Gab Social. All are welcome.

spec/models/concerns/account_finder_concern_spec.rb

@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe AccountFinderConcern do
+  describe 'local finders' do
+    before do
+      @account = Fabricate(:account, username: 'Alice')
+    end
+
+    describe '.find_local' do
+      it 'returns case-insensitive result' do
+        expect(Account.find_local('alice')).to eq(@account)
+      end
+
+      it 'returns correctly cased result' do
+        expect(Account.find_local('Alice')).to eq(@account)
+      end
+
+      it 'returns nil without a match' do
+        expect(Account.find_local('a_ice')).to be_nil
+      end
+
+      it 'returns nil for regex style username value' do
+        expect(Account.find_local('al%')).to be_nil
+      end
+
+      it 'returns nil for nil username value' do
+        expect(Account.find_local(nil)).to be_nil
+      end
+
+      it 'returns nil for blank username value' do
+        expect(Account.find_local('')).to be_nil
+      end
+    end
+
+    describe '.find_local!' do
+      it 'returns matching result' do
+        expect(Account.find_local!('alice')).to eq(@account)
+      end
+
+      it 'raises on non-matching result' do
+        expect { Account.find_local!('missing') }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+
+      it 'raises with blank username' do
+        expect { Account.find_local!('') }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+
+      it 'raises with nil username' do
+        expect { Account.find_local!(nil) }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+    end
+  end
+
+  describe 'remote finders' do
+    before do
+      @account = Fabricate(:account, username: 'Alice', domain: 'gab.com')
+    end
+
+    describe '.find_remote' do
+      it 'returns exact match result' do
+        expect(Account.find_remote('alice', 'gab.com')).to eq(@account)
+      end
+
+      it 'returns case-insensitive result' do
+        expect(Account.find_remote('ALICE', 'GAB.COM')).to eq(@account)
+      end
+
+      it 'returns nil when username does not match' do
+        expect(Account.find_remote('a_ice', 'gab.com')).to be_nil
+      end
+
+      it 'returns nil when domain does not match' do
+        expect(Account.find_remote('alice', 'g_b.com')).to be_nil
+      end
+
+      it 'returns nil for regex style domain value' do
+        expect(Account.find_remote('alice', 'm%')).to be_nil
+      end
+
+      it 'returns nil for nil username value' do
+        expect(Account.find_remote(nil, 'domain')).to be_nil
+      end
+
+      it 'returns nil for blank username value' do
+        expect(Account.find_remote('', 'domain')).to be_nil
+      end
+    end
+
+    describe '.find_remote!' do
+      it 'returns matching result' do
+        expect(Account.find_remote!('alice', 'gab.com')).to eq(@account)
+      end
+
+      it 'raises on non-matching result' do
+        expect { Account.find_remote!('missing', 'gab.host') }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+
+      it 'raises with blank username' do
+        expect { Account.find_remote!('', '') }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+
+      it 'raises with nil username' do
+        expect { Account.find_remote!(nil, nil) }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+    end
+  end
+end

spec/models/concerns/account_interactions_spec.rb

@@ -0,0 +1,613 @@
+require 'rails_helper'
+
+describe AccountInteractions do
+  let(:account)            { Fabricate(:account, username: 'account') }
+  let(:account_id)         { account.id }
+  let(:account_ids)        { [account_id] }
+  let(:target_account)     { Fabricate(:account, username: 'target') }
+  let(:target_account_id)  { target_account.id }
+  let(:target_account_ids) { [target_account_id] }
+
+  describe '.following_map' do
+    subject { Account.following_map(target_account_ids, account_id) }
+
+    context 'account with Follow' do
+      it 'returns { target_account_id => true }' do
+        Fabricate(:follow, account: account, target_account: target_account)
+        is_expected.to eq(target_account_id => { reblogs: true })
+      end
+    end
+
+    context 'account without Follow' do
+      it 'returns {}' do
+        is_expected.to eq({})
+      end
+    end
+  end
+
+  describe '.followed_by_map' do
+    subject { Account.followed_by_map(target_account_ids, account_id) }
+
+    context 'account with Follow' do
+      it 'returns { target_account_id => true }' do
+        Fabricate(:follow, account: target_account, target_account: account)
+        is_expected.to eq(target_account_id => true)
+      end
+    end
+
+    context 'account without Follow' do
