minor cleanups; test.py add --demo option

Testing/demo:

    $ test/test.py --demo regtest

mmgen/ui.py

@@ -74,7 +74,7 @@ def get_readline():
 	else:
 		from getpass import getpass
 		if g.platform == 'win':
-			# MSWin hack - getpass('foo') doesn't flush stderr
+			# MSYS2/MSWin hack - getpass('foo') doesn't flush stderr - TODO: has this been fixed?
 			msg_r(prompt.strip()) # getpass('') adds a space
 			sys.stderr.flush()
 			reply = getpass('')

test/include/pexpect.py

@@ -33,9 +33,8 @@
 	die(2,red(f'Pexpect module is missing.  Cannnot run test suite ({e!r})'))
 
 def debug_pexpect_msg(p):
-	if opt.debug_pexpect:
-		msg('\n{}{}{}'.format( red('BEFORE ['), p.before, red(']') ))
-		msg('{}{}{}'.format( red('MATCH ['), p.after, red(']') ))
+	msg('\n{}{}{}'.format( red('BEFORE ['), p.before, red(']') ))
+	msg('{}{}{}'.format( red('MATCH ['), p.after, red(']') ))
 
 NL = '\n'
 
@@ -154,10 +153,12 @@ def no_overwrite(self):
 
 	def expect_getend(self,s,regex=False):
 		ret = self.expect(s,regex=regex,nonl=True)
-		debug_pexpect_msg(self.p)
+		if opt.debug_pexpect:
+			debug_pexpect_msg(self.p)
 		# readline() of partial lines doesn't work with PopenSpawn, so do this instead:
 		self.expect(NL,nonl=True,silent=True)
-		debug_pexpect_msg(self.p)
+		if opt.debug_pexpect:
+			debug_pexpect_msg(self.p)
 		end = self.p.before.rstrip()
 		if not g.debug:
 			vmsg(f' ==> {cyan(end)}')
@@ -186,14 +187,11 @@ def expect(self,s,t='',delay=None,regex=False,nonl=False,silent=False):
 		if not silent:
 			if opt.verbose:
 				msg_r('EXPECT ' + yellow(str(s)))
-			elif not opt.exact_output: msg_r('+')
+			elif not opt.exact_output:
+				msg_r('+')
 
 		try:
-			if s == '':
-				ret = 0
-			else:
-				f = (self.p.expect_exact,self.p.expect)[bool(regex)]
-				ret = f(s)
+			ret = (self.p.expect_exact,self.p.expect)[bool(regex)](s) if s else 0
 		except pexpect.TIMEOUT:
 			if opt.debug_pexpect:
 				raise
@@ -202,28 +200,30 @@ def expect(self,s,t='',delay=None,regex=False,nonl=False,silent=False):
 			m3 = f'sent value: [{self.sent_value}]' if self.sent_value != None else ''
 			die(2,m1+m2+m3)
 
-		debug_pexpect_msg(self.p)
+		if opt.debug_pexpect:
+			debug_pexpect_msg(self.p)
 
 		if opt.verbose and type(s) != str:
 			msg_r(f' ==> {ret} ')
 
 		if ret == -1:
 			die(4,f'Error.  Expect returned {ret}')
 		else:
-			if t == '':
-				if not nonl and not silent: vmsg('')
-			else:
+			if t:
 				self.send(t,delay,s)
+			else:
+				if not nonl and not silent:
+					vmsg('')
 			return ret
 
 	def send(self,t,delay=None,s=False):
-		self.sent_value = None
 		delay = delay or (0,0.3)[bool(opt.buf_keypress)]
-		if delay: time.sleep(delay)
+		if delay:
+			time.sleep(delay)
 		ret = self.p.send(t) # returns num bytes written
-		if ret:
-			self.sent_value = t
-		if delay: time.sleep(delay)
+		self.sent_value = t if ret else None
+		if opt.demo and delay:
+			time.sleep(delay)
 		if opt.verbose:
 			ls = '' if opt.debug or not s else ' '
 			es = '' if s else '  '

