Change uri_to_fname to not convert non-file URIs (#12351)

* Change uri_to_fname to not convert non-file URIs

A URI with a scheme other than file doesn't have a local file path.

* fixup! Change uri_to_fname to not convert non-file URIs

* fixup! fixup! Change uri_to_fname to not convert non-file URIs

1 files changed, 23 insertions, 0 deletions

diff --git a/test/functional/lua/uri_spec.lua b/test/functional/lua/uri_spec.lua
index a3b8e685e1..f782769935 100644
--- a/test/functional/lua/uri_spec.lua
+++ b/test/functional/lua/uri_spec.lua
@@ -112,6 +112,29 @@ describe('URI methods', function()
         eq('C:\\xy\\åäö\\ɧ\\汉语\\↥\\🤦\\🦄\\å\\بِيَّ.txt', exec_lua(test_case))
       end)
     end)
+
+    describe('decode non-file URI', function()
+      it('uri_to_fname returns non-file URI unchanged', function()
+        eq('jdt1.23+x-z://content/%5C/', exec_lua [[
+          return vim.uri_to_fname('jdt1.23+x-z://content/%5C/')
+        ]])
+      end)
+
+      it('uri_to_fname returns non-file upper-case scheme URI unchanged', function()
+        eq('JDT://content/%5C/', exec_lua [[
+          return vim.uri_to_fname('JDT://content/%5C/')
+        ]])
+      end)
+    end)
+
+    describe('decode URI without scheme', function()
+      it('fails because URI must have a scheme', function()
+        eq(false, exec_lua [[
+          return pcall(vim.uri_to_fname, 'not_an_uri.txt')
+        ]])
+      end)
+    end)
+
   end)
 
   describe('uri to bufnr', function()