Convert more API specs from controller->request style (#29004)

spec/requests/api/v1/conversations_spec.rb

@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'API V1 Conversations' do
+  let!(:user) { Fabricate(:user, account_attributes: { username: 'alice' }) }
+  let(:scopes) { 'read:statuses' }
+  let(:token)   { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
+  let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
+
+  let(:other) { Fabricate(:user) }
+
+  describe 'GET /api/v1/conversations', :sidekiq_inline do
+    before do
+      PostStatusService.new.call(other.account, text: 'Hey @alice', visibility: 'direct')
+      PostStatusService.new.call(user.account, text: 'Hey, nobody here', visibility: 'direct')
+    end
+
+    it 'returns pagination headers', :aggregate_failures do
+      get '/api/v1/conversations', params: { limit: 1 }, headers: headers
+
+      expect(response).to have_http_status(200)
+      expect(response.headers['Link'].links.size).to eq(2)
+    end
+
+    it 'returns conversations', :aggregate