Add test to check if `rubocop-cask` version is is outdated.

4 files changed, 23 insertions, 4 deletions

diff --git a/Library/Homebrew/cask/spec/cask/cli/style_spec.rb b/Library/Homebrew/cask/spec/cask/cli/style_spec.rb
index b0d34576a..106bfbb44 100644
--- a/Library/Homebrew/cask/spec/cask/cli/style_spec.rb
+++ b/Library/Homebrew/cask/spec/cask/cli/style_spec.rb
@@ -1,4 +1,6 @@
 require "English"
+require "open3"
+require "rubygems"
 
 describe Hbc::CLI::Style do
   let(:args) { [] }
@@ -77,6 +79,20 @@ describe Hbc::CLI::Style do
         expect { subject }.to raise_error(Hbc::CaskError)
       end
     end
+
+    context "version" do
+      it "matches `HOMEBREW_RUBOCOP_VERSION`" do
+        stdout, status = Open3.capture2("gem", "dependency", "rubocop-cask", "--version", HOMEBREW_RUBOCOP_CASK_VERSION, "--pipe", "--remote")
+
+        expect(status).to be_a_success
+
+        requirement = Gem::Requirement.new(stdout.scan(/rubocop --version '(.*)'/).flatten.first)
+        version = Gem::Version.new(HOMEBREW_RUBOCOP_VERSION)
+
+        expect(requirement).not_to be_none
+        expect(requirement).to be_satisfied_by(version)
+      end
+    end
   end
 
   describe "#cask_paths" do
diff --git a/Library/Homebrew/config.rb b/Library/Homebrew/config.rb
index 9831b0af8..30b7bc6c9 100644
--- a/Library/Homebrew/config.rb
+++ b/Library/Homebrew/config.rb
@@ -2,6 +2,8 @@ unless ENV["HOMEBREW_BREW_FILE"]
   raise "HOMEBREW_BREW_FILE was not exported! Please call bin/brew directly!"
 end
 
+require "constants"
+
 # Path to `bin/brew` main executable in HOMEBREW_PREFIX
 HOMEBREW_BREW_FILE = Pathname.new(ENV["HOMEBREW_BREW_FILE"])
 
@@ -48,7 +50,3 @@ end
 
 # Load path used by standalone scripts to access the Homebrew code base
 HOMEBREW_LOAD_PATH = HOMEBREW_LIBRARY_PATH
-
-# RuboCop version used for `brew style` and `brew cask style`
-HOMEBREW_RUBOCOP_VERSION = "0.47.1".freeze
-HOMEBREW_RUBOCOP_CASK_VERSION = "~> 0.10.6".freeze # has to be updated when RuboCop version changes
diff --git a/Library/Homebrew/constants.rb b/Library/Homebrew/constants.rb
new file mode 100644
index 000000000..033a24dd0
--- /dev/null
+++ b/Library/Homebrew/constants.rb
@@ -0,0 +1,3 @@
+# RuboCop version used for `brew style` and `brew cask style`
+HOMEBREW_RUBOCOP_VERSION = "0.47.1".freeze
+HOMEBREW_RUBOCOP_CASK_VERSION = "~> 0.10.6".freeze # has to be updated when RuboCop version changes
diff --git a/Library/Homebrew/test/support/lib/config.rb b/Library/Homebrew/test/support/lib/config.rb
index fb5c210fe..3a0a76722 100644
--- a/Library/Homebrew/test/support/lib/config.rb
+++ b/Library/Homebrew/test/support/lib/config.rb
@@ -2,6 +2,8 @@ unless ENV["HOMEBREW_BREW_FILE"]
   raise "HOMEBREW_BREW_FILE was not exported! Please call bin/brew directly!"
 end
 
+require "constants"
+
 require "tmpdir"
 require "pathname"