3 files changed, 27 insertions, 5 deletions
diff --git a/test/functional/lua/deprecated_spec.lua b/test/functional/lua/deprecated_spec.lua
new file mode 100644
index 0000000000..fee34336cc
--- /dev/null
+++ b/test/functional/lua/deprecated_spec.lua
@@ -0,0 +1,22 @@
+local t = require('test.testutil')
+local n = require('test.functional.testnvim')()
+
+local clear = n.clear
+local exec_lua = n.exec_lua
+local eq = t.eq
+
+describe('deprecated lua code', function()
+  before_each(clear)
+
+  describe('vim.treesitter.get_parser()', function()
+    it('returns nil for versions >= 0.12', function()
+      local result = exec_lua(function()
+        if vim.version.ge(vim.version(), '0.12') then
+          return vim.treesitter.get_parser(0, 'borklang')
+        end
+        return nil
+      end)
+      eq(nil, result)
+    end)
+  end)
+end)
diff --git a/test/functional/treesitter/language_spec.lua b/test/functional/treesitter/language_spec.lua
index f8191d603a..3947ab23b2 100644
--- a/test/functional/treesitter/language_spec.lua
+++ b/test/functional/treesitter/language_spec.lua
@@ -16,11 +16,11 @@ describe('treesitter language API', function()
   -- error tests not requiring a parser library
   it('handles missing language', function()
     eq(
-      '.../treesitter.lua:0: Parser not found.',
+      '.../treesitter.lua:0: Parser could not be created for buffer 1 and language "borklang"',
       pcall_err(exec_lua, "parser = vim.treesitter.get_parser(0, 'borklang')")
     )
 
-    eq(NIL, exec_lua("return vim.treesitter._get_parser(0, 'borklang')"))
+    eq(NIL, exec_lua("return vim.treesitter.get_parser(0, 'borklang', { error = false })"))
 
     -- actual message depends on platform
     matches(
@@ -108,10 +108,10 @@ describe('treesitter language API', function()
       command('set filetype=borklang')
       -- Should throw an error when filetype changes to borklang
       eq(
-        '.../treesitter.lua:0: Parser not found.',
+        '.../treesitter.lua:0: Parser could not be created for buffer 1 and language "borklang"',
         pcall_err(exec_lua, "new_parser = vim.treesitter.get_parser(0, 'borklang')")
       )
-      eq(NIL, exec_lua("return vim.treesitter._get_parser(0, 'borklang')"))
+      eq(NIL, exec_lua("return vim.treesitter.get_parser(0, 'borklang', { error = false })"))
     end
   )
 
diff --git a/test/functional/treesitter/parser_spec.lua b/test/functional/treesitter/parser_spec.lua
index 92379a71bd..c8829f4785 100644
--- a/test/functional/treesitter/parser_spec.lua
+++ b/test/functional/treesitter/parser_spec.lua
@@ -135,7 +135,7 @@ void ui_refresh(void)
     insert(test_text)
 
     eq(
-      '.../treesitter.lua:0: Parser not found.',
+      '.../treesitter.lua:0: Parser not found for buffer 1: language could not be determined',
       pcall_err(exec_lua, 'vim.treesitter.get_parser(0)')
     )