feat: Setting filetype to org will treat file as an org file

Fixes #808

lua/orgmode/files/file.lua

@@ -55,20 +55,21 @@ end
 ---Load the file
 ---@return OrgPromise<OrgFile | false>
 function OrgFile.load(filename)
-  if not utils.is_org_file(filename) then
-    return Promise.resolve(false)
-  end
   local bufnr = vim.fn.bufnr(filename) or -1
 
-  if bufnr > -1 and vim.api.nvim_buf_is_loaded(bufnr) then
+  if
+    bufnr > -1
+    and vim.api.nvim_buf_is_loaded(bufnr)
+    and vim.api.nvim_get_option_value('filetype', { buf = bufnr }) == 'org'
+  then
     return Promise.resolve(OrgFile:new({
       filename = filename,
       lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false),
       bufnr = bufnr,
     }))
   end
 
-  if not vim.loop.fs_stat(filename) then
+  if not vim.loop.fs_stat(filename) or not utils.is_org_file(filename) then
     return Promise.resolve(false)
   end
 

tests/plenary/init_spec.lua

@@ -1,5 +1,5 @@
-local helpers = require('tests.plenary.helpers')
 local orgmode = require('orgmode')
+local Date = require('orgmode.objects.date')
 
 describe('Init', function()
   local org = orgmode.setup({
@@ -10,6 +10,7 @@ describe('Init', function()
   local todo_archive_file = vim.fn.getcwd() .. '/tests/plenary/fixtures/todo.org_archive'
   local refile_file = vim.fn.getcwd() .. '/tests/plenary/fixtures/refile.org'
   local txt_file = vim.fn.getcwd() .. '/tests/plenary/fixtures/text_notes.txt'
+
   it('should load and parse files from folder', function()
     assert.is.Nil(rawget(org, 'files'))
     assert.is.Nil(rawget(org, 'agenda'))
@@ -53,4 +54,23 @@ describe('Init', function()
     -- Existing file in path not appended to paths
     assert.are.same({ vim.fn.getcwd() .. '/tests/plenary/fixtures/*', fname }, org.files.paths)
   end)
+
+  it('should load a file as org file if it has correct filetype', function()
+    local fname = vim.fn.resolve(vim.fn.tempname() .. '.txt')
+
+    -- Behaves as text file
+    vim.fn.writefile({ '* TODO Test' }, fname)
+    vim.cmd('edit ' .. fname)
+    assert.are.same('text', vim.api.nvim_get_option_value('filetype', { buf = vim.api.nvim_get_current_buf() }))
+    vim.cmd('norm >>')
+    assert.are.same({ '        * TODO Test' }, vim.api.nvim_buf_get_lines(0, 0, -1, false))
+    vim.cmd('bw!')
+
+    -- Behaves as org file
+    vim.fn.writefile({ '* TODO Test' }, fname)
+    vim.cmd('edit ' .. fname)
+    vim.cmd('set filetype=org')
+    vim.cmd('norm >>')
+    assert.are.same({ '** TODO Test' }, vim.api.nvim_buf_get_lines(0, 0, -1, false))
+  end)
 end)