Fix SimpleCov coverage results for multiple invocations from same build test

.gitignore

@@ -7,5 +7,5 @@
 /gen/
 /large_project/
 /pkg/
-/test/
+/test_run/
 /yard/

Gemfile

@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem "base64"
 gem "rspec"
 gem "rake"
-gem "simplecov", "~> 0.15.0"
+gem "simplecov"
 gem "openssl"
 if RbConfig::CONFIG["host"]["msys"]
   gem "json", "2.1.0"

Gemfile.lock

@@ -4,7 +4,7 @@ GEM
     base64 (0.3.0)
     date (3.5.1)
     diff-lcs (1.6.2)
-    docile (1.1.5)
+    docile (1.4.1)
     erb (6.0.1)
     json (2.18.0)
     openssl (4.0.0)
@@ -30,11 +30,12 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.6)
-    simplecov (0.15.1)
-      docile (~> 1.1.0)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-    simplecov-html (0.10.2)
+    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)
     stringio (3.2.0)
     syntax (1.2.2)
     tsort (0.2.0)
@@ -52,7 +53,7 @@ DEPENDENCIES
   rdoc
   redcarpet
   rspec
-  simplecov (~> 0.15.0)
+  simplecov
   syntax
   yard
 

Rakefile.rb

@@ -8,8 +8,10 @@ end
 require "rspec/core/rake_task"
 require "rake/clean"
 require "fileutils"
+require "simplecov"
+require "stringio"
 
-CLEAN.include %w[build_test_run .yardoc yard coverage test]
+CLEAN.include %w[build_test_run .yardoc yard coverage test_run]
 CLOBBER.include %w[dist gen large_project pkg]
 
 task :build_dist do
@@ -19,24 +21,42 @@ end
 RSpec::Core::RakeTask.new(:spec, :example_string) do |task, args|
   ENV["specs"] = "1"
   if args.example_string
-    ENV["partial_specs"] = "1"
     task.rspec_opts = %W[-e "#{args.example_string}" -f documentation]
   end
 end
-task :spec => :build_dist
 task :spec do
   ENV.delete("specs")
 end
+task :spec => :build_tests
+task :spec do
+  unless ENV["rscons_dist_specs"]
+    original_stdout = $stdout
+    sio = StringIO.new
+    $stdout = sio
+    SimpleCov.collate Dir["coverage/.resultset.json", "coverage/bt*/.resultset.json"]
+    $stdout = original_stdout
+    sio.string.lines.each do |line|
+      $stdout.write(line) unless line =~ /Coverage report generated for/
+    end
+  end
+end
+
+task :build_tests do |task, args|
+  ENV["specs"] = "1"
+  sh "ruby -Ilib build_tests/build_tests.rb"
+  ENV.delete("specs")
+end
 
 # dspec task is useful to test the distributable release script, but is not
 # useful for coverage information.
 desc "Dist Specs"
 task :dspec, [:example_string] => :build_dist do |task, args|
-  FileUtils.rm_rf("test")
-  FileUtils.mkdir_p("test")
-  FileUtils.cp("dist/rscons", "test/rscons.rb")
+  FileUtils.rm_rf("test_run")
+  FileUtils.mkdir_p("test_run")
+  FileUtils.cp("dist/rscons", "test_run/rscons.rb")
   ENV["rscons_dist_specs"] = "1"
   Rake::Task["spec"].execute(args)
+  Rake::Task["build_tests"].execute(args)
   ENV.delete("rscons_dist_specs")
   FileUtils.rm_f(Dir.glob(".rscons-*"))
 end

spec/spec_helper.rb

@@ -1,8 +1,12 @@
 if ENV["rscons_dist_specs"]
-  require_relative "../test/rscons"
+  require_relative "../test_run/rscons"
 else
   require "simplecov"
 
+  class MyFormatter
+    def format(*args)
+    end
+  end
   SimpleCov.start do
     add_filter "/spec/"
     add_filter "/.bundle/"
@@ -11,9 +15,10 @@ else
     else
       command_name "RSpec"
     end
-    add_filter "test/rscons.rb"
+    add_filter "test_run/rscons.rb"
     project_name "Rscons"
     merge_timeout 3600
+    formatter(MyFormatter)
   end
 
   require "rscons"