+      it 'returns {}' do
+        is_expected.to eq({})
+      end
+    end
+  end
+
+  describe '.blocking_map' do
+    subject { Account.blocking_map(target_account_ids, account_id) }
+
+    context 'account with Block' do
+      it 'returns { target_account_id => true }' do
+        Fabricate(:block, account: account, target_account: target_account)
+        is_expected.to eq(target_account_id => true)
+      end
+    end
+
+    context 'account without Block' do
+      it 'returns {}' do
+        is_expected.to eq({})
+      end
+    end
+  end
+
+  describe '.muting_map' do
+    subject { Account.muting_map(target_account_ids, account_id) }
+
+    context 'account with Mute' do
+      before do
+        Fabricate(:mute, target_account: target_account, account: account, hide_notifications: hide)
+      end
+
+      context 'if Mute#hide_notifications?' do
+        let(:hide) { true }
+
+        it 'returns { target_account_id => { notifications: true } }' do
+          is_expected.to eq(target_account_id => { notifications: true })
+        end
+      end
+
+      context 'unless Mute#hide_notifications?' do
+        let(:hide) { false }
+
+        it 'returns { target_account_id => { notifications: false } }' do
+          is_expected.to eq(target_account_id => { notifications: false })
+        end
+      end
+    end
+
+    context 'account without Mute' do
+      it 'returns {}' do
+        is_expected.to eq({})
+      end
+    end
+  end
+
+  describe '#follow!' do
+    it 'creates and returns Follow' do
+      expect do
+        expect(account.follow!(target_account)).to be_kind_of Follow
+      end.to change { account.following.count }.by 1
+    end
+  end
+
+  describe '#block' do
+    it 'creates and returns Block' do
+      expect do
+        expect(account.block!(target_account)).to be_kind_of Block
+      end.to change { account.block_relationships.count }.by 1
+    end
+  end
+
+  describe '#mute!' do
+    subject { account.mute!(target_account, notifications: arg_notifications) }
+
+    context 'Mute does not exist yet' do
+      context 'arg :notifications is nil' do
+        let(:arg_notifications) { nil }
+
+        it 'creates Mute, and returns Mute' do
+          expect do
+            expect(subject).to be_kind_of Mute
+          end.to change { account.mute_relationships.count }.by 1
+        end
+      end
+
+      context 'arg :notifications is false' do
+        let(:arg_notifications) { false }
+
+        it 'creates Mute, and returns Mute' do
+          expect do
+            expect(subject).to be_kind_of Mute
+          end.to change { account.mute_relationships.count }.by 1
+        end
+      end
+
+      context 'arg :notifications is true' do
+        let(:arg_notifications) { true }
+
+        it 'creates Mute, and returns Mute' do
+          expect do
+            expect(subject).to be_kind_of Mute
+          end.to change { account.mute_relationships.count }.by 1
+        end
+      end
+    end
+
+    context 'Mute already exists' do
+      before do
+        account.mute_relationships << mute
+      end
+
+      let(:mute) do
+        Fabricate(:mute,
+                  account:            account,
+                  target_account:     target_account,
+                  hide_notifications: hide_notifications)
+      end
+
+      context 'mute.hide_notifications is true' do
+        let(:hide_notifications) { true }
+
+        context 'arg :notifications is nil' do
+          let(:arg_notifications) { nil }
+
+          it 'returns Mute without updating mute.hide_notifications' do
+            expect do
+              expect(subject).to be_kind_of Mute
+            end.not_to change { mute.reload.hide_notifications? }.from(true)
+          end
+        end
+
+        context 'arg :notifications is false' do
+          let(:arg_notifications) { false }
+
+          it 'returns Mute, and updates mute.hide_notifications false' do
+            expect do
+              expect(subject).to be_kind_of Mute
+            end.to change { mute.reload.hide_notifications? }.from(true).to(false)
+          end
+        end
+
+        context 'arg :notifications is true' do
+          let(:arg_notifications) { true }
+
+          it 'returns Mute without updating mute.hide_notifications' do
+            expect do
+              expect(subject).to be_kind_of Mute
+            end.not_to change { mute.reload.hide_notifications? }.from(true)
+          end
+        end
+      end
+
+      context 'mute.hide_notifications is false' do
+        let(:hide_notifications) { false }
+
+        context 'arg :notifications is nil' do
+          let(:arg_notifications) { nil }
+
