1 files changed, 139 insertions, 0 deletions
diff --git a/setuptools/_distutils/tests/test_spawn.py b/setuptools/_distutils/tests/test_spawn.py
new file mode 100644
index 00000000..f620da78
--- /dev/null
+++ b/setuptools/_distutils/tests/test_spawn.py
@@ -0,0 +1,139 @@
+"""Tests for distutils.spawn."""
+import os
+import stat
+import sys
+import unittest.mock
+from test.support import run_unittest
+
+from .py35compat import unix_shell
+from . import py38compat as os_helper
+
+from distutils.spawn import find_executable
+from distutils.spawn import spawn
+from distutils.errors import DistutilsExecError
+from distutils.tests import support
+
+class SpawnTestCase(support.TempdirManager,
+                    support.LoggingSilencer,
+                    unittest.TestCase):
+
+    @unittest.skipUnless(os.name in ('nt', 'posix'),
+                         'Runs only under posix or nt')
+    def test_spawn(self):
+        tmpdir = self.mkdtemp()
+
+        # creating something executable
+        # through the shell that returns 1
+        if sys.platform != 'win32':
+            exe = os.path.join(tmpdir, 'foo.sh')
+            self.write_file(exe, '#!%s\nexit 1' % unix_shell)
+        else:
+            exe = os.path.join(tmpdir, 'foo.bat')
+            self.write_file(exe, 'exit 1')
+
+        os.chmod(exe, 0o777)
+        self.assertRaises(DistutilsExecError, spawn, [exe])
+
+        # now something that works
+        if sys.platform != 'win32':
+            exe = os.path.join(tmpdir, 'foo.sh')
+            self.write_file(exe, '#!%s\nexit 0' % unix_shell)
+        else:
+            exe = os.path.join(tmpdir, 'foo.bat')
+            self.write_file(exe, 'exit 0')
+
+        os.chmod(exe, 0o777)
+        spawn([exe])  # should work without any error
+
+    def test_find_executable(self):
+        with os_helper.temp_dir() as tmp_dir:
+            # use TESTFN to get a pseudo-unique filename
+            program_noeext = os_helper.TESTFN
+            # Give the temporary program an ".exe" suffix for all.
+            # It's needed on Windows and not harmful on other platforms.
+            program = program_noeext + ".exe"
+
+            filename = os.path.join(tmp_dir, program)
+            with open(filename, "wb"):
+                pass
+            os.chmod(filename, stat.S_IXUSR)
+
+            # test path parameter
+            rv = find_executable(program, path=tmp_dir)
+            self.assertEqual(rv, filename)
+
+            if sys.platform == 'win32':
+                # test without ".exe" extension
+                rv = find_executable(program_noeext, path=tmp_dir)
+                self.assertEqual(rv, filename)
+
+            # test find in the current directory
+            with os_helper.change_cwd(tmp_dir):
+                rv = find_executable(program)
+                self.assertEqual(rv, program)
+
+            # test non-existent program
+            dont_exist_program = "dontexist_" + program
+            rv = find_executable(dont_exist_program , path=tmp_dir)
+            self.assertIsNone(rv)
+
+            # PATH='': no match, except in the current directory
+            with os_helper.EnvironmentVarGuard() as env:
+                env['PATH'] = ''
+                with unittest.mock.patch('distutils.spawn.os.confstr',
+                                         return_value=tmp_dir, create=True), \
+                     unittest.mock.patch('distutils.spawn.os.defpath',
+                                         tmp_dir):
+                    rv = find_executable(program)
+                    self.assertIsNone(rv)
+
+                    # look in current directory
+                    with os_helper.change_cwd(tmp_dir):
+                        rv = find_executable(program)
+                        self.assertEqual(rv, program)
+
+            # PATH=':': explicitly looks in the current directory
+            with os_helper.EnvironmentVarGuard() as env:
+                env['PATH'] = os.pathsep
+                with unittest.mock.patch('distutils.spawn.os.confstr',
+                                         return_value='', create=True), \
+                     unittest.mock.patch('distutils.spawn.os.defpath', ''):
+                    rv = find_executable(program)
+                    self.assertIsNone(rv)
+
+                    # look in current directory
+                    with os_helper.change_cwd(tmp_dir):
+                        rv = find_executable(program)
+                        self.assertEqual(rv, program)
+
+            # missing PATH: test os.confstr("CS_PATH") and os.defpath
+            with os_helper.EnvironmentVarGuard() as env:
+                env.pop('PATH', None)
+
+                # without confstr
+                with unittest.mock.patch('distutils.spawn.os.confstr',
+                                         side_effect=ValueError,
+                                         create=True), \
+                     unittest.mock.patch('distutils.spawn.os.defpath',
+                                         tmp_dir):
+                    rv = find_executable(program)
+                    self.assertEqual(rv, filename)
+
+                # with confstr
+                with unittest.mock.patch('distutils.spawn.os.confstr',
+                                         return_value=tmp_dir, create=True), \
+                     unittest.mock.patch('distutils.spawn.os.defpath', ''):
+                    rv = find_executable(program)
+                    self.assertEqual(rv, filename)
+
+    def test_spawn_missing_exe(self):
+        with self.assertRaises(DistutilsExecError) as ctx:
+            spawn(['does-not-exist'])
+        self.assertIn("command 'does-not-exist' failed", str(ctx.exception))
+
+
+def test_suite():
+    return unittest.makeSuite(SpawnTestCase)
+
+if __name__ == "__main__":
+    run_unittest(test_suite())