feat: add --report-chars long option and its corresponding test

AUTHORS

@@ -237,6 +237,7 @@ Joseph Sawaya
 Josh Karpel
 Joshua Bronson
 Julian Valentin
+Junhao Liao
 Jurko Gospodnetić
 Justice Ndou
 Justyna Janczyszyn

changelog/14023.feature.rst

@@ -0,0 +1 @@
+Added `--report-chars` long CLI option.

doc/en/reference/reference.rst

@@ -2910,7 +2910,7 @@ Output and Reporting
 
     Set verbosity level explicitly. Default: 0.
 
-.. option:: -r CHARS
+.. option:: -r CHARS, --report-chars=CHARS
 
     Show extra test summary info as specified by chars:
 

src/_pytest/terminal.py

@@ -189,6 +189,7 @@ def pytest_addoption(parser: Parser) -> None:
     )
     group._addoption(  # private to use reserved lower-case short option
         "-r",
+        "--report-chars",
         action="store",
         dest="reportchars",
         default=_REPORTCHARS_DEFAULT,

testing/test_config.py

@@ -97,6 +97,21 @@ def test_append_parse_args(
         assert config.option.tbstyle == "short"
         assert config.option.verbose
 
+    @pytest.mark.parametrize("flag", ("-r", "--report-chars="))
+    @pytest.mark.parametrize("value", ("fE", "A", "fs"))
+    def test_report_chars_option(
+        self,
+        pytester: Pytester,
+        tmp_path: Path,
+        monkeypatch: MonkeyPatch,
+        flag: str,
+        value: str,
+    ) -> None:
+        """Test that -r/--report-chars is parsed correctly."""
+        monkeypatch.setenv("PYTEST_ADDOPTS", flag + value)
+        config = pytester.parseconfig(tmp_path)
+        assert config.option.reportchars == value
+
     def test_tox_ini_wrong_version(self, pytester: Pytester) -> None:
         pytester.makefile(
             ".ini",