+          it 'returns Mute, and updates mute.hide_notifications true' do
+            expect do
+              expect(subject).to be_kind_of Mute
+            end.to change { mute.reload.hide_notifications? }.from(false).to(true)
+          end
+        end
+
+        context 'arg :notifications is false' do
+          let(:arg_notifications) { false }
+
+          it 'returns Mute without updating mute.hide_notifications' do
+            expect do
+              expect(subject).to be_kind_of Mute
+            end.not_to change { mute.reload.hide_notifications? }.from(false)
+          end
+        end
+
+        context 'arg :notifications is true' do
+          let(:arg_notifications) { true }
+
+          it 'returns Mute, and updates mute.hide_notifications true' do
+            expect do
+              expect(subject).to be_kind_of Mute
+            end.to change { mute.reload.hide_notifications? }.from(false).to(true)
+          end
+        end
+      end
+    end
+  end
+
+  describe '#mute_conversation!' do
+    let(:conversation) { Fabricate(:conversation) }
+
+    subject { account.mute_conversation!(conversation) }
+
+    it 'creates and returns ConversationMute' do
+      expect do
+        is_expected.to be_kind_of ConversationMute
+      end.to change { account.conversation_mutes.count }.by 1
+    end
+  end
+
+  describe '#block_domain!' do
+    let(:domain) { 'example.com' }
+
+    subject { account.block_domain!(domain) }
+
+    it 'creates and returns AccountDomainBlock' do
+      expect do
+        is_expected.to be_kind_of AccountDomainBlock
+      end.to change { account.domain_blocks.count }.by 1
+    end
+  end
+
+  describe '#unfollow!' do
+    subject { account.unfollow!(target_account) }
+
+    context 'following target_account' do
+      it 'returns destroyed Follow' do
+        account.active_relationships.create(target_account: target_account)
+        is_expected.to be_kind_of Follow
+        expect(subject).to be_destroyed
+      end
+    end
+
+    context 'not following target_account' do
+      it 'returns nil' do
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#unblock!' do
+    subject { account.unblock!(target_account) }
+
+    context 'blocking target_account' do
+      it 'returns destroyed Block' do
+        account.block_relationships.create(target_account: target_account)
+        is_expected.to be_kind_of Block
+        expect(subject).to be_destroyed
+      end
+    end
+
+    context 'not blocking target_account' do
+      it 'returns nil' do
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#unmute!' do
+    subject { account.unmute!(target_account) }
+
+    context 'muting target_account' do
+      it 'returns destroyed Mute' do
+        account.mute_relationships.create(target_account: target_account)
+        is_expected.to be_kind_of Mute
+        expect(subject).to be_destroyed
+      end
+    end
+
+    context 'not muting target_account' do
+      it 'returns nil' do
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#unmute_conversation!' do
+    let(:conversation) { Fabricate(:conversation) }
+
+    subject { account.unmute_conversation!(conversation) }
+
+    context 'muting the conversation' do
+      it 'returns destroyed ConversationMute' do
+        account.conversation_mutes.create(conversation: conversation)
+        is_expected.to be_kind_of ConversationMute
+        expect(subject).to be_destroyed
+      end
+    end
+
+    context 'not muting the conversation' do
+      it 'returns nil' do
+        is_expected.to be nil
+      end
+    end
+  end
+
+  describe '#unblock_domain!' do
+    let(:domain) { 'example.com' }
+
+    subject { account.unblock_domain!(domain) }
+
+    context 'blocking the domain' do
+      it 'returns destroyed AccountDomainBlock' do
+        account_domain_block = Fabricate(:account_domain_block, domain: domain)
+        account.domain_blocks << account_domain_block
+        is_expected.to be_kind_of AccountDomainBlock
+        expect(subject).to be_destroyed
+      end
+    end
+
+    context 'unblocking the domain' do
+      it 'returns nil' do
+        is_expected.to be_nil
+      end
+    end
+  end
+
+  describe '#following?' do
+    subject { account.following?(target_account) }
+
+    context 'following target_account' do
+      it 'returns true' do
+        account.active_relationships.create(target_account: target_account)
+        is_expected.to be true
+      end
+    end
+
+    context 'not following target_account' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#blocking?' do
+    subject { account.blocking?(target_account) }
+
+    context 'blocking target_account' do
+      it 'returns true' do
