unindent in specs

spec/unindent.lua

@@ -0,0 +1,39 @@
+-- Unindenting transforms a string like this:
+-- [[
+--     {
+--       foo = 1,
+--       bar = 2
+--     }
+-- ]]
+--
+-- Into the same one without indentation, nor start/end newlines
+--
+-- [[{
+--   foo = 1,
+--   bar = 2
+-- }]]
+--
+-- This makes the strings look and read better in the tests
+--
+
+local getIndentPreffix = function(str)
+  local level = math.huge
+  local minPreffix = ""
+  local len
+  for preffix in str:gmatch("\n( +)") do
+    len = #preffix
+    if len < level then
+      level = len
+      minPreffix = preffix
+    end
+  end
+  return minPreffix
+end
+
+local unindent = function(str)
+  str = str:gsub(" +$", ""):gsub("^ +", "") -- remove spaces at start and end
+  local preffix = getIndentPreffix(str)
+  return (str:gsub("\n" .. preffix, "\n"):gsub("\n$", ""))
+end
+
+return unindent