Add shell-style wildcard support to 'testpaths'

The implementation uses the standard `glob` module to perform wildcard
expansion in Config.parse().

The related logic that determines whether or not to include 'testpaths'
in the terminal header was previously relying on a weak heuristic: if
Config.args matched 'testpaths', then its value was printed. That
generally worked, but it could also print when the user explicitly used
the same arguments on the command-line as listed in 'testpaths'. Not a
big deal, but it shows that the check was logically incorrect.

Now that 'testpaths' can contain wildcards, it's no longer possible to
perform this simple comparison, so this change also introduces a public
Config.ArgSource enum and Config.args_source attribute that explicitly
names the "source" of the arguments: the command line, the invocation
directory, or the 'testdata' configuration value.

AUTHORS

@@ -164,6 +164,7 @@ Jeff Widman
 Jenni Rinker
 John Eddie Ayson
 John Towler
+Jon Parise
 Jon Sonesen
 Jonas Obrist
 Jordan Guymon

changelog/9897.feature.rst

@@ -0,0 +1 @@
+Added shell-style wildcard support to ``testpaths``.

doc/en/reference/reference.rst

@@ -1761,6 +1761,7 @@ passed multiple times. The expected format is ``name=value``. For example::
    Sets list of directories that should be searched for tests when
    no specific directories, files or test ids are given in the command line when
    executing pytest from the :ref:`rootdir <rootdir>` directory.
+   May use shell-style wildcards, including the recursive ``**`` pattern.
    Useful when all project tests are in a known location to speed up
    test collection and to avoid picking up undesired tests by accident.
 

src/_pytest/config/__init__.py

@@ -3,6 +3,7 @@
 import collections.abc
 import copy
 import enum
+import glob
 import inspect
 import os
 import re
@@ -899,6 +900,20 @@ class InvocationParams:
         dir: Path
         """The directory from which :func:`pytest.main` was invoked."""
 
+    @final
+    class ArgsSource(enum.IntEnum):
+        """Indicates the source of the test arguments.
+
+        .. versionadded:: 7.2
+        """
+
+        #: Command line arguments.
+        ARGS = 0
+        #: Invocation directory.
+        INCOVATION_DIR = 1
+        #: 'testpaths' configuration value.
+        TESTPATHS = 2
+
     def __init__(
         self,
         pluginmanager: PytestPluginManager,
@@ -1308,15 +1323,22 @@ def parse(self, args: List[str], addopts: bool = True) -> None:
         self.hook.pytest_cmdline_preparse(config=self, args=args)
         self._parser.after_preparse = True  # type: ignore
         try:
+            source = Config.ArgsSource.ARGS
             args = self._parser.parse_setoption(
                 args, self.option, namespace=self.option
             )
             if not args:
                 if self.invocation_params.dir == self.rootpath:
-                    args = self.getini("testpaths")
+                    args = []
+                    source = Config.ArgsSource.TESTPATHS
+                    testpaths = cast(List[str], self.getini("testpaths"))
+                    for path in testpaths:
+                        args.extend(glob.iglob(path, recursive=True))
                 if not args:
+                    source = Config.ArgsSource.INCOVATION_DIR
                     args = [str(self.invocation_params.dir)]
             self.args = args
+            self.args_source = source
         except PrintHelp:
             pass
 

src/_pytest/terminal.py

@@ -728,8 +728,8 @@ def pytest_report_header(self, config: Config) -> List[str]:
         if config.inipath:
             line += ", configfile: " + bestrelpath(config.rootpath, config.inipath)
 
-        testpaths: List[str] = config.getini("testpaths")
-        if config.invocation_params.dir == config.rootpath and config.args == testpaths:
+        if config.args_source == Config.ArgsSource.TESTPATHS:
+            testpaths: List[str] = config.getini("testpaths")
             line += ", testpaths: {}".format(", ".join(testpaths))
 
         result = [line]

testing/test_collection.py

@@ -1207,26 +1207,25 @@ def test_1():
 def test_collect_pyargs_with_testpaths(
     pytester: Pytester, monkeypatch: MonkeyPatch
 ) -> None:
-    testmod = pytester.mkdir("testmod")
-    # NOTE: __init__.py is not collected since it does not match python_files.
-    testmod.joinpath("__init__.py").write_text("def test_func(): pass")
-    testmod.joinpath("test_file.py").write_text("def test_func(): pass")
+    for i in range(3):
+        testpkg = pytester.mkpydir(f"tests{i}")
+        testmod = pytester.mkdir(str(testpkg.joinpath("testmod")))
+        # NOTE: __init__.py is not collected since it does not match python_files.
+        testmod.joinpath("__init__.py").write_text("def test_func(): pass")
+        testmod.joinpath("test_file.py").write_text("def test_func(): pass")
 
-    root = pytester.mkdir("root")
-    root.joinpath("pytest.ini").write_text(
-        textwrap.dedent(
-            """
+    pytester.makeini(
+        """
         [pytest]
         addopts = --pyargs
-        testpaths = testmod
+        testpaths = tests*/testmod
     """
-        )
     )
     monkeypatch.setenv("PYTHONPATH", str(pytester.path), prepend=os.pathsep)
     with monkeypatch.context() as mp:
-        mp.chdir(root)
+        mp.chdir(pytester.path)
         result = pytester.runpytest_subprocess()
-    result.stdout.fnmatch_lines(["*1 passed in*"])
+    result.stdout.fnmatch_lines(["*3 passed in*"])
 
 
 def test_collect_symlink_file_arg(pytester: Pytester) -> None: