patch 8.1.0832: confirm() is not tested
Problem: confirm() is not tested.
Solution: Add a test. (Dominique Pelle, closes #3868)
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 3d81048..ceb8486 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -1153,3 +1153,58 @@
call delete('Xfuncexists')
delfunc ExistingFunction
endfunc
+
+" Test confirm({msg} [, {choices} [, {default} [, {type}]]])
+func Test_confirm()
+ if !has('unix') || has('gui_running')
+ return
+ endif
+
+ call feedkeys('o', 'L')
+ let a = confirm('Press O to proceed')
+ call assert_equal(1, a)
+
+ call feedkeys('y', 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No")
+ call assert_equal(1, a)
+
+ call feedkeys('n', 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No")
+ call assert_equal(2, a)
+
+ " confirm() should return 0 when pressing CTRL-C.
+ call feedkeys("\<C-c>", 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No")
+ call assert_equal(0, a)
+
+ " <Esc> requires another character to avoid it being seen as the start of an
+ " escape sequence. Zero should be harmless.
+ call feedkeys("\<Esc>0", 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No")
+ call assert_equal(0, a)
+
+ " Default choice is returned when pressing <CR>.
+ call feedkeys("\<CR>", 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No")
+ call assert_equal(1, a)
+
+ call feedkeys("\<CR>", 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No", 2)
+ call assert_equal(2, a)
+
+ call feedkeys("\<CR>", 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No", 0)
+ call assert_equal(0, a)
+
+ " Test with the {type} 4th argument
+ for type in ['Error', 'Question', 'Info', 'Warning', 'Generic']
+ call feedkeys('y', 'L')
+ let a = confirm('Are you sure?', "&Yes\n&No\n", 1, type)
+ call assert_equal(1, a)
+ endfor
+
+ call assert_fails('call confirm([])', 'E730:')
+ call assert_fails('call confirm("Are you sure?", [])', 'E730:')
+ call assert_fails('call confirm("Are you sure?", "&Yes\n&No\n", [])', 'E745:')
+ call assert_fails('call confirm("Are you sure?", "&Yes\n&No\n", 0, [])', 'E730:')
+endfunc