test/test.py

@@ -96,7 +96,12 @@ def create_shm_dir(data_dir,trash_dir):
 os.environ['MMGEN_QUIET'] = '0' # for this script and spawned scripts
 
 opts_data = {
-	'sets': [('list_current_cmd_groups',True,'list_cmd_groups',True)],
+	'sets': [
+		('list_current_cmd_groups',True,'list_cmd_groups',True),
+		('demo',True,'exact_output',True),
+		('demo',True,'buf_keypress',True),
+		('demo',True,'pexpect_spawn',True),
+	],
 	'text': {
 		'desc': 'Test suite for the MMGen suite',
 		'usage':'[options] [command [..command]] | [command_group[.command_subgroup][:command]]',
@@ -111,6 +116,8 @@ def create_shm_dir(data_dir,trash_dir):
 -c, --print-cmdline  Print the command line of each spawned command
 -C, --coverage       Produce code coverage info using trace module
 -x, --debug-pexpect  Produce debugging output for pexpect calls
+--, --demo           Add extra delay after each send to make input visible.
+                     Implies --exact-output --pexpect-spawn --buf-keypress
 -D, --no-daemon-stop Don't stop auto-started daemons after running tests
 -E, --direct-exec    Bypass pexpect and execute a command directly (for
                      debugging only)
@@ -615,7 +622,11 @@ def spawn_wrapper(self,cmd,
 			env.update({ 'EXEC_WRAPPER_TRACEBACK':'' }) # Python 3.9: OR the dicts
 
 		from test.include.pexpect import MMGenPexpect
-		return MMGenPexpect( args, no_output=no_output, env=env, pexpect_spawn=pexpect_spawn )
+		return MMGenPexpect(
+			args          = args,
+			no_output     = no_output,
+			env           = env,
+			pexpect_spawn = pexpect_spawn )
 
 	def end_msg(self):
 		t = int(time.time() - self.start_time)

test/test_py_d/ts_input.py

@@ -190,29 +190,29 @@ def get_passphrase_crypto(self):
 
 		return t
 
-	def password_entry(self,prompt,cmd_args):
-		t = self.spawn('test/misc/password_entry.py',cmd_args,cmd_dir='.')
+	def _password_entry(self,prompt,opts=[],term=False):
+		t = self.spawn( 'test/misc/password_entry.py', opts, cmd_dir='.', pexpect_spawn=term )
+		imsg('Terminal: {}'.format(term))
 		pw = 'abc-α'
 		t.expect(prompt,pw+'\n')
 		ret = t.expect_getend('Entered: ')
 		assert ret == pw, f'Password mismatch! {ret} != {pw}'
 		return t
 
-	def password_entry_noecho(self):
-		if self.skip_for_win():
-			m = "getpass() doesn't work with pexpect.popen_spawn!\n"
-			m += 'Perform the following test by hand with non-ASCII password abc-α:\n'
-			m += '  test/misc/password_entry.py'
-			return ('skip_warn',m)
-		return self.password_entry('Enter passphrase: ',[])
-
-	def password_entry_echo(self):
-		if self.skip_for_win():
-			m = "getpass() doesn't work with pexpect.popen_spawn!\n"
-			m += 'Perform the following test by hand with non-ASCII password abc-α:\n'
-			m += '  test/misc/password_entry.py --echo-passphrase'
-			return ('skip_warn',m)
-		return self.password_entry('Enter passphrase (echoed): ',['--echo-passphrase'])
+	# TODO: has this been fixed?
+	winskip_msg = """
+		getpass() doesn't work with pexpect.popen_spawn on MSYS2!
+		Perform the following test by hand with non-ASCII password abc-α
+		or another password in your native alphabet:
+
+		  test/misc/input_func.py{} passphrase
+	"""
+
+	def password_entry_noecho(self,term=False):
+		return self._password_entry('Enter passphrase: ',term=term)
+
+	def password_entry_echo(self,term=False):
+		return self._password_entry('Enter passphrase (echoed): ',['--echo-passphrase'],term=term)
 
 	def _mn2hex(self,fmt,entry_mode='full',mn=None,pad_entry=False,enter_for_dfl=False):
 		mn = mn or sample_mn[fmt]['mn'].split()