Add Account#remote? query method (#33508)

spec/models/account_spec.rb

@@ -48,14 +48,34 @@ RSpec.describe Account do
   end
 
   describe '#local?' do
-    it 'returns true when the account is local' do
+    it 'returns true when domain is null' do
       account = Fabricate(:account, domain: nil)
-      expect(account.local?).to be true
+      expect(account).to be_local
     end
 
-    it 'returns false when the account is on a different domain' do
+    it 'returns false when domain is present' do
       account = Fabricate(:account, domain: 'foreign.tld')
-      expect(account.local?).to be false
+      expect(account).to_not be_local
+    end
+  end
+
+  describe '#remote?' do
+    context 'when the domain is null' do
+      subject { Fabricate.build :account, domain: nil }
+
+      it { is_expected.to_not be_remote }
+    end
+
+    context 'when the domain is blank' do
+      subject { Fabricate.build :account, domain: '' }
+
+      it { is_expected.to_not be_remote }
+    end
+
+    context 'when the domain is present' do
+      subject { Fabricate.build :account, domain: 'host.example' }
+
+      it { is_expected.to be_remote }
     end
   end