2 files changed, 36 insertions, 0 deletions
diff --git a/test/functional/legacy/assert_spec.lua b/test/functional/legacy/assert_spec.lua
index 63699387c1..ab6be0ecb7 100644
--- a/test/functional/legacy/assert_spec.lua
+++ b/test/functional/legacy/assert_spec.lua
@@ -141,6 +141,18 @@ describe('assert function:', function()
         tmpname_two .. " line 1: 'file two'",
       })
     end)
+
+    it('is reset to a list by assert functions', function()
+      source([[
+        let save_verrors = v:errors
+        let v:['errors'] = {'foo': 3}
+        call assert_equal('yes', 'no')
+        let verrors = v:errors
+        let v:errors = save_verrors
+        call assert_equal(type([]), type(verrors))
+      ]])
+      expected_empty()
+    end)
   end)
 
   -- assert_fails({cmd}, [, {error}])
diff --git a/test/functional/legacy/function_sort_spec.lua b/test/functional/legacy/function_sort_spec.lua
index 9083911021..b274aee94b 100644
--- a/test/functional/legacy/function_sort_spec.lua
+++ b/test/functional/legacy/function_sort_spec.lua
@@ -2,6 +2,9 @@ local helpers = require('test.functional.helpers')
 local clear = helpers.clear
 local eq = helpers.eq
 local eval = helpers.eval
+local execute = helpers.execute
+local exc_exec = helpers.exc_exec
+local neq = helpers.neq
 
 describe('sort', function()
   before_each(clear)
@@ -26,4 +29,25 @@ describe('sort', function()
   it('numbers compared as float', function()
     eq({0.28, 3, 13.5}, eval("sort([13.5, 0.28, 3], 'f')"))
   end)
+
+  it('ability to call sort() from a compare function', function()
+    execute('func Compare1(a, b) abort')
+    execute([[call sort(range(3), 'Compare2')]])
+    execute('return a:a - a:b')
+    execute('endfunc')
+
+    execute('func Compare2(a, b) abort')
+    execute('return a:a - a:b')
+    execute('endfunc')
+    eq({1, 3, 5}, eval("sort([3, 1, 5], 'Compare1')"))
+  end)
+
+  it('default sort', function()
+    -- docs say omitted, empty or zero argument sorts on string representation
+    eq({'2', 'A', 'AA', 'a', 1, 3.3}, eval('sort([3.3, 1, "2", "A", "a", "AA"])'))
+    eq({'2', 'A', 'AA', 'a', 1, 3.3}, eval([[sort([3.3, 1, "2", "A", "a", "AA"], '')]]))
+    eq({'2', 'A', 'AA', 'a', 1, 3.3}, eval('sort([3.3, 1, "2", "A", "a", "AA"], 0)'))
+    eq({'2', 'A', 'a', 'AA', 1, 3.3}, eval('sort([3.3, 1, "2", "A", "a", "AA"], 1)'))
+    neq(exc_exec('call sort([3.3, 1, "2"], 3)'):find('E474:'), nil)
+  end)
 end)