Add Lua test helpers

nvimrc

@@ -142,6 +142,12 @@ nnoremap <leader>s :split<cr>
 nnoremap <leader>rp "_dd<bar>P
 
 lua <<EOF
+function _G.dump(...)
+  local objects = vim.tbl_map(vim.inspect, {...})
+  print(unpack(objects))
+  return ...
+end
+
 function _G.insert_uuid()
   local uuid = vim.call("system", "uuidprint")
   vim.call("setreg", "u", uuid)
@@ -151,26 +157,108 @@ end
 vim.api.nvim_set_keymap("n", "<leader>uu", [[:lua _G.insert_uuid()<cr>]], {noremap = true, silent = true})
 vim.api.nvim_set_keymap("i", "<c-d><c-u>", [[<esc>:lua _G.insert_uuid()<cr>a]], {noremap = true, silent = true})
 
-_G.run_tests = function()
-  local bufnr = vim.call("bufnr", "%")
-  local filetype = vim.call("getbufvar", bufnr, "&filetype", "ERROR")
+_G._test_cmd_to_wins = {}
 
+_G._build_test_cmd = function()
+  local bufnr = vim.call("bufnr", "%")
+  local filetype = vim.call("getbufvar", bufnr, "&filetype")
   if filetype == "" then
-    print("cannot run tests for filetype:", filetype)
+    print("cannot build test command for filetype:", filetype)
+    return nil
+  end
+
+  local path = vim.call("expand", "%:p")
+
+  -- TODO: allow line number to be passed
+  -- TODO: check file exists before running command
+  if filetype == "ruby" then
+    if not path:find("_spec.rb") then
+      path = path:gsub("/app/", "/spec/"):gsub([[.rb$]], "_spec.rb")
+    end
+
+    return "bundle exec rspec --format=progress " .. path
+  elseif filetype == "go" then
+    return "go test " .. path:gsub("^(.*)/(.*go)$", "%1/...")
+  else
+    print("filetype not supported:", filetype)
+    return nil
+  end
+end
+
+_G.run_tests = function()
+  local cmd = _G._build_test_cmd()
+  if cmd == nil then
     return
   end
 
-  if filetype == "ruby" then
-    local path = vim.call("expand", "%:p")
-    local altpath = path:gsub("/app/", "/spec/"):gsub([[.rb$]], "_spec.rb")
-    vim.api.nvim_command([[10split +term\ bundle\ exec\ rspec\ ]] .. altpath)
+  vim.api.nvim_command([[silent up]])
+
+  local winid = _G._test_cmd_to_wins[cmd]
+  if winid == nil or not vim.api.nvim_win_is_valid(winid) or not vim.call("win_gotoid", winid) == -1 then
+    vim.api.nvim_command([[10split]])
+    winid = vim.call("win_getid")
+    _G._test_cmd_to_wins[cmd] = winid
+  end
+
+  local buf = vim.api.nvim_create_buf(false, true)
+  vim.api.nvim_buf_set_option(buf, "bufhidden", "delete")
+  vim.api.nvim_win_set_buf(winid, buf)
+
+  vim.call("termopen", cmd)
   vim.api.nvim_command([[normal! G]])
   vim.api.nvim_command([[wincmd p]])
+end
+
+_G.focus_tests = function()
+  local cmd = _G._build_test_cmd()
+  if cmd == nil then
+    return
+  end
+
+  local winid = _G._test_cmd_to_wins[cmd]
+  if winid == nil or not vim.api.nvim_win_is_valid(winid) then
+    return
+  end
+
+  vim.call("win_gotoid", winid)
+end
+
+_G.close_tests = function()
+  local current_winid = vim.api.nvim_get_current_win()
+  for _, winid in pairs(_G._test_cmd_to_wins) do
+    if current_winid == winid and vim.api.nvim_win_is_valid(winid) then
+      vim.api.nvim_win_close(winid, false)
       return
     end
   end
 
-vim.api.nvim_set_keymap("n", "<leader>rt", [[:lua _G.run_tests()<cr>]], {noremap = true, silent = true})
+  local cmd = _G._build_test_cmd()
+  if cmd == nil then
+    return
+  end
+
+  local winid = _G._test_cmd_to_wins[cmd]
+  if winid == nil or not vim.api.nvim_win_is_valid(winid) then
+    return
+  end
+
+  vim.api.nvim_win_close(winid, false)
+end
+
+_G.copy_test_cmd = function()
+  local cmd = _G._build_test_cmd()
+  if cmd == nil then
+    return
+  end
+
+  vim.call("setreg", "*", cmd)
+  print("Copied: " .. cmd)
+end
+
+vim.api.nvim_set_keymap("n", "<leader>cr", [[:lua _G.run_tests()<cr>]], {noremap = true, silent = true})
+vim.api.nvim_set_keymap("n", "<leader>cf", [[:lua _G.focus_tests()<cr>]], {noremap = true, silent = true})
+vim.api.nvim_set_keymap("n", "<leader>cq", [[:lua _G.close_tests()<cr>]], {noremap = true, silent = true})
+vim.api.nvim_set_keymap("n", "<leader>cc", [[:lua _G.copy_test_cmd()<cr>]], {noremap = true, silent = true})
 EOF
 
 " Git mappings