tw.view: create fake versions of CUR_* vars in overlay

mmgen/tw/view.py

@@ -32,6 +32,7 @@ from ..util import msg,msg_r,fmt,die,capfirst,make_timestr
 from ..rpc import rpc_init
 from ..base_obj import AsyncInit
 
+# these are replaced by fake versions in overlay:
 CUR_HOME  = '\033[H'
 CUR_UP    = lambda n: f'\033[{n}A'
 CUR_DOWN  = lambda n: f'\033[{n}B'
@@ -513,9 +514,7 @@ class TwView(MMGenObject,metaclass=AsyncInit):
 		prompt += '\b'
 
 		self.cursor_to_end_of_prompt = CUR_RIGHT( len(prompt.split('\n')[-1]) - 2 )
-		clear_screen = (
-			'\n\n' if (opt.no_blank or g.test_suite) else
-			CUR_HOME + ('' if scroll else ERASE_ALL) )
+		clear_screen = '\n\n' if opt.no_blank else CUR_HOME + ('' if scroll else ERASE_ALL)
 
 		if scroll:
 			term = get_term()
@@ -523,9 +522,6 @@ class TwView(MMGenObject,metaclass=AsyncInit):
 			term.set('noecho')
 			get_char = get_char_raw
 
-		if not (opt.no_blank or g.test_suite):
-			msg_r(CUR_HOME + ERASE_ALL)
-
 		while True:
 
 			if self.oneshot_msg and scroll:

test/overlay/fakemods/mmgen/tw/view.py

@@ -1,5 +1,12 @@
 import os as overlay_fake_os
 from .view_orig import *
+import mmgen.tw.view_orig as overlay_fake_orig_mod
+
+overlay_fake_orig_mod.CUR_HOME  = '\n[CUR_HOME]\n'
+overlay_fake_orig_mod.CUR_UP    = lambda n: f'\n[CUR_UP({n})]\n'
+overlay_fake_orig_mod.CUR_DOWN  = lambda n: f'\n[CUR_DOWN({n})]\n'
+overlay_fake_orig_mod.CUR_RIGHT = lambda n: f'\n[CUR_RIGHT({n})]\n'
+overlay_fake_orig_mod.ERASE_ALL = '\n[ERASE_ALL]\n'
 
 if overlay_fake_os.getenv('MMGEN_TEST_SUITE_DETERMINISTIC'):