Refactor letsencrypt generator spec

spec/letsencrypt/generators/lets_encrypt/install_generator_spec.rb

@@ -5,18 +5,21 @@
 require 'generators/lets_encrypt/install_generator'
 
 RSpec.describe LetsEncrypt::Generators::InstallGenerator do
-  before(:all) do
-    @dummy_class = Class.new(Rails::Generators::TestCase) do
+  let(:klass) do
+    Class.new(Rails::Generators::TestCase) do
       tests LetsEncrypt::Generators::InstallGenerator
       destination Rails.root.join('tmp')
     end
+  end
+
+  let(:generator) { klass.new(:fake_test_case) }
 
-    @generator = @dummy_class.new(:fake_test_case)
-    @generator.send(:prepare_destination)
-    @generator.run_generator
+  before do
+    generator.send(:prepare_destination)
+    generator.run_generator
   end
 
   it do
-    @generator.assert_migration 'db/migrate/create_letsencrypt_certificates.rb', /def change/
+    generator.assert_migration 'db/migrate/create_letsencrypt_certificates.rb', /def change/
   end
 end

spec/letsencrypt/generators/lets_encrypt/register_generator_spec.rb

@@ -5,26 +5,28 @@
 require 'generators/lets_encrypt/register_generator'
 
 RSpec.describe LetsEncrypt::Generators::RegisterGenerator do
-  before(:all) do
-    @dummy_class = Class.new(Rails::Generators::TestCase) do
+  let(:klass) do
+    Class.new(Rails::Generators::TestCase) do
       tests LetsEncrypt::Generators::RegisterGenerator
       destination Rails.root.join('tmp')
     end
-    @generator = @dummy_class.new(:fake_test_case)
   end
 
-  it do
+  let(:generator) { klass.new(:fake_test_case) }
+
+  before do
     answers = [
       '', # In production
       '', # File path
       'Y', # Overwrite?
       '[email protected]' # E-Mail
     ]
     allow(Thor::LineEditor).to receive(:readline) { answers.shift.dup || 'N' }
+    allow(LetsEncrypt).to receive(:register).and_return(true)
 
-    expect(LetsEncrypt).to receive(:register).and_return(true)
-
-    @generator.send(:prepare_destination)
-    @generator.run_generator
+    generator.send(:prepare_destination)
+    generator.run_generator
   end
+
+  it { expect(LetsEncrypt).to have_received(:register).with('[email protected]') }
 end