1 files changed, 94 insertions, 0 deletions
diff --git a/test/functional/eval/match_functions_spec.lua b/test/functional/eval/match_functions_spec.lua
index 3150d89f62..7989b22b5e 100644
--- a/test/functional/eval/match_functions_spec.lua
+++ b/test/functional/eval/match_functions_spec.lua
@@ -1,9 +1,11 @@
 local helpers = require('test.functional.helpers')(after_each)
+local Screen = require('test.functional.ui.screen')
 
 local eq = helpers.eq
 local clear = helpers.clear
 local funcs = helpers.funcs
 local command = helpers.command
+local exc_exec = helpers.exc_exec
 
 before_each(clear)
 
@@ -59,3 +61,95 @@ describe('matchadd()', function()
     }}, funcs.getmatches())
   end)
 end)
+
+describe('matchaddpos()', function()
+  it('errors out on invalid input', function()
+    command('hi clear PreProc')
+    eq('Vim(let):E5030: Empty list at position 0',
+       exc_exec('let val = matchaddpos("PreProc", [[]])'))
+    eq('Vim(let):E5030: Empty list at position 1',
+       exc_exec('let val = matchaddpos("PreProc", [1, v:_null_list])'))
+    eq('Vim(let):E5031: List or number required at position 1',
+       exc_exec('let val = matchaddpos("PreProc", [1, v:_null_dict])'))
+  end)
+  it('works with 0 lnum', function()
+    command('hi clear PreProc')
+    eq(4, funcs.matchaddpos('PreProc', {1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+    funcs.matchdelete(4)
+    eq(4, funcs.matchaddpos('PreProc', {{0}, 1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+    funcs.matchdelete(4)
+    eq(4, funcs.matchaddpos('PreProc', {0, 1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+  end)
+  it('works with negative numbers', function()
+    command('hi clear PreProc')
+    eq(4, funcs.matchaddpos('PreProc', {-10, 1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+    funcs.matchdelete(4)
+    eq(4, funcs.matchaddpos('PreProc', {{-10}, 1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+    funcs.matchdelete(4)
+    eq(4, funcs.matchaddpos('PreProc', {{2, -1}, 1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+    funcs.matchdelete(4)
+    eq(4, funcs.matchaddpos('PreProc', {{2, 0, -1}, 1}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+  end)
+  it('works with zero length', function()
+    local screen = Screen.new(40, 5)
+    screen:attach()
+    funcs.setline(1, 'abcdef')
+    command('hi PreProc guifg=Red')
+    eq(4, funcs.matchaddpos('PreProc', {{1, 2, 0}}, 3, 4))
+    eq({{
+      group='PreProc',
+      pos1 = {1, 2, 0},
+      priority=3,
+      id=4,
+    }}, funcs.getmatches())
+    screen:expect([[
+      ^a{1:b}cdef                                  |
+      {2:~                                       }|
+      {2:~                                       }|
+      {2:~                                       }|
+                                              |
+    ]], {[1] = {foreground = Screen.colors.Red}, [2] = {bold = true, foreground = Screen.colors.Blue1}})
+  end)
+end)