tools: allow input for TTY tests

Since faking TTY input is not otherwise fake-able, we need
support in the test runner for it.

Backport-PR-URL: #25351
PR-URL: #23053
Reviewed-By: James M Snell <jasnell@gmail.com>

test/pseudo-tty/testcfg.py

@@ -35,10 +35,11 @@
 
 class TTYTestCase(test.TestCase):
 
-  def __init__(self, path, file, expected, arch, mode, context, config):
+  def __init__(self, path, file, expected, input, arch, mode, context, config):
     super(TTYTestCase, self).__init__(context, path, arch, mode)
     self.file = file
     self.expected = expected
+    self.input = input
     self.config = config
     self.arch = arch
     self.mode = mode
@@ -104,12 +105,16 @@ def GetSource(self):
           + open(self.expected).read())
 
   def RunCommand(self, command, env):
+    input = None
+    if self.input is not None and exists(self.input):
+      input = open(self.input).read()
     full_command = self.context.processor(command)
     output = test.Execute(full_command,
                      self.context,
                      self.context.GetTimeout(self.mode),
                      env,
-                     True)
+                     faketty=True,
+                     input=input)
     self.Cleanup()
     return test.TestOutput(self,
                       full_command,
@@ -140,11 +145,12 @@ def ListTests(self, current_path, path, arch, mode):
       if self.Contains(path, test):
         file_prefix = join(self.root, reduce(join, test[1:], ""))
         file_path = file_prefix + ".js"
+        input_path = file_prefix + ".in"
         output_path = file_prefix + ".out"
         if not exists(output_path):
           raise Exception("Could not find %s" % output_path)
         result.append(TTYTestCase(test, file_path, output_path,
-                                      arch, mode, self.context, self))
+                                  input_path, arch, mode, self.context, self))
     return result
 
   def GetBuildRequirements(self):

tools/test.py

@@ -717,12 +717,23 @@ def CheckedUnlink(name):
       PrintError("os.unlink() " + str(e))
     break
 
-def Execute(args, context, timeout=None, env={}, faketty=False, disable_core_files=False):
+def Execute(args, context, timeout=None, env={}, faketty=False, disable_core_files=False, input=None):
   if faketty:
     import pty
     (out_master, fd_out) = pty.openpty()
     fd_in = fd_err = fd_out
     pty_out = out_master
+
+    if input is not None:
+      # Before writing input data, disable echo so the input doesn't show
+      # up as part of the output.
+      import termios
+      attr = termios.tcgetattr(fd_in)
+      attr[3] = attr[3] & ~termios.ECHO
+      termios.tcsetattr(fd_in, termios.TCSADRAIN, attr)
+
+      os.write(pty_out, input)
+      os.write(pty_out, '\x04') # End-of-file marker (Ctrl+D)
   else:
     (fd_out, outname) = tempfile.mkstemp()
     (fd_err, errname) = tempfile.mkstemp()