+        account.block_relationships.create(target_account: target_account)
+        is_expected.to be true
+      end
+    end
+
+    context 'not blocking target_account' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#domain_blocking?' do
+    let(:domain)               { 'example.com' }
+
+    subject { account.domain_blocking?(domain) }
+
+    context 'blocking the domain' do
+      it' returns true' do
+        account_domain_block = Fabricate(:account_domain_block, domain: domain)
+        account.domain_blocks << account_domain_block
+        is_expected.to be true
+      end
+    end
+
+    context 'not blocking the domain' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#muting?' do
+    subject { account.muting?(target_account) }
+
+    context 'muting target_account' do
+      it 'returns true' do
+        mute = Fabricate(:mute, account: account, target_account: target_account)
+        account.mute_relationships << mute
+        is_expected.to be true
+      end
+    end
+
+    context 'not muting target_account' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#muting_conversation?' do
+    let(:conversation) { Fabricate(:conversation) }
+
+    subject { account.muting_conversation?(conversation) }
+
+    context 'muting the conversation' do
+      it 'returns true' do
+        account.conversation_mutes.create(conversation: conversation)
+        is_expected.to be true
+      end
+    end
+
+    context 'not muting the conversation' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#muting_notifications?' do
+    before do
+      mute = Fabricate(:mute, target_account: target_account, account: account, hide_notifications: hide)
+      account.mute_relationships << mute
+    end
+
+    subject { account.muting_notifications?(target_account) }
+
+    context 'muting notifications of target_account' do
+      let(:hide) { true }
+
+      it 'returns true' do
+        is_expected.to be true
+      end
+    end
+
+    context 'not muting notifications of target_account' do
+      let(:hide) { false }
+
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#requested?' do
+    subject { account.requested?(target_account) }
+
+    context 'requested by target_account' do
+      it 'returns true' do
+        Fabricate(:follow_request, account: account, target_account: target_account)
+        is_expected.to be true
+      end
+    end
+
+    context 'not requested by target_account' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#favourited?' do
+    let(:status) { Fabricate(:status, account: account, favourites: favourites) }
+
+    subject { account.favourited?(status) }
+
+    context 'favorited' do
+      let(:favourites) { [Fabricate(:favourite, account: account)] }
+
+      it 'returns true' do
+        is_expected.to be true
+      end
+    end
+
+    context 'not favorited' do
+      let(:favourites) { [] }
+
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#reblogged?' do
+    let(:status) { Fabricate(:status, account: account, reblogs: reblogs) }
+
+    subject { account.reblogged?(status) }
+
+    context 'reblogged' do
+      let(:reblogs) { [Fabricate(:status, account: account)] }
+
+      it 'returns true' do
+        is_expected.to be true
+      end
+    end
+
+    context 'not reblogged' do
+      let(:reblogs) { [] }
+
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe '#pinned?' do
+    let(:status) { Fabricate(:status, account: account) }
+
+    subject { account.pinned?(status) }
+
+    context 'pinned' do
+      it 'returns true' do
+        Fabricate(:status_pin, account: account, status: status)
+        is_expected.to be true
+      end
+    end
+
+    context 'not pinned' do
+      it 'returns false' do
+        is_expected.to be false
+      end
+    end
+  end
+
+  describe 'muting an account' do
+    let(:me) { Fabricate(:account, username: 'Me') }
+    let(:you) { Fabricate(:account, username: 'You') }
+
+    context 'with the notifications option unspecified' do
+      before do
+        me.mute!(you)
+      end
+
+      it 'defaults to muting notifications' do
+        expect(me.muting_notifications?(you)).to be true
+      end
+    end
+
+    context 'with the notifications option set to false' do
+      before do
+        me.mute!(you, notifications: false)
+      end
+
+      it 'does not mute notifications' do
+        expect(me.muting_notifications?(you)).to be false
+      end
+    end
+
+    context 'with the notifications option set to true' do
+      before do
+        me.mute!(you, notifications: true)
+      end
+
+      it 'does mute notifications' do
+        expect(me.muting_notifications?(you)).to be true
