Add test for summary-on-multiple-lines (#454).

rpmlint/checks/TagsCheck.py

@@ -178,7 +178,7 @@ class TagsCheck(AbstractCheck):
             typos = self.spellchecker.spell_check(summary, 'Summary({})', lang, pkgname, ignored_words)
             for typo in typos.items():
                 self.output.add_info('E', pkg, 'spelling-error', typo)
-        if '\n' in summary:
+        if any(nl in summary for nl in ('\n', '\r')):
             self.output.add_info('E', pkg, 'summary-on-multiple-lines', lang)
         if (summary[0] != summary[0].upper() and
                 summary.partition(' ')[0] not in CAPITALIZED_IGNORE_LIST):

test/test_tags.py

@@ -386,3 +386,12 @@ def test_package_dev_dependency(tmpdir, package, tagscheck):
     assert 'E: devel-dependency glibc-devel' in out
     # Test if a package does not have a Group tag
     assert 'W: non-standard-group Devel/Something' not in out
+
+
+@pytest.mark.parametrize('package', ['binary/summary-on-multiple-lines'])
+def test_summary_on_multiple_lines(tmpdir, package, tagscheck):
+    # Test if a package has summary on multiple lines.
+    output, test = tagscheck
+    test.check(get_tested_package(package, tmpdir))
+    out = output.print_results(output.results)
+    assert 'E: summary-on-multiple-lines' in out