Refactor `CLI::Style`.

Library/Homebrew/cask/lib/hbc/cli/style.rb

@@ -8,19 +8,24 @@ module Hbc
       end
 
       def self.run(*args)
-        retval = new(args).run
-        raise CaskError, "style check failed" unless retval
+        new(*args).run
       end
 
       attr_reader :args
-      def initialize(args)
-        @args = args
+      def initialize(*args)
+        @cask_tokens = self.class.cask_tokens_from(args)
+        @fix = args.any? { |arg| arg =~ /^--(fix|(auto-?)?correct)$/ }
+      end
+
+      def fix?
+        @fix
       end
 
       def run
         install_rubocop
         system "rubocop", *rubocop_args, "--", *cask_paths
-        $CHILD_STATUS.success?
+        raise CaskError, "style check failed" unless $CHILD_STATUS.success?
+        true
       end
 
       def install_rubocop
@@ -34,19 +39,15 @@ module Hbc
       end
 
       def cask_paths
-        @cask_paths ||= if cask_tokens.empty?
+        @cask_paths ||= if @cask_tokens.empty?
           Hbc.all_tapped_cask_dirs
-        elsif cask_tokens.any? { |file| File.exist?(file) }
-          cask_tokens
+        elsif @cask_tokens.any? { |file| File.exist?(file) }
+          @cask_tokens
         else
-          cask_tokens.map { |token| CaskLoader.path(token) }
+          @cask_tokens.map { |token| CaskLoader.path(token) }
         end
       end
 
-      def cask_tokens
-        @cask_tokens ||= self.class.cask_tokens_from(args)
-      end
-
       def rubocop_args
         fix? ? autocorrect_args : default_args
       end
@@ -63,10 +64,6 @@ module Hbc
       def autocorrect_args
         default_args + ["--auto-correct"]
       end
-
-      def fix?
-        args.any? { |arg| arg =~ /--(fix|(auto-?)?correct)/ }
-      end
     end
   end
 end

Library/Homebrew/test/cask/cli/style_spec.rb

@@ -4,37 +4,12 @@ require "rubygems"
 
 describe Hbc::CLI::Style, :cask do
   let(:args) { [] }
-  let(:cli) { described_class.new(args) }
+  let(:cli) { described_class.new(*args) }
 
   around do |example|
     shutup { example.run }
   end
 
-  describe ".run" do
-    subject { described_class.run(args) }
-
-    before do
-      allow(described_class).to receive(:new).and_return(cli)
-      allow(cli).to receive(:run).and_return(retval)
-    end
-
-    context "when rubocop succeeds" do
-      let(:retval) { true }
-
-      it "exits successfully" do
-        subject
-      end
-    end
-
-    context "when rubocop fails" do
-      let(:retval) { false }
-
-      it "raises an exception" do
-        expect { subject }.to raise_error(Hbc::CaskError)
-      end
-    end
-  end
-
   describe "#run" do
     subject { cli.run }
 
@@ -53,7 +28,10 @@ describe Hbc::CLI::Style, :cask do
 
     context "when rubocop fails" do
       let(:success) { false }
-      it { is_expected.to be_falsey }
+
+      it "raises an error" do
+        expect { subject }.to raise_error(Hbc::CaskError)
+      end
     end
   end
 
@@ -99,7 +77,7 @@ describe Hbc::CLI::Style, :cask do
     subject { cli.cask_paths }
 
     before do
-      allow(cli).to receive(:cask_tokens).and_return(tokens)
+      allow(described_class).to receive(:cask_tokens_from).and_return(tokens)
     end
 
     context "when no cask tokens are given" do
@@ -136,40 +114,6 @@ describe Hbc::CLI::Style, :cask do
     end
   end
 
-  describe "#cask_tokens" do
-    subject { cli.cask_tokens }
-
-    context "when no args are given" do
-      let(:args) { [] }
-      it { is_expected.to be_empty }
-    end
-
-    context "when only flags are given" do
-      let(:args) { ["--fix"] }
-      it { is_expected.to be_empty }
-    end
-
-    context "when only empty args are given" do
-      let(:args) { ["", ""] }
-      it { is_expected.to be_empty }
-    end
-
-    context "when a cask token is given" do
-      let(:args) { ["adium"] }
-      it { is_expected.to eq(["adium"]) }
-    end
-
-    context "when multiple cask tokens are given" do
-      let(:args) { %w[adium dropbox] }
-      it { is_expected.to eq(%w[adium dropbox]) }
-    end
-
-    context "when cask tokens are given with flags" do
-      let(:args) { ["adium", "dropbox", "--fix"] }
-      it { is_expected.to eq(%w[adium dropbox]) }
-    end
-  end
-
   describe "#rubocop_args" do
     subject { cli.rubocop_args }