+      end
+    end
+  end
+
+  describe 'ignoring reblogs from an account' do
+    before do
+      @me = Fabricate(:account, username: 'Me')
+      @you = Fabricate(:account, username: 'You')
+    end
+
+    context 'with the reblogs option unspecified' do
+      before do
+        @me.follow!(@you)
+      end
+
+      it 'defaults to showing reblogs' do
+        expect(@me.muting_reblogs?(@you)).to be(false)
+      end
+    end
+
+    context 'with the reblogs option set to false' do
+      before do
+        @me.follow!(@you, reblogs: false)
+      end
+
+      it 'does mute reblogs' do
+        expect(@me.muting_reblogs?(@you)).to be(true)
+      end
+    end
+
+    context 'with the reblogs option set to true' do
+      before do
+        @me.follow!(@you, reblogs: true)
+      end
+
+      it 'does not mute reblogs' do
+        expect(@me.muting_reblogs?(@you)).to be(false)
+      end
+    end
+  end
+end

spec/models/concerns/remotable_spec.rb

@@ -0,0 +1,219 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Remotable do
+  class Foo
+    def initialize
+      @attrs = {}
+    end
+
+    def [](arg)
+      @attrs[arg]
+    end
+
+    def []=(arg1, arg2)
+      @attrs[arg1] = arg2
+    end
+
+    def hoge=(arg); end
+
+    def hoge_file_name=(arg); end
+
+    def has_attribute?(arg); end
+
+    def self.attachment_definitions
+      { hoge: nil }
+    end
+  end
+
+  context 'Remotable module is included' do
+    before do
+      class Foo
+        include Remotable
+        remotable_attachment :hoge, 1.kilobyte
+      end
+    end
+
+    let(:attribute_name) { "#{hoge}_remote_url".to_sym }
+    let(:code)           { 200 }
+    let(:file)           { 'filename="foo.txt"' }
+    let(:foo)            { Foo.new }
+    let(:headers)        { { 'content-disposition' => file } }
+    let(:hoge)           { :hoge }
+    let(:url)            { 'https://google.com' }
+
+    let(:request) do
+      stub_request(:get, url)
+        .to_return(status: code, headers: headers)
+    end
+
+    it 'defines a method #hoge_remote_url=' do
+      expect(foo).to respond_to(:hoge_remote_url=)
+    end
+
+    it 'defines a method #reset_hoge!' do
+      expect(foo).to respond_to(:reset_hoge!)
+    end
+
+    describe '#hoge_remote_url' do
+      before do
+        request
+      end
+
+      it 'always returns arg' do
+        [nil, '', [], {}].each do |arg|
+          expect(foo.hoge_remote_url = arg).to be arg
+        end
+      end
+
+      context 'Addressable::URI::InvalidURIError raised' do
+        it 'makes no request' do
+          allow(Addressable::URI).to receive_message_chain(:parse, :normalize)
+            .with(url).with(no_args).and_raise(Addressable::URI::InvalidURIError)
+
+          foo.hoge_remote_url = url
+          expect(request).not_to have_been_requested
+        end
+      end
+
+      context 'scheme is neither http nor https' do
+        let(:url) { 'ftp://google.com' }
+
+        it 'makes no request' do
+          foo.hoge_remote_url = url
+          expect(request).not_to have_been_requested
+        end
+      end
+
+      context 'parsed_url.host is empty' do
+        it 'makes no request' do
+          parsed_url = double(scheme: 'https', host: double(blank?: true))
+          allow(Addressable::URI).to receive_message_chain(:parse, :normalize)
+            .with(url).with(no_args).and_return(parsed_url)
+
+          foo.hoge_remote_url = url
+          expect(request).not_to have_been_requested
+        end
+      end
+
+      context 'parsed_url.host is nil' do
+        it 'makes no request' do
+          parsed_url = Addressable::URI.parse('https:https://example.com/path/file.png')
+          allow(Addressable::URI).to receive_message_chain(:parse, :normalize)
+            .with(url).with(no_args).and_return(parsed_url)
+
+          foo.hoge_remote_url = url
+          expect(request).not_to have_been_requested
+        end
+      end
+
+      context 'foo[attribute_name] == url' do
+        it 'makes no request' do
+          allow(foo).to receive(:[]).with(attribute_name).and_return(url)
+
+          foo.hoge_remote_url = url
+          expect(request).not_to have_been_requested
+        end
+      end
+
+      context "scheme is https, parsed_url.host isn't empty, and foo[attribute_name] != url" do
+        it 'makes a request' do
+          foo.hoge_remote_url = url
+          expect(request).to have_been_requested
+        end
+
+        context 'response.code != 200' do
+          let(:code) { 500 }
+
+          it 'calls not send' do
+            expect(foo).not_to receive(:send).with("#{hoge}=", any_args)
+            expect(foo).not_to receive(:send).with("#{hoge}_file_name=", any_args)
