Issue 6471 - Introduce new option to skip header and summary

AUTHORS

@@ -227,6 +227,7 @@ Pedro Algarvio
 Philipp Loose
 Pieter Mulder
 Piotr Banaszkiewicz
+Piotr Helm
 Prashant Anand
 Pulkit Goyal
 Punyashloka Biswal

changelog/6471.feature.rst

@@ -0,0 +1,4 @@
+New command-line flags:
+
+* `--no-header`: disables the initial header, including platform, version, and plugins.
+* `--no-summary`: disables the final test summary, including warnings.

src/_pytest/terminal.py

@@ -115,6 +115,20 @@ def pytest_addoption(parser: Parser) -> None:
         dest="verbose",
         help="increase verbosity.",
     )
+    group._addoption(
+        "--no-header",
+        action="store_true",
+        default=False,
+        dest="no_header",
+        help="disable header",
+    )
+    group._addoption(
+        "--no-summary",
+        action="store_true",
+        default=False,
+        dest="no_summary",
+        help="disable summary",
+    )
     group._addoption(
         "-q",
         "--quiet",
@@ -351,6 +365,14 @@ def verbosity(self) -> int:
     def showheader(self) -> bool:
         return self.verbosity >= 0
 
+    @property
+    def no_header(self) -> bool:
+        return bool(self.config.option.no_header)
+
+    @property
+    def no_summary(self) -> bool:
+        return bool(self.config.option.no_summary)
+
     @property
     def showfspath(self) -> bool:
         if self._showfspath is None:
@@ -660,25 +682,26 @@ def pytest_sessionstart(self, session: "Session") -> None:
             return
         self.write_sep("=", "test session starts", bold=True)
         verinfo = platform.python_version()
-        msg = "platform {} -- Python {}".format(sys.platform, verinfo)
-        pypy_version_info = getattr(sys, "pypy_version_info", None)
-        if pypy_version_info:
-            verinfo = ".".join(map(str, pypy_version_info[:3]))
-            msg += "[pypy-{}-{}]".format(verinfo, pypy_version_info[3])
-        msg += ", pytest-{}, py-{}, pluggy-{}".format(
-            pytest.__version__, py.__version__, pluggy.__version__
-        )
-        if (
-            self.verbosity > 0
-            or self.config.option.debug
-            or getattr(self.config.option, "pastebin", None)
-        ):
-            msg += " -- " + str(sys.executable)
-        self.write_line(msg)
-        lines = self.config.hook.pytest_report_header(
-            config=self.config, startdir=self.startdir
-        )
-        self._write_report_lines_from_hooks(lines)
+        if not self.no_header:
+            msg = "platform {} -- Python {}".format(sys.platform, verinfo)
+            pypy_version_info = getattr(sys, "pypy_version_info", None)
+            if pypy_version_info:
+                verinfo = ".".join(map(str, pypy_version_info[:3]))
+                msg += "[pypy-{}-{}]".format(verinfo, pypy_version_info[3])
+            msg += ", pytest-{}, py-{}, pluggy-{}".format(
+                pytest.__version__, py.__version__, pluggy.__version__
+            )
+            if (
+                self.verbosity > 0
+                or self.config.option.debug
+                or getattr(self.config.option, "pastebin", None)
+            ):
+                msg += " -- " + str(sys.executable)
+            self.write_line(msg)
+            lines = self.config.hook.pytest_report_header(
+                config=self.config, startdir=self.startdir
+            )
+            self._write_report_lines_from_hooks(lines)
 
     def _write_report_lines_from_hooks(
         self, lines: List[Union[str, List[str]]]
@@ -775,7 +798,7 @@ def pytest_sessionfinish(
             ExitCode.USAGE_ERROR,
             ExitCode.NO_TESTS_COLLECTED,
         )
-        if exitstatus in summary_exit_codes:
+        if exitstatus in summary_exit_codes and not self.no_summary:
             self.config.hook.pytest_terminal_summary(
                 terminalreporter=self, exitstatus=exitstatus, config=self.config
             )

testing/test_terminal.py

@@ -698,6 +698,29 @@ def test_passes():
         if request.config.pluginmanager.list_plugin_distinfo():
             result.stdout.fnmatch_lines(["plugins: *"])
 
