fix(mapset): remove existing abbreviation of same lhs (#20320)

1 files changed, 20 insertions, 2 deletions

diff --git a/test/functional/vimscript/map_functions_spec.lua b/test/functional/vimscript/map_functions_spec.lua
index 96b86d053e..ed1863754a 100644
--- a/test/functional/vimscript/map_functions_spec.lua
+++ b/test/functional/vimscript/map_functions_spec.lua
@@ -12,6 +12,7 @@ local meths = helpers.meths
 local nvim = helpers.nvim
 local source = helpers.source
 local command = helpers.command
+local exec_capture = helpers.exec_capture
 local pcall_err = helpers.pcall_err
 
 describe('maparg()', function()
@@ -178,8 +179,9 @@ describe('mapset()', function()
     eq('\nn  lhs           rhs\n                 map description',
        helpers.exec_capture("nmap lhs"))
     local mapargs = funcs.maparg('lhs', 'n', false, true)
-    meths.del_keymap('n', 'lhs')
-    eq('\nNo mapping found', helpers.exec_capture("nmap lhs"))
+    meths.set_keymap('n', 'lhs', 'rhs', {desc = 'MAP DESCRIPTION'})
+    eq('\nn  lhs           rhs\n                 MAP DESCRIPTION',
+       helpers.exec_capture("nmap lhs"))
     funcs.mapset('n', false, mapargs)
     eq('\nn  lhs           rhs\n                 map description',
        helpers.exec_capture("nmap lhs"))
@@ -198,6 +200,22 @@ describe('mapset()', function()
     expect('<<lt><')
   end)
 
+  it('replaces an abbreviation of the same lhs #20320', function()
+    command('inoreabbr foo bar')
+    eq('\ni  foo         * bar', exec_capture('iabbr foo'))
+    feed('ifoo ')
+    expect('bar ')
+    local mapargs = funcs.maparg('foo', 'i', true, true)
+    command('inoreabbr foo BAR')
+    eq('\ni  foo         * BAR', exec_capture('iabbr foo'))
+    feed('foo ')
+    expect('bar BAR ')
+    funcs.mapset('i', true, mapargs)
+    eq('\ni  foo         * bar', exec_capture('iabbr foo'))
+    feed('foo<Esc>')
+    expect('bar BAR bar')
+  end)
+
   it('can restore Lua callback from the dict returned by maparg()', function()
     eq(0, exec_lua([[
       GlobalCount = 0