Add RSpec tests for bottle_block and formula_desc cops

Library/Homebrew/test/.bundle/config

 ---
 BUNDLE_PATH: "../vendor/bundle"
-BUNDLE_DISABLE_SHARED_GEMS: '1'
+BUNDLE_DISABLE_SHARED_GEMS: "true"

Library/Homebrew/test/Gemfile

@@ -2,6 +2,7 @@ source "https://rubygems.org"
 
 gem "parallel_tests"
 gem "rspec"
+gem "rubocop"
 gem "rspec-its", require: false
 gem "rspec-wait", require: false
 

Library/Homebrew/test/Gemfile.lock

 GEM
   remote: https://rubygems.org/
   specs:
+    ast (2.3.0)
     codecov (0.1.9)
       json
       simplecov
@@ -11,6 +12,10 @@ GEM
     parallel (1.10.0)
     parallel_tests (2.13.0)
       parallel
+    parser (2.4.0.0)
+      ast (~> 2.2)
+    powerpack (0.1.1)
+    rainbow (2.2.1)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
       rspec-expectations (~> 3.5.0)
@@ -29,11 +34,19 @@ GEM
     rspec-support (3.5.0)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
+    rubocop (0.47.1)
+      parser (>= 2.3.3.1, < 3.0)
+      powerpack (~> 0.1)
+      rainbow (>= 1.99.1, < 3.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (~> 1.0, >= 1.0.1)
+    ruby-progressbar (1.8.1)
     simplecov (0.13.0)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
+    unicode-display_width (1.1.3)
     url (0.3.2)
 
 PLATFORMS
@@ -45,6 +58,7 @@ DEPENDENCIES
   rspec
   rspec-its
   rspec-wait
+  rubocop
   simplecov
 
 BUNDLED WITH

Library/Homebrew/test/rubocops/bottle_block_cop_spec.rb

+require "rubocop"
+require "rubocop/rspec/support"
+require_relative "../../extend/string"
+require_relative "../../rubocops/bottle_block_cop"
+
+describe RuboCop::Cop::Homebrew::CorrectBottleBlock do
+  subject(:cop) { described_class.new }
+
+  context "When auditing Bottle Block" do
+    it "When there is revision in bottle block" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          bottle do
+            cellar :any
+            revision 2
+          end
+        end
+      EOS
+
+      expected_offenses = [{  message: "Use rebuild instead of revision in bottle block",
+                              severity: :convention,
+                              line: 5,
+                              column: 4,
+                              source: source }]
+
+      inspect_source(cop, source)
+
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
+
+    def expect_offense(expected, actual)
+      expect(actual.message).to eq(expected[:message])
+      expect(actual.severity).to eq(expected[:severity])
+      expect(actual.line).to eq(expected[:line])
+      expect(actual.column).to eq(expected[:column])
+    end
+  end
+
+  context "When auditing Bottle Block with auto correct" do
+    it "When there is revision in bottle block" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          bottle do
+            cellar :any
+            revision 2
+          end
+        end
+      EOS
+      corrected_source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          bottle do
+            cellar :any
+            rebuild 2
+          end
+        end
+      EOS
+
+      new_source = autocorrect_source(cop, source)
+      expect(new_source).to eq(corrected_source)
+    end
+  end
+end

Library/Homebrew/test/rubocops/formula_desc_cop_spec.rb

+require "rubocop"
+require "rubocop/rspec/support"
+require_relative "../../extend/string"
+require_relative "../../rubocops/formula_desc_cop"
+
+describe RuboCop::Cop::Homebrew::FormulaDesc do
+  subject(:cop) { described_class.new }
+
+  context "When auditing formula desc" do
+    it "When there is no desc" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+        end
+      EOS
+
+      expected_offenses = [{  message: "Formula should have a desc (Description).",
+                              severity: :convention,
+                              line: 1,
+                              column: 0,
+                              source: source }]
+
+      inspect_source(cop, source)
+
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
+
+    it "When desc is too long" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          desc '#{"bar"*30}'
+        end
+      EOS
+
+      msg = <<-EOS.undent
+        Description is too long. "name: desc" should be less than 80 characters.
+        Length is calculated as Foo + desc. (currently 95)
+      EOS
+      expected_offenses = [{ message: msg,
+                             severity: :convention,
+                             line: 3,
+                             column: 7,
+                             source: source }]
+
+      inspect_source(cop, source)
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
+
+    it "When wrong \"command-line\" usage in desc" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          desc 'command line'
+        end
+      EOS
+
+      expected_offenses = [{ message: "Description should use \"command-line\" instead of \"command line\"",
+                             severity: :convention,
+                             line: 3,
+                             column: 8,
+                             source: source }]
+
+      inspect_source(cop, source)
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
+
+    it "When an article is used in desc" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          desc 'An '
+        end
+      EOS
+
+      expected_offenses = [{ message: "Description shouldn't start with an indefinite article (An )",
+                             severity: :convention,
+                             line: 3,
+                             column: 8,
+                             source: source }]
+
+      inspect_source(cop, source)
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
+
+    it "When formula name is in desc" do
+      source = <<-EOS.undent
+        class Foo < Formula
+          url 'http://example.com/foo-1.0.tgz'
+          desc 'Foo'
+        end
+      EOS
+
+      expected_offenses = [{ message: "Description shouldn't include the formula name",
+                             severity: :convention,
+                             line: 3,
+                             column: 8,
+                             source: source }]
+
+      inspect_source(cop, source)
+      expected_offenses.zip(cop.offenses).each do |expected, actual|
+        expect_offense(expected, actual)
+      end
+    end
+
+    def expect_offense(expected, actual)
+      expect(actual.message).to eq(expected[:message])
+      expect(actual.severity).to eq(expected[:severity])
+      expect(actual.line).to eq(expected[:line])
+      expect(actual.column).to eq(expected[:column])
+    end
+  end
+end