patch 9.1.0877: tests: missing test for termdebug + decimal signs

Problem:  tests: missing test for termdebug + decimal signs
Solution: Add a termdebug test (Ubaldo Tiberi)

closes: #16081

Signed-off-by: Ubaldo Tiberi <ubaldo.tiberi@volvo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_termdebug.vim

@@ -179,6 +179,62 @@ func Test_termdebug_basic()
   %bw!
 endfunc
 
+func Test_termdebug_decimal_breakpoints()
+  let bin_name = 'XTD_decimal'
+  let src_name = bin_name .. '.c'
+  call s:generate_files(bin_name)
+
+  exe "edit " .. src_name
+
+  let g:termdebug_config = {}
+  let g:termdebug_config['sign_decimal'] = 1
+
+  exe "Termdebug " .. bin_name
+  call WaitForAssert({-> assert_true(get(g:, "termdebug_is_running", v:false))})
+  call WaitForAssert({-> assert_equal(3, winnr('$'))})
+  let gdb_buf = winbufnr(1)
+  wincmd b
+  Break 9
+  call term_wait(gdb_buf)
+  redraw!
+
+  let i = 2
+  while i <= 258
+    Break
+    call term_wait(gdb_buf)
+    if i == 2
+      call WaitForAssert({-> assert_equal(sign_getdefined('debugBreakpoint2.0')[0].text, '02')})
+    endif
+    if i == 10
+      call WaitForAssert({-> assert_equal(sign_getdefined('debugBreakpoint10.0')[0].text, '10')})
+    endif
+    if i == 168
+      call WaitForAssert({-> assert_equal(sign_getdefined('debugBreakpoint168.0')[0].text, '9+')})
+    endif
+    if i == 255
+      call WaitForAssert({-> assert_equal(sign_getdefined('debugBreakpoint255.0')[0].text, '9+')})
+    endif
+    if i == 256
+      call WaitForAssert({-> assert_equal(sign_getdefined('debugBreakpoint256.0')[0].text, '9+')})
+    endif
+    if i == 258
+      call WaitForAssert({-> assert_equal(sign_getdefined('debugBreakpoint258.0')[0].text, '9+')})
+    endif
+    let i += 1
+  endwhile
+
+  wincmd t
+  quit!
+  redraw!
+  call WaitForAssert({-> assert_equal(1, winnr('$'))})
+  call assert_equal([], sign_getplaced('', #{group: 'TermDebug'})[0].signs)
+
+  call s:cleanup_files(bin_name)
+  %bw!
+
+  unlet g:termdebug_config
+endfunc
+
 func Test_termdebug_tbreak()
   let g:test_is_flaky = 1
   let bin_name = 'XTD_tbreak'

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    877,
 /**/
     876,
 /**/