Add LoginActivity model spec and BrowserDetection concern shared example (#32959)

spec/models/login_activity_spec.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe LoginActivity do
+  include_examples 'BrowserDetection'
+
+  describe 'Associations' do
+    it { is_expected.to belong_to(:user).required }
+  end
+
+  describe 'Validations' do
+    subject { Fabricate.build :login_activity }
+
+    it { is_expected.to define_enum_for(:authentication_method).backed_by_column_of_type(:string) }
+  end
+end

spec/models/session_activation_spec.rb

@@ -3,39 +3,7 @@
 require 'rails_helper'
 
 RSpec.describe SessionActivation do
-  describe '#detection' do
-    let(:session_activation) { Fabricate(:session_activation, user_agent: 'Chrome/62.0.3202.89') }
-
-    it 'sets a Browser instance as detection' do
-      expect(session_activation.detection).to be_a Browser::Chrome
-    end
-  end
-
-  describe '#browser' do
-    before do
-      allow(session_activation).to receive(:detection).and_return(detection)
-    end
-
-    let(:detection)          { instance_double(Browser::Chrome, id: 1) }
-    let(:session_activation) { Fabricate(:session_activation) }
-
-    it 'returns detection.id' do
-      expect(session_activation.browser).to be 1
-    end
-  end
-
-  describe '#platform' do
-    before do
-      allow(session_activation).to receive(:detection).and_return(detection)
-    end
-
-    let(:session_activation) { Fabricate(:session_activation) }
-    let(:detection)          { instance_double(Browser::Chrome, platform: instance_double(Browser::Platform, id: 1)) }
-
-    it 'returns detection.platform.id' do
-      expect(session_activation.platform).to be 1
-    end
-  end
+  include_examples 'BrowserDetection'
 
   describe '.active?' do
     subject { described_class.active?(id) }