Add tests for Streamable (#5771)

spec/models/concerns/streamable_spec.rb

@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Streamable do
+  class Parent
+    def title; end
+
+    def target; end
+
+    def thread; end
+
+    def self.has_one(*); end
+
+    def self.after_create; end
+  end
+
+  class Child < Parent
+    include Streamable
+  end
+
+  child = Child.new
+
+  describe '#title' do
+    it 'calls Parent#title' do
+      expect_any_instance_of(Parent).to receive(:title)
+      child.title
+    end
+  end
+
+  describe '#content' do
+    it 'calls #title' do
+      expect_any_instance_of(Parent).to receive(:title)
+      child.content
+    end
+  end
+
+  describe '#target' do
+    it 'calls Parent#target' do
+      expect_any_instance_of(Parent).to receive(:target)
+      child.target
+    end
+  end
+
+  describe '#object_type' do
+    it 'returns :activity' do
+      expect(child.object_type).to eq :activity
+    end
+  end
+
+  describe '#thread' do
+    it 'calls Parent#thread' do
+      expect_any_instance_of(Parent).to receive(:thread)
+      child.thread
+    end
+  end
+
+  describe '#hidden?' do
+    it 'returns false' do
+      expect(child.hidden?).to be false
+    end
+  end
+end