docs: final paperwork for exclude_also #1557

Author: nedbat

CHANGES.rst

@@ -20,6 +20,10 @@ development at the same time, such as 4.5.x and 5.0.
 Unreleased
 ----------
 
+- Added a new setting ``[report] exclude_also`` to let you add more exclusions
+  without overwriting the defaults.  Thanks, `Alpha Chen <pull 1557_>`_,
+  closing `issue 1391_`.
+
 - Added a :meth:`.CoverageData.purge_files` method to remove recorded data for
   a particular file.  Contributed by `Stephan Deibel <pull 1547_>`_.
 
@@ -39,11 +43,14 @@ Unreleased
 - Added a ``py.typed`` file to announce our type-hintedness.  Thanks,
   `KotlinIsland <pull 1550_>`_.
 
+.. _issue 1391: https://github.com/nedbat/coveragepy/issues/1391
 .. _issue 1542: https://github.com/nedbat/coveragepy/issues/1542
 .. _pull 1543: https://github.com/nedbat/coveragepy/pull/1543
 .. _pull 1547: https://github.com/nedbat/coveragepy/pull/1547
 .. _pull 1550: https://github.com/nedbat/coveragepy/pull/1550
 .. _issue 1552: https://github.com/nedbat/coveragepy/issues/1552
+.. _pull 1557: https://github.com/nedbat/coveragepy/pull/1557
+
 
 .. scriv-start-here
 

CONTRIBUTORS.txt

@@ -14,6 +14,7 @@ Alex Groce
 Alex Sandro
 Alexander Todorov
 Alexander Walters
+Alpha Chen
 Ammar Askar
 Andrew Hoos
 Anthony Sottile

doc/config.rst

@@ -400,9 +400,12 @@ you'll exclude any line with three or more of any character. If you write
 [report] exclude_also
 .....................
 
-(multi-string) A list of regular expressions.  This setting will preserve the
-default exclude pattern instead of overwriting it. See
-:ref:`config_report_exclude_lines` for details on exclusion regexes.
+(multi-string) A list of regular expressions.  This setting is the same as
+:ref:`config_report_exclude_lines`: it adds patterns for lines to exclude from
+reporting.  This setting will preserve the default exclude patterns instead of
+overwriting them.
+
+.. versionadded:: 7.2.0
 
 
 .. _config_report_fail_under:

tests/test_config.py

@@ -452,11 +452,12 @@ def test_exceptions_from_missing_things(self) -> None:
     def test_exclude_also(self) -> None:
         self.make_file("pyproject.toml", """\
             [tool.coverage.report]
-            exclude_also = ["foobar"]
+            exclude_also = ["foobar", "raise .*Error"]
             """)
         cov = coverage.Coverage()
 
-        assert cov.config.exclude_list == coverage.config.DEFAULT_EXCLUDE + ["foobar"]
+        expected = coverage.config.DEFAULT_EXCLUDE + ["foobar", "raise .*Error"]
+        assert cov.config.exclude_list == expected
 
 
 class ConfigFileTest(UsingModulesMixin, CoverageTest):