Remove leading underscores in tag/field keys (#5)

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## v0.11.6
+
+- Remove leading underscores in tag and field keys.
+
 ## v0.11.5
 
 - Default `empty` value in fields must be quoted to be valid string field value.

lib/fluxter/packet.ex

@@ -54,8 +54,14 @@ defmodule Fluxter.Packet do
     |> to_string()
     |> String.trim()
     |> case do
-      "" -> "empty"
-      other -> to_string(other) |> escape(' ,')
+      "" ->
+        "empty"
+
+      other ->
+        other
+        |> to_string()
+        |> String.trim_leading("_")
+        |> escape(' ,')
     end
   end
 

test/fluxter_test.exs

@@ -148,6 +148,16 @@ defmodule FluxterTest do
       assert_receive {:echo, "foo,bar=equal\=baz value=0i"}
     end
 
+    test "tag key starting with underscore" do
+      TestFluxter.write("foo", [{:__under_bar, "baz"}], 0)
+      assert_receive {:echo, "foo,under_bar=baz value=0i"}
+    end
+
+    test "field key starting with underscore" do
+      TestFluxter.write("foo", [{:bar, "baz"}], [{:_under_qux, 16}])
+      assert_receive {:echo, "foo,bar=baz under_qux=16i"}
+    end
+
     test "nil tag" do
       TestFluxter.write("foo", [bar: "baz", qux: "baz", nil: nil], 0)
       assert_receive {:echo, "foo,bar=baz,nil=nil,qux=baz value=0i"}