fix: input.stream is null when copied for namespaced commands (#135)

* Fix issue where input copies did not include stream, leading to null errors in some cases.

* Add appropriate tests.

* Fix to meet pre-commit requirements.

* Remove unneeded test in test_command.py

Co-authored-by: Chad Crawford <chadcr@amazon.com>

cleo/application.py

@@ -416,7 +416,9 @@ def _run(self, io: IO) -> int:
             if index is not None:
                 del argv[index + 1 : index + 1 + (len(name.split(" ")) - 1)]
 
+            stream = io.input.stream
             io.set_input(ArgvInput(argv))
+            io.input.set_stream(stream)
 
         exit_code = self._run_command(command, io)
         self._running_command = None

tests/fixtures/foo3_command.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+from cleo.commands.command import Command
+
+
+class Foo3Command(Command):
+
+    name = "foo3"
+
+    description = "The foo3 bar command"
+
+    aliases = ["foo3"]
+
+    def handle(self) -> int:
+        question = self.ask("echo:")
+        self.line(question)
+        return 0

tests/fixtures/foo_sub_namespaced3_command.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+from cleo.commands.command import Command
+
+
+class FooSubNamespaced3Command(Command):
+
+    name = "foo bar"
+
+    description = "The foo bar command"
+
+    aliases = ["foobar"]
+
+    def handle(self) -> int:
+        question = self.ask("")
+        self.line(question)
+        return 0

tests/test_application.py

@@ -16,9 +16,11 @@
 from cleo.testers.application_tester import ApplicationTester
 from tests.fixtures.foo1_command import Foo1Command
 from tests.fixtures.foo2_command import Foo2Command
+from tests.fixtures.foo3_command import Foo3Command
 from tests.fixtures.foo_command import FooCommand
 from tests.fixtures.foo_sub_namespaced1_command import FooSubNamespaced1Command
 from tests.fixtures.foo_sub_namespaced2_command import FooSubNamespaced2Command
+from tests.fixtures.foo_sub_namespaced3_command import FooSubNamespaced3Command
 
 
 FIXTURES_PATH = Path(__file__).parent.joinpath("fixtures")
@@ -345,3 +347,27 @@ def test_run_with_help(tester: ApplicationTester):
         tester.io.fetch_output()
         == FIXTURES_PATH.joinpath("application_run5.txt").read_text()
     )
+
+
+def test_run_with_input():
+    app = Application()
+    command = Foo3Command()
+    app.add(command)
+
+    tester = ApplicationTester(app)
+    status_code = tester.execute("foo3", inputs="Hello world!")
+
+    assert status_code == 0
+    assert tester.io.fetch_output() == "Hello world!\n"
+
+
+def test_run_namespaced_with_input():
+    app = Application()
+    command = FooSubNamespaced3Command()
+    app.add(command)
+
+    tester = ApplicationTester(app)
+    status_code = tester.execute("foo bar", inputs="Hello world!")
+
+    assert status_code == 0
+    assert tester.io.fetch_output() == "Hello world!\n"