Add shell-style wildcard support to 'testpaths' (#9897)

This is especially useful for large repositories (e.g. monorepos) that
use a hierarchical file system organization for nested test paths.

    src/*/tests

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

@@ -165,6 +165,7 @@ 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

@@ -1699,6 +1699,8 @@ 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.
+   File system paths 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 argparse
 import collections.abc
 import copy
 import enum
+import glob
 import inspect
 import os
 import re
@@ -899,6 +900,19 @@ class Config:
         dir: Path
         """The directory from which :func:`pytest.main` was invoked."""
 
+    class ArgsSource(enum.Enum):
+        """Indicates the source of the test arguments.
+
+        .. versionadded:: 7.2
+        """
+
+        #: Command line arguments.
+        ARGS = enum.auto()
+        #: Invocation directory.
+        INCOVATION_DIR = enum.auto()
+        #: 'testpaths' configuration value.
+        TESTPATHS = enum.auto()
+
     def __init__(
         self,
         pluginmanager: PytestPluginManager,
@@ -1308,15 +1322,25 @@ class Config:
         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")
+                    source = Config.ArgsSource.TESTPATHS
+                    testpaths: List[str] = self.getini("testpaths")
+                    if self.known_args_namespace.pyargs:
+                        args = testpaths
+                    else:
+                        args = []
+                        for path in testpaths:
+                            args.extend(sorted(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

@@ -730,8 +730,8 @@ class TerminalReporter:
         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

@@ -244,28 +244,32 @@ class TestCollectFS:
         pytester.makeini(
             """
             [pytest]
-            testpaths = gui uts
+            testpaths = */tests
         """
         )
         tmp_path = pytester.path
-        ensure_file(tmp_path / "env" / "test_1.py").write_text("def test_env(): pass")
-        ensure_file(tmp_path / "gui" / "test_2.py").write_text("def test_gui(): pass")
-        ensure_file(tmp_path / "uts" / "test_3.py").write_text("def test_uts(): pass")
+        ensure_file(tmp_path / "a" / "test_1.py").write_text("def test_a(): pass")
+        ensure_file(tmp_path / "b" / "tests" / "test_2.py").write_text(
+            "def test_b(): pass"
+        )
+        ensure_file(tmp_path / "c" / "tests" / "test_3.py").write_text(
+            "def test_c(): pass"
+        )
 
         # executing from rootdir only tests from `testpaths` directories
         # are collected
         items, reprec = pytester.inline_genitems("-v")
-        assert [x.name for x in items] == ["test_gui", "test_uts"]
+        assert [x.name for x in items] == ["test_b", "test_c"]
 
         # check that explicitly passing directories in the command-line
         # collects the tests
-        for dirname in ("env", "gui", "uts"):
+        for dirname in ("a", "b", "c"):
             items, reprec = pytester.inline_genitems(tmp_path.joinpath(dirname))
             assert [x.name for x in items] == ["test_%s" % dirname]
 
         # changing cwd to each subdirectory and running pytest without
         # arguments collects the tests in that directory normally
-        for dirname in ("env", "gui", "uts"):
+        for dirname in ("a", "b", "c"):
             monkeypatch.chdir(pytester.path.joinpath(dirname))
             items, reprec = pytester.inline_genitems()
             assert [x.name for x in items] == ["test_%s" % dirname]