Lua: add function `pandoc.mediabag.make_data_uri`.

The function takes a MIME type and raw data from which it creates an
RFC 2397 data URI.

Closes: #10876

1 files changed, 11 insertions, 0 deletions

diff --git a/pandoc-lua-engine/test/lua/module/pandoc-mediabag.lua b/pandoc-lua-engine/test/lua/module/pandoc-mediabag.lua
index f001bf8db..39653cccc 100644
--- a/pandoc-lua-engine/test/lua/module/pandoc-mediabag.lua
+++ b/pandoc-lua-engine/test/lua/module/pandoc-mediabag.lua
@@ -104,4 +104,15 @@ return {
     end),
   },
 
+  group 'make_data_uri' {
+    test('returns a data URI', function ()
+      local uri = mediabag.make_data_uri('text/plain', 'foo')
+      assert.are_equal(uri:sub(1,5), 'data:')
+    end),
+    test('URI specifies the given MIME type', function ()
+      local mimetype = 'text/plain'
+      local uri = mediabag.make_data_uri(mimetype, 'foo')
+      assert.are_equal(uri:sub(6, 5 + #mimetype), mimetype)
+    end),
+  }
 }