Fix some json tests

processor/processor.go

@@ -129,9 +129,9 @@ func InitLuaHelpers(L *lua.LState) error {
 -- Custom Lua helpers for math operations
 function min(a, b) return math.min(a, b) end
 function max(a, b) return math.max(a, b) end
-function round(x, n) 
+function round(x, n)
 	if n == nil then n = 0 end
-	return math.floor(x * 10^n + 0.5) / 10^n 
+	return math.floor(x * 10^n + 0.5) / 10^n
 end
 function floor(x) return math.floor(x) end
 function ceil(x) return math.ceil(x) end
@@ -172,8 +172,7 @@ func LimitString(s string, maxLen int) string {
 	return s[:maxLen-3] + "..."
 }
 
-// BuildLuaScript prepares a Lua expression from shorthand notation
-func BuildLuaScript(luaExpr string) string {
+func PrependLuaAssignment(luaExpr string) string {
 	// Auto-prepend v1 for expressions starting with operators
 	if strings.HasPrefix(luaExpr, "*") ||
 		strings.HasPrefix(luaExpr, "/") ||
@@ -191,6 +190,12 @@ func BuildLuaScript(luaExpr string) string {
 	if !strings.Contains(luaExpr, "=") {
 		luaExpr = "v1 = " + luaExpr
 	}
+	return luaExpr
+}
+
+// BuildLuaScript prepares a Lua expression from shorthand notation
+func BuildLuaScript(luaExpr string) string {
+	luaExpr = PrependLuaAssignment(luaExpr)
 
 	// This allows the user to specify whether or not they modified a value
 	// If they do nothing we assume they did modify (no return at all)