+            foo.hoge_remote_url = url
+          end
+        end
+
+        context 'response.code == 200' do
+          let(:code) { 200 }
+
+          context 'response contains headers["content-disposition"]' do
+            let(:file)      { 'filename="foo.txt"' }
+            let(:headers)   { { 'content-disposition' => file } }
+
+            it 'calls send' do
+              string_io = StringIO.new('')
+              extname   = '.txt'
+              basename  = '0123456789abcdef'
+
+              allow(SecureRandom).to receive(:hex).and_return(basename)
+              allow(StringIO).to receive(:new).with(anything).and_return(string_io)
+
+              expect(foo).to receive(:send).with("#{hoge}=", string_io)
+              expect(foo).to receive(:send).with("#{hoge}_file_name=", basename + extname)
+              foo.hoge_remote_url = url
+            end
+          end
+
+          context 'if has_attribute?' do
+            it 'calls foo[attribute_name] = url' do
+              allow(foo).to receive(:has_attribute?).with(attribute_name).and_return(true)
+              expect(foo).to receive('[]=').with(attribute_name, url)
+              foo.hoge_remote_url = url
+            end
+          end
+
+          context 'unless has_attribute?' do
+            it 'calls not foo[attribute_name] = url' do
+              allow(foo).to receive(:has_attribute?)
+                .with(attribute_name).and_return(false)
+              expect(foo).not_to receive('[]=').with(attribute_name, url)
+              foo.hoge_remote_url = url
+            end
+          end
+        end
+
+        context 'an error raised during the request' do
+          let(:request) { stub_request(:get, url).to_raise(error_class) }
+
+          error_classes = [
+            HTTP::TimeoutError,
+            HTTP::ConnectionError,
+            OpenSSL::SSL::SSLError,
+            Paperclip::Errors::NotIdentifiedByImageMagickError,
+            Addressable::URI::InvalidURIError,
+          ]
+
+          error_classes.each do |error_class|
+            let(:error_class) { error_class }
+
+            it 'calls Rails.logger.debug' do
+              expect(Rails.logger).to receive(:debug).with(/^Error fetching remote #{hoge}: /)
+              foo.hoge_remote_url = url
+            end
+          end
+        end
+      end
+    end
+
+    describe '#reset_hoge!' do
+      context 'if url.blank?' do
+        it 'returns nil, without clearing foo[attribute_name] and calling #hoge_remote_url=' do
+          url = nil
+          expect(foo).not_to receive(:send).with(:hoge_remote_url=, url)
+          foo[attribute_name] = url
+          expect(foo.reset_hoge!).to be_nil
+          expect(foo[attribute_name]).to be_nil
+        end
+      end
+
+      context 'unless url.blank?' do
+        it 'clears foo[attribute_name] and calls #hoge_remote_url=' do
+          foo[attribute_name] = url
+          expect(foo).to receive(:send).with(:hoge_remote_url=, url)
+          foo.reset_hoge!
+          expect(foo[attribute_name]).to be ''
+        end
+      end
+    end
+  end
+end

spec/models/concerns/status_threading_concern_spec.rb

@@ -0,0 +1,132 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe StatusThreadingConcern do
+  describe '#ancestors' do
+    let!(:alice)  { Fabricate(:account, username: 'alice') }
+    let!(:bob)    { Fabricate(:account, username: 'bob', domain: 'example.com') }
+    let!(:jeff)   { Fabricate(:account, username: 'jeff') }
+    let!(:status) { Fabricate(:status, account: alice) }
+    let!(:reply1) { Fabricate(:status, thread: status, account: jeff) }
+    let!(:reply2) { Fabricate(:status, thread: reply1, account: bob) }
+    let!(:reply3) { Fabricate(:status, thread: reply2, account: alice) }
+    let!(:viewer) { Fabricate(:account, username: 'viewer') }
+
+    it 'returns conversation history' do
+      expect(reply3.ancestors(4)).to include(status, reply1, reply2)
+    end
+
+    it 'does not return conversation history user is not allowed to see' do
+      reply1.update(visibility: :private)
+      status.update(visibility: :direct)
+
+      expect(reply3.ancestors(4, viewer)).to_not include(reply1, status)
+    end
+
+    it 'does not return conversation history from blocked users' do
+      viewer.block!(jeff)
+      expect(reply3.ancestors(4, viewer)).to_not include(reply1)
+    end
+
+    it 'does not return conversation history from muted users' do
+      viewer.mute!(jeff)
+      expect(reply3.ancestors(4, viewer)).to_not include(reply1)
+    end
+
+    it 'does not return conversation history from silenced and not followed users' do
+      jeff.silence!
