Add AkismetService unit tests

spec/services/akismet_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe AkismetService do
+  let(:fake_akismet_client) { double(:akismet_client) }
+
+  let_it_be(:text) { "Would you like to buy some tinned meat product?" }
+  let_it_be(:spam_owner) { create(:user) }
+
+  subject do
+    options = { ip_address: '1.2.3.4', user_agent: 'some user_agent', referrer: 'some referrer' }
+    described_class.new(spam_owner.name, spam_owner.email, text, options)
+  end
+
+  before do
+    stub_application_setting(akismet_enabled: true)
+    allow(subject).to receive(:akismet_client).and_return(fake_akismet_client)
+  end
+
+  shared_examples 'no activity if Akismet is not enabled' do |method_call|
+    # if the method name is `submit`, it requires an argument, so add it
+    before do
+      stub_application_setting(akismet_enabled: false)
+    end
+
+    it 'is automatically false' do
+      expect(subject.send(method_call)).to be_falsey
+    end
+
+    it 'performs no check' do
+      expect(fake_akismet_client).not_to receive(:public_send)
+
+      subject.send(method_call)
+    end
+  end
+
+  shared_examples 'false if Akismet is not available' do |method_call|
+    context 'if Akismet is not available' do
+      before do
+        allow(fake_akismet_client).to receive(:public_send).and_raise(StandardError.new("oh noes!"))
+      end
+
+      specify do
+        expect(subject.send(method_call)).to be_falsey
+      end
+
+      it 'logs an error' do
+        logger_spy = double(:logger)
+        expect(Rails).to receive(:logger).and_return(logger_spy)
+        expect(logger_spy).to receive(:error).with(/skipping/)
+
+        subject.send(method_call)
+      end
+    end
+  end
+
+  describe '#spam?' do
+    it_behaves_like 'no activity if Akismet is not enabled', :spam?, :check
+
+    context 'if Akismet is enabled' do
+      context 'the text is spam' do
+        before do
+          allow(fake_akismet_client).to receive(:check).and_return([true, false])
+        end
+
+        specify do
+          expect(subject.spam?).to be_truthy
+        end
+      end
+
+      context 'the text is blatant spam' do
+        before do
+          allow(fake_akismet_client).to receive(:check).and_return([false, true])
+        end
+
+        specify do
+          expect(subject.spam?).to be_truthy
+        end
+      end
+
+      context 'the text is not spam' do
+        before do
+          allow(fake_akismet_client).to receive(:check).and_return([false, false])
+        end
+
+        specify do
+          expect(subject.spam?).to be_falsey
+        end
+      end
+
+      context 'if Akismet is not available' do
+        before do
+          allow(fake_akismet_client).to receive(:check).and_raise(StandardError.new("oh noes!"))
+        end
+
+        specify do
+          expect(subject.spam?).to be_falsey
+        end
+
+        it 'logs an error' do
+          logger_spy = double(:logger)
+          expect(Rails).to receive(:logger).and_return(logger_spy)
+          expect(logger_spy).to receive(:error).with(/skipping check/)
+
+          subject.spam?
+        end
+      end
+    end
+  end
+
+  describe '#submit_ham' do
+    it_behaves_like 'no activity if Akismet is not enabled', :submit_ham
+    it_behaves_like 'false if Akismet is not available', :submit_ham
+
+    context 'if Akismet is available' do
+      specify do
+        expect(fake_akismet_client).to receive(:public_send).with(:ham, any_args)
+
+        expect(subject.submit_ham).to be_truthy
+      end
+    end
+  end
+
+  describe '#submit_spam' do
+    it_behaves_like 'no activity if Akismet is not enabled', :submit_spam
+    it_behaves_like 'false if Akismet is not available', :submit_spam
+
+    context 'if Akismet is available' do
+      specify do
+        expect(fake_akismet_client).to receive(:public_send).with(:spam, any_args)
+
+        expect(subject.submit_spam).to be_truthy
+      end
+    end
+  end
+end