Spec->catfile($root, "misc-scripts/xref_mapping/xref_config2sql.pl");
+my $config = File::Spec->catfile($root, "misc-scripts/xref_mapping/xref_config.ini");
+
+my $tmpdir = File::Temp->newdir();
+my $dirname = $tmpdir->dirname;
+my $tmpfile = File::Temp->new(DIR => $dirname, SUFFIX => ".txt");
+my $cmd = "perl $script $config > $tmpfile";
+system($cmd);
+
+my $content = do { local(@ARGV, $/) = $tmpfile; <> };
+
+# Test the file was written in entirety
+like($content, qr/FINISHED SUCCESSFULLY/, "Config was parsed successfully");
+
+
+done_testing();