From 297a6e6c1607807e5773552ebc7160828594f4ee Mon Sep 17 00:00:00 2001
From: Aaron Kyungmin Seo <aaron.km.seo@gmail.com>
Date: Thu, 16 Nov 2023 14:39:18 -0800
Subject: [PATCH] Move export prometheus_text_format:escape_label_value outside
 of TEST def (#158)

* Move export prometheus_text_format:escape_label_value outside of TEST def

* update escape_label_value spec
---
 src/formats/prometheus_text_format.erl | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/formats/prometheus_text_format.erl b/src/formats/prometheus_text_format.erl
index d8fec36d..da407d15 100644
--- a/src/formats/prometheus_text_format.erl
+++ b/src/formats/prometheus_text_format.erl
@@ -22,11 +22,12 @@
 -export([content_type/0,
          format/0,
          format/1,
-         render_labels/1]).
+         render_labels/1,
+         escape_label_value/1
+        ]).
 
 -ifdef(TEST).
 -export([escape_metric_help/1,
-         escape_label_value/1,
          emit_mf_prologue/2,
          emit_mf_metrics/2
         ]).
@@ -76,6 +77,16 @@ format(Registry) ->
   ok = file:close(Fd),
   Str.
 
+-spec escape_label_value(binary() | iolist()) -> binary()
+                      ; (undefined) -> no_return().
+%% @doc
+%% Escapes the backslash (\), double-quote ("), and line feed (\n) characters
+%% @end
+escape_label_value(LValue) when is_list(LValue); is_binary(LValue) ->
+  escape_string(fun escape_label_char/1, LValue);
+escape_label_value(Value) ->
+  erlang:error({wtf, Value}).
+
 %%====================================================================
 %% Private Parts
 %%====================================================================
@@ -227,13 +238,6 @@ bound_to_label_value(Bound) when is_float(Bound) ->
 bound_to_label_value(infinity) ->
   "+Inf".
 
--spec escape_label_value(binary() | iolist() | undefined) -> binary().
-%% @private
-escape_label_value(LValue) when is_list(LValue); is_binary(LValue) ->
-  escape_string(fun escape_label_char/1, LValue);
-escape_label_value(Value) ->
-  erlang:error({wtf, Value}).
-
 %% @private
 escape_label_char($\\ = X) ->
   <<X, X>>;