Refactor `MissingFormula` spec.

Library/Homebrew/.rubocop.yml

@@ -88,3 +88,7 @@ Style/HashSyntax:
 # so many of these in formulae but none in here
 Style/TrailingBodyOnMethodDefinition:
   Enabled: true
+
+Rspec/ExpectActual:
+  Exclude:
+    - 'test/missing_formula_spec.rb'

Library/Homebrew/cmd/info.rb

@@ -60,7 +60,7 @@ module Homebrew
         rescue FormulaUnavailableError => e
           ofail e.message
           # No formula with this name, try a missing formula lookup
-          if (reason = Homebrew::MissingFormula.reason(f))
+          if (reason = MissingFormula.reason(f))
             $stderr.puts reason
           end
         end

Library/Homebrew/cmd/install.rb

@@ -257,7 +257,7 @@ module Homebrew
       end
 
       ofail e.message
-      if (reason = Homebrew::MissingFormula.reason(e.name))
+      if (reason = MissingFormula.reason(e.name))
         $stderr.puts reason
         return
       end

Library/Homebrew/cmd/search.rb

@@ -64,7 +64,7 @@ module Homebrew
         count = local_results.length + tap_results.length
 
         ohai "Searching blacklisted, migrated and deleted formulae..."
-        if reason = Homebrew::MissingFormula.reason(query, silent: true)
+        if reason = MissingFormula.reason(query, silent: true)
           if count.positive?
             puts
             puts "If you meant #{query.inspect} specifically:"

Library/Homebrew/dev-cmd/audit.rb

@@ -308,7 +308,7 @@ class FormulaAuditor
 
     name = formula.name
 
-    if Homebrew::MissingFormula.blacklisted_reason(name)
+    if MissingFormula.blacklisted_reason(name)
       problem "'#{name}' is blacklisted."
     end
 

Library/Homebrew/dev-cmd/create.rb

@@ -65,7 +65,7 @@ module Homebrew
     # Don't allow blacklisted formula, or names that shadow aliases,
     # unless --force is specified.
     unless ARGV.force?
-      if reason = Homebrew::MissingFormula.blacklisted_reason(fc.name)
+      if reason = MissingFormula.blacklisted_reason(fc.name)
         raise "#{fc.name} is blacklisted for creation.\n#{reason}\nIf you really want to create this formula use --force."
       end
 

Library/Homebrew/test/missing_formula_spec.rb

 require "missing_formula"
 
 describe Homebrew::MissingFormula do
-  context "::reason" do
+  describe "::reason" do
     subject { described_class.reason("gem") }
 
     it { is_expected.not_to be_nil }
   end
 
-  context "::blacklisted_reason" do
-    matcher(:be_blacklisted) do
+  describe "::blacklisted_reason" do
+    matcher :be_blacklisted do
       match do |expected|
         described_class.blacklisted_reason(expected)
       end
     end
 
-    context "rubygems" do
-      %w[gem rubygem rubygems].each do |s|
-        subject { s }
-
-        it { is_expected.to be_blacklisted }
-      end
+    specify "RubyGems is blacklisted" do
+      expect(%w[gem rubygem rubygems]).to all be_blacklisted
     end
 
-    context "latex" do
-      %w[latex tex tex-live texlive TexLive].each do |s|
-        subject { s }
-
-        it { is_expected.to be_blacklisted }
-      end
+    specify "LaTeX is blacklisted" do
+      expect(%w[latex tex tex-live texlive TexLive]).to all be_blacklisted
     end
 
-    context "pip" do
-      subject { "pip" }
-
-      it { is_expected.to be_blacklisted }
+    specify "pip is blacklisted" do
+      expect("pip").to be_blacklisted
     end
 
-    context "pil" do
-      subject { "pil" }
-
-      it { is_expected.to be_blacklisted }
+    specify "PIL is blacklisted" do
+      expect("pil").to be_blacklisted
     end
 
-    context "macruby" do
-      subject { "MacRuby" }
-
-      it { is_expected.to be_blacklisted }
+    specify "MacRuby is blacklisted" do
+      expect("MacRuby").to be_blacklisted
     end
 
-    context "lzma" do
-      %w[lzma liblzma].each do |s|
-        subject { s }
-
-        it { is_expected.to be_blacklisted }
-      end
+    specify "lzma is blacklisted" do
+      expect(%w[lzma liblzma]).to all be_blacklisted
     end
 
-    context "gtest" do
-      %w[gtest googletest google-test].each do |s|
-        subject { s }
-
-        it { is_expected.to be_blacklisted }
-      end
+    specify "gtest is blacklisted" do
+      expect(%w[gtest googletest google-test]).to all be_blacklisted
     end
 
-    context "gmock" do
-      %w[gmock googlemock google-mock].each do |s|
-        subject { s }
-
-        it { is_expected.to be_blacklisted }
-      end
+    specify "gmock is blacklisted" do
+      expect(%w[gmock googlemock google-mock]).to all be_blacklisted
     end
 
-    context "sshpass" do
-      subject { "sshpass" }
-
-      it { is_expected.to be_blacklisted }
+    specify "sshpass is blacklisted" do
+      expect("sshpass").to be_blacklisted
     end
 
-    context "gsutil" do
-      subject { "gsutil" }
-
-      it { is_expected.to be_blacklisted }
+    specify "gsutil is blacklisted" do
+      expect("gsutil").to be_blacklisted
     end
 
-    context "gfortran" do
-      subject { "gfortran" }
-
-      it { is_expected.to be_blacklisted }
+    specify "gfortran is blacklisted" do
+      expect("gfortran").to be_blacklisted
     end
 
-    context "play" do
-      subject { "play" }
-
-      it { is_expected.to be_blacklisted }
+    specify "play is blacklisted" do
+      expect("play").to be_blacklisted
     end
 
-    context "haskell-platform" do
-      subject { "haskell-platform" }
-
-      it { is_expected.to be_blacklisted }
+    specify "haskell-platform is blacklisted" do
+      expect("haskell-platform").to be_blacklisted
     end
 
-    context "xcode", :needs_macos do
-      %w[xcode Xcode].each do |s|
-        subject { s }
-
-        it { is_expected.to be_blacklisted }
-      end
+    specify "Xcode is blacklisted", :needs_macos do
+      expect(%w[xcode Xcode]).to all be_blacklisted
     end
   end
 
-  context "::tap_migration_reason" do
+  describe "::tap_migration_reason" do
     subject { described_class.tap_migration_reason(formula) }
 
     before do
@@ -136,7 +96,7 @@ describe Homebrew::MissingFormula do
     end
   end
 
-  context "::deleted_reason" do
+  describe "::deleted_reason" do
     subject { described_class.deleted_reason(formula, silent: true) }
 
     before do