vi: Add tests

Test file integrity after load, move, delete and save+exit. Drawing
of buffer is not tested yet.

Added -s script option, accept file that is run as startup script of
commands. File is parsed byte at time and handled as you had typed it.
If EOF has been reached without editor close command, editing is
continued normally using keyboard. This functionality is in vim and
neovim, but not in POSIX vi standard. nvi (vi used in some macs) has
-s with different meaning...

Some simple tests added, dw last line test fails, so test is disabled.

1 files changed, 17 insertions, 3 deletions

diff --git a/toys/pending/vi.c b/toys/pending/vi.c
index 9c47a4c5..a21867b2 100644
--- a/toys/pending/vi.c
+++ b/toys/pending/vi.c
@@ -5,13 +5,14 @@
  *
  * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/vi.html
 
-USE_VI(NEWTOY(vi, "<1>1", TOYFLAG_USR|TOYFLAG_BIN))
+USE_VI(NEWTOY(vi, ">1s:", TOYFLAG_USR|TOYFLAG_BIN))
 
 config VI
   bool "vi"
   default n
   help
-    usage: vi FILE
+    usage: vi [-s script] FILE
+    -s script: run script file
     Visual text editor. Predates the existence of standardized cursor keys,
     so the controls are weird and historical.
 */
@@ -20,6 +21,7 @@ config VI
 #include "toys.h"
 
 GLOBALS(
+    char *s;
     int cur_col;
     int cur_row;
     int scr_row;
@@ -885,6 +887,8 @@ void vi_main(void)
   char vi_buf[16] = {0};
   char utf8_code[8] = {0};
   int utf8_dec_p = 0, vi_buf_pos = 0;
+  FILE *script = 0;
+  if (FLAG(s)) script = fopen(TT.s, "r");
 
   TT.il = xzalloc(sizeof(struct str_line));
   TT.il->data = xzalloc(80);
@@ -912,7 +916,15 @@ void vi_main(void)
 
   draw_page();
   for (;;) {
-    int key = scan_key(keybuf, -1);
+    int key = 0;
+    if (script) {
+      key = fgetc(script);
+      if (key == EOF) {
+        fclose(script);
+        script = 0;
+        key = scan_key(keybuf, -1);
+      }
+    } else key = scan_key(keybuf, -1);
 
     if (key == -1) goto cleanup_vi;
 
@@ -983,6 +995,7 @@ void vi_main(void)
           TT.il->len = 0;
           memset(TT.il->data, 0, TT.il->alloc);
           break;
+        case 0x0A:
         case 0x0D:
           if (run_ex_cmd(TT.il->data) == -1)
             goto cleanup_vi;
@@ -1018,6 +1031,7 @@ void vi_main(void)
             TT.il->len -= shrink;
           }
           break;
+        case 0x0A:
         case 0x0D:
           //insert newline
           //