Skip tests, that are known to break on Github Actions

See actions/runner-images#11512

Signed-off-by: Christian Brabandt <[email protected]>

src/testdir/check.vim

@@ -291,4 +291,11 @@ func CheckAllOf(...)
   endfor
 endfunc
 
+" Check if running under Github Actions
+command CheckGithubActions call CheckGithubActions()
+func CheckGithubActions()
+  if expand('$GITHUB_ACTIONS') ==# 'true'
+    throw "Skipped: FIXME: this test doesn't work on Github Actions CI"
+  endif
+endfunc
 " vim: shiftwidth=2 sts=2 expandtab

src/testdir/test_terminal.vim

@@ -932,6 +932,11 @@ endfunc
 
 func Test_terminal_eof_arg()
   call CheckPython(s:python)
+  if has("win32")
+    " This tests started to fail on Github Actions Windows
+    " see: actions/runner-images#11512
+    CheckGithubActions
+  endif
   let g:test_is_flaky = 1
 
   call setline(1, ['print("hello")'])
@@ -949,6 +954,11 @@ func Test_terminal_eof_arg()
 endfunc
 
 func Test_terminal_eof_arg_win32_ctrl_z()
+  if has("win32")
+    " This tests started to fail on Github Actions Windows
+    " see: actions/runner-images#11512
+    CheckGithubActions
+  endif
   CheckMSWindows
   call CheckPython(s:python)
   let g:test_is_flaky = 1
@@ -962,6 +972,11 @@ endfunc
 
 func Test_terminal_duplicate_eof_arg()
   call CheckPython(s:python)
+  if has("win32")
+    " This tests started to fail on Github Actions Windows
+    " see: actions/runner-images#11512
+    CheckGithubActions
+  endif
   let g:test_is_flaky = 1
 
   " Check the last specified ++eof arg is used and does not leak memory.