+      expect(reply3.ancestors(4, viewer)).to_not include(reply1)
+    end
+
+    it 'does not return conversation history from blocked domains' do
+      viewer.block_domain!('example.com')
+      expect(reply3.ancestors(4, viewer)).to_not include(reply2)
+    end
+
+    it 'ignores deleted records' do
+      first_status  = Fabricate(:status, account: bob)
+      second_status = Fabricate(:status, thread: first_status, account: alice)
+
+      # Create cache and delete cached record
+      second_status.ancestors(4)
+      first_status.destroy
+
+      expect(second_status.ancestors(4)).to eq([])
+    end
+
+    it 'can return more records than previously requested' do
+      first_status  = Fabricate(:status, account: bob)
+      second_status = Fabricate(:status, thread: first_status, account: alice)
+      third_status = Fabricate(:status, thread: second_status, account: alice)
+
+      # Create cache
+      second_status.ancestors(1)
+
+      expect(third_status.ancestors(2)).to eq([first_status, second_status])
+    end
+
+    it 'can return fewer records than previously requested' do
+      first_status  = Fabricate(:status, account: bob)
+      second_status = Fabricate(:status, thread: first_status, account: alice)
+      third_status = Fabricate(:status, thread: second_status, account: alice)
+
+      # Create cache
+      second_status.ancestors(2)
+
+      expect(third_status.ancestors(1)).to eq([second_status])
+    end
+  end
+
+  describe '#descendants' do
+    let!(:alice)  { Fabricate(:account, username: 'alice') }
+    let!(:bob)    { Fabricate(:account, username: 'bob', domain: 'example.com') }
+    let!(:jeff)   { Fabricate(:account, username: 'jeff') }
+    let!(:status) { Fabricate(:status, account: alice) }
+    let!(:reply1) { Fabricate(:status, thread: status, account: alice) }
+    let!(:reply2) { Fabricate(:status, thread: status, account: bob) }
+    let!(:reply3) { Fabricate(:status, thread: reply1, account: jeff) }
+    let!(:viewer) { Fabricate(:account, username: 'viewer') }
+
+    it 'returns replies' do
+      expect(status.descendants(4)).to include(reply1, reply2, reply3)
+    end
+
+    it 'does not return replies user is not allowed to see' do
+      reply1.update(visibility: :private)
+      reply3.update(visibility: :direct)
+
+      expect(status.descendants(4, viewer)).to_not include(reply1, reply3)
+    end
+
+    it 'does not return replies from blocked users' do
+      viewer.block!(jeff)
+      expect(status.descendants(4, viewer)).to_not include(reply3)
+    end
+
+    it 'does not return replies from muted users' do
+      viewer.mute!(jeff)
+      expect(status.descendants(4, viewer)).to_not include(reply3)
+    end
+
+    it 'does not return replies from silenced and not followed users' do
+      jeff.silence!
+      expect(status.descendants(4, viewer)).to_not include(reply3)
+    end
+
+    it 'does not return replies from blocked domains' do
+      viewer.block_domain!('example.com')
+      expect(status.descendants(4, viewer)).to_not include(reply2)
+    end
+
+    it 'promotes self-replies to the top while leaving the rest in order' do
+      a = Fabricate(:status, account: alice)
+      d = Fabricate(:status, account: jeff, thread: a)
+      e = Fabricate(:status, account: bob, thread: d)
+      c = Fabricate(:status, account: alice, thread: a)
+      f = Fabricate(:status, account: bob, thread: c)
+
+      expect(a.descendants(20)).to eq [c, d, e, f]
+    end
+  end
+end

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