Don't report negative line numbers through get_line_data

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/coveragetest.py b/tests/coveragetest.py
index cf3d2474..0e80f4a9 100644
--- a/tests/coveragetest.py
+++ b/tests/coveragetest.py
@@ -166,6 +166,8 @@ class CoverageTest(
         `arcs_unpredicted` are the arcs executed in the code, but not deducible
         from the code.
 
+        Returns the Coverage object, in case you want to poke at it some more.
+
         """
         # We write the code into a file so that we can import it.
         # Coverage wants to deal with things as modules with file names.
@@ -248,6 +250,8 @@ class CoverageTest(
             rep = " ".join(frep.getvalue().split("\n")[2].split()[1:])
             self.assertEqual(report, rep)
 
+        return cov
+
     def nice_file(self, *fparts):
         """Canonicalize the filename composed of the parts in `fparts`."""
         fname = os.path.join(*fparts)