From 766bd80fa8585fff92d75f7d9c799170d1c662a4 Mon Sep 17 00:00:00 2001
From: Mike Dalessio <mike.dalessio@gmail.com>
Date: Wed, 30 Dec 2020 14:00:12 -0500
Subject: [PATCH] fix: avoid emitting warnings when ruby is run with `-w`

I've also turned on warnings for this gem's tests, to make it more
obvious when this is happening in the future.

Without this fix, users will see repeated messages like this:

> source_file_formatter.rb:20: warning: instance variable @line_coverage not initialized
---
 .rspec                                                | 1 +
 lib/simplecov_json_formatter/source_file_formatter.rb | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)
 create mode 100644 .rspec

diff --git a/.rspec b/.rspec
new file mode 100644
index 0000000..372b5ac
--- /dev/null
+++ b/.rspec
@@ -0,0 +1 @@
+--warnings
diff --git a/lib/simplecov_json_formatter/source_file_formatter.rb b/lib/simplecov_json_formatter/source_file_formatter.rb
index 3564c79..6f44f52 100644
--- a/lib/simplecov_json_formatter/source_file_formatter.rb
+++ b/lib/simplecov_json_formatter/source_file_formatter.rb
@@ -4,6 +4,7 @@ module SimpleCovJSONFormatter
   class SourceFileFormatter
     def initialize(source_file)
       @source_file = source_file
+      @line_coverage = nil
     end
 
     def format
@@ -17,7 +18,7 @@ def format
     private
 
     def line_coverage
-      @line_coverage || {
+      @line_coverage ||= {
         lines: lines
       }
     end