tests/frontend/logging.py: fix error message regex

This regex was not matching, and therefore the assert was not doing
anything.

Fix the regex to match BuildStream's current output.

Add a check to make sure that we get exactly the number of expected
matches. This means we get an obvious error if the regex stops matching
again.

1 files changed, 13 insertions, 2 deletions

diff --git a/tests/frontend/logging.py b/tests/frontend/logging.py
index e7279ac4c..31a2dd909 100644
--- a/tests/frontend/logging.py
+++ b/tests/frontend/logging.py
@@ -109,8 +109,19 @@ def test_failed_build_listing(cli, datafiles):
     result = cli.run(project=project, args=['--on-error=continue', 'build', *element_names])
     result.assert_main_error(ErrorDomain.STREAM, None)
 
+    # Check that we re-print the failure summaries only in the "Failure Summary"
+    # section.
+    # e.g.
+    #
+    # Failure Summary
+    #   testfail-0.bst:
+    #     [00:00:00][44f1b8c3][   build:testfail-0.bst                ] FAILURE Running 'commands'
+    #
     failure_heading_pos = re.search(r'^Failure Summary$', result.stderr, re.MULTILINE).start()
     pipeline_heading_pos = re.search(r'^Pipeline Summary$', result.stderr, re.MULTILINE).start()
     failure_summary_range = range(failure_heading_pos, pipeline_heading_pos)
-    assert all(m.start() in failure_summary_range and m.end() in failure_summary_range
-               for m in re.finditer(r'^\s+testfail-.\.bst.+?\s+Log file', result.stderr, re.MULTILINE))
+    matches = tuple(re.finditer(r'^\s+testfail-.\.bst:$', result.stderr, re.MULTILINE))
+    for m in matches:
+        assert m.start() in failure_summary_range
+        assert m.end() in failure_summary_range
+    assert len(matches) == 3  # each element should be matched once.