Allow file objects to be passed to loop.subprocess* functions.

Fixes #136.

tests/test_process.py

@@ -342,6 +342,10 @@ class _AsyncioTests:
                   'data = sys.stdin.buffer.read()',
                   'sys.stdout.buffer.write(data)'))]
 
+    PROGRAM_ERROR = [
+        sys.executable, '-c', '1/0'
+    ]
+
     def test_stdin_not_inheritable(self):
         # asyncio issue #209: stdin must not be inheritable, otherwise
         # the Process.communicate() hangs
@@ -363,7 +367,7 @@ def len_message(message):
         self.assertEqual(output.rstrip(), b'3')
         self.assertEqual(exitcode, 0)
 
-    def test_stdin_stdout(self):
+    def test_stdin_stdout_pipe(self):
         args = self.PROGRAM_CAT
 
         @asyncio.coroutine
@@ -390,6 +394,57 @@ def run(data):
         self.assertEqual(exitcode, 0)
         self.assertEqual(stdout, b'some data')
 
+    def test_stdin_stdout_file(self):
+        args = self.PROGRAM_CAT
+
+        @asyncio.coroutine
+        def run(data, stderr):
+            proc = yield from asyncio.create_subprocess_exec(
+                *args,
+                stdin=subprocess.PIPE,
+                stderr=stdout,
+                loop=self.loop)
+
+            # feed data
+            proc.stdin.write(data)
+            yield from proc.stdin.drain()
+            proc.stdin.close()
+
+            exitcode = yield from proc.wait()
+            return exitcode
+
+        with tempfile.TemporaryFile('w+b') as new_stdout:
+            task = run(b'some data', new_stdout)
+            task = asyncio.wait_for(task, 60.0, loop=self.loop)
+            exitcode = self.loop.run_until_complete(task)
+            self.assertEqual(exitcode, 0)
+
+            new_stdout.seek(0)
+            self.assertEqual(new_stdout.read(), b'some data')
+
+    def test_stdin_stderr_file(self):
+        args = self.PROGRAM_ERROR
+
+        @asyncio.coroutine
+        def run(stderr):
+            proc = yield from asyncio.create_subprocess_exec(
+                *args,
+                stdin=subprocess.PIPE,
+                stderr=stderr,
+                loop=self.loop)
+
+            exitcode = yield from proc.wait()
+            return exitcode
+
+        with tempfile.TemporaryFile('w+b') as new_stderr:
+            task = run(new_stderr)
+            task = asyncio.wait_for(task, 60.0, loop=self.loop)
+            exitcode = self.loop.run_until_complete(task)
+            self.assertEqual(exitcode, 1)
+
+            new_stderr.seek(0)
+            self.assertIn(b'ZeroDivisionError', new_stderr.read())
+
     def test_communicate(self):
         args = self.PROGRAM_CAT
 

uvloop/handles/process.pyx

@@ -424,8 +424,7 @@ cdef class UVProcessTransport(UVProcess):
                 raise ValueError(
                     'subprocess.STDOUT is supported only by stderr parameter')
             else:
-                raise ValueError(
-                    'invalid stdin argument value {!r}'.format(_stdin))
+                io[0] = self._file_redirect_stdio(_stdin)
         else:
             io[0] = self._file_redirect_stdio(sys.stdin.fileno())
 
@@ -453,8 +452,7 @@ cdef class UVProcessTransport(UVProcess):
                 raise ValueError(
                     'subprocess.STDOUT is supported only by stderr parameter')
             else:
-                raise ValueError(
-                    'invalid stdout argument value {!r}'.format(_stdout))
+                io[1] = self._file_redirect_stdio(_stdout)
         else:
             io[1] = self._file_redirect_stdio(sys.stdout.fileno())
 
@@ -482,8 +480,7 @@ cdef class UVProcessTransport(UVProcess):
             elif _stderr == subprocess_DEVNULL:
                 io[2] = self._file_devnull()
             else:
-                raise ValueError(
-                    'invalid stderr argument value {!r}'.format(_stderr))
+                io[2] = self._file_redirect_stdio(_stderr)
         else:
             io[2] = self._file_redirect_stdio(sys.stderr.fileno())