Add SimpleCov for test coverage reporting

Enabled via COVERAGE=1 bundle exec rspec so the default test run stays
free of the dependency overhead.

Author: MatheusRich

Gemfile

@@ -9,5 +9,6 @@ gem "irb"
 gem "rake", "~> 13.0"
 
 gem "rspec", "~> 3.0"
+gem "simplecov", require: false
 gem "standard"
 gem "webmock", "~> 3.0"

Gemfile.lock

@@ -15,6 +15,7 @@ GEM
       rexml
     date (3.5.1)
     diff-lcs (1.6.2)
+    docile (1.4.1)
     erb (6.0.3)
     hashdiff (1.2.1)
     io-console (0.8.2)
@@ -81,6 +82,12 @@ GEM
       rubocop (>= 1.75.0, < 2.0)
       rubocop-ast (>= 1.47.1, < 2.0)
     ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.13.2)
+    simplecov_json_formatter (0.1.4)
     standard (1.54.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
@@ -111,6 +118,7 @@ DEPENDENCIES
   irb
   rake (~> 13.0)
   rspec (~> 3.0)
+  simplecov
   standard
   upcheck!
   webmock (~> 3.0)
@@ -122,6 +130,7 @@ CHECKSUMS
   crack (1.0.1) sha256=ff4a10390cd31d66440b7524eb1841874db86201d5b70032028553130b6d4c7e
   date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0
   diff-lcs (1.6.2) sha256=9ae0d2cba7d4df3075fe8cd8602a8604993efc0dfa934cff568969efb1909962
+  docile (1.4.1) sha256=96159be799bfa73cdb721b840e9802126e4e03dfc26863db73647204c727f21e
   erb (6.0.3) sha256=e43685a8a0a0ea6a924871b2162e8953ef73147ce46b75b36d1f6774fd286e91
   hashdiff (1.2.1) sha256=9c079dbc513dfc8833ab59c0c2d8f230fa28499cc5efb4b8dd276cf931457cd1
   io-console (0.8.2) sha256=d6e3ae7a7cc7574f4b8893b4fca2162e57a825b223a177b7afa236c5ef9814cc
@@ -152,6 +161,9 @@ CHECKSUMS
   rubocop-ast (1.49.1) sha256=4412f3ee70f6fe4546cc489548e0f6fcf76cafcfa80fa03af67098ffed755035
   rubocop-performance (1.26.1) sha256=cd19b936ff196df85829d264b522fd4f98b6c89ad271fa52744a8c11b8f71834
   ruby-progressbar (1.13.0) sha256=80fc9c47a9b640d6834e0dc7b3c94c9df37f08cb072b7761e4a71e22cff29b33
+  simplecov (0.22.0) sha256=fe2622c7834ff23b98066bb0a854284b2729a569ac659f82621fc22ef36213a5
+  simplecov-html (0.13.2) sha256=bd0b8e54e7c2d7685927e8d6286466359b6f16b18cb0df47b508e8d73c777246
+  simplecov_json_formatter (0.1.4) sha256=529418fbe8de1713ac2b2d612aa3daa56d316975d307244399fa4838c601b428
   standard (1.54.0) sha256=7a4b08f83d9893083c8f03bc486f0feeb6a84d48233b40829c03ef4767ea0100
   standard-custom (1.0.2) sha256=424adc84179a074f1a2a309bb9cf7cd6bfdb2b6541f20c6bf9436c0ba22a652b
   standard-performance (1.9.0) sha256=49483d31be448292951d80e5e67cdcb576c2502103c7b40aec6f1b6e9c88e3f2

spec/spec_helper.rb

@@ -1,5 +1,13 @@
 # frozen_string_literal: true
 
+if ENV["COVERAGE"]
+  require "simplecov"
+  SimpleCov.start do
+    enable_coverage :branch
+    add_filter "/spec/"
+  end
+end
+
 require "upcheck"
 require "webmock/rspec"
 require_relative "support/fixtures"