+    def test_no_header_trailer_info(self, testdir, request):
+        testdir.monkeypatch.delenv("PYTEST_DISABLE_PLUGIN_AUTOLOAD")
+        testdir.makepyfile(
+            """
+            def test_passes():
+                pass
+        """
+        )
+        result = testdir.runpytest("--no-header")
+        verinfo = ".".join(map(str, sys.version_info[:3]))
+        result.stdout.no_fnmatch_line(
+            "platform %s -- Python %s*pytest-%s*py-%s*pluggy-%s"
+            % (
+                sys.platform,
+                verinfo,
+                pytest.__version__,
+                py.__version__,
+                pluggy.__version__,
+            )
+        )
+        if request.config.pluginmanager.list_plugin_distinfo():
+            result.stdout.no_fnmatch_line("plugins: *")
+
     def test_header(self, testdir):
         testdir.tmpdir.join("tests").ensure_dir()
         testdir.tmpdir.join("gui").ensure_dir()
@@ -727,6 +750,36 @@ def test_header(self, testdir):
         result = testdir.runpytest("tests")
         result.stdout.fnmatch_lines(["rootdir: *test_header0, configfile: tox.ini"])
 
+    def test_no_header(self, testdir):
+        testdir.tmpdir.join("tests").ensure_dir()
+        testdir.tmpdir.join("gui").ensure_dir()
+
+        # with testpaths option, and not passing anything in the command-line
+        testdir.makeini(
+            """
+            [pytest]
+            testpaths = tests gui
+        """
+        )
+        result = testdir.runpytest("--no-header")
+        result.stdout.no_fnmatch_line(
+            "rootdir: *test_header0, inifile: tox.ini, testpaths: tests, gui"
+        )
+
+        # with testpaths option, passing directory in command-line: do not show testpaths then
+        result = testdir.runpytest("tests", "--no-header")
+        result.stdout.no_fnmatch_line("rootdir: *test_header0, inifile: tox.ini")
+
+    def test_no_summary(self, testdir):
+        p1 = testdir.makepyfile(
+            """
+            def test_no_summary():
+                assert false
+        """
+        )
+        result = testdir.runpytest(p1, "--no-summary")
+        result.stdout.no_fnmatch_line("*= FAILURES =*")
+
     def test_showlocals(self, testdir):
         p1 = testdir.makepyfile(
             """
@@ -1483,6 +1536,21 @@ def test_failure():
     assert stdout.count("=== warnings summary ") == 1
 
 
+@pytest.mark.filterwarnings("default")
+def test_terminal_no_summary_warnings_header_once(testdir):
+    testdir.makepyfile(
+        """
+        def test_failure():
+            import warnings
+            warnings.warn("warning_from_" + "test")
+            assert 0
+    """
+    )
+    result = testdir.runpytest("--no-summary")
+    result.stdout.no_fnmatch_line("*= warnings summary =*")
+    result.stdout.no_fnmatch_line("*= short test summary info =*")
+
+
 @pytest.fixture(scope="session")
 def tr() -> TerminalReporter:
     config = _pytest.config._prepareconfig()
@@ -2130,6 +2198,12 @@ def test_collecterror(testdir):
     )
 
 
+def test_no_summary_collecterror(testdir):
+    p1 = testdir.makepyfile("raise SyntaxError()")
+    result = testdir.runpytest("-ra", "--no-summary", str(p1))
+    result.stdout.no_fnmatch_line("*= ERRORS =*")
+
+
 def test_via_exec(testdir: Testdir) -> None:
     p1 = testdir.makepyfile("exec('def test_via_exec(): pass')")
     result = testdir.runpytest(str(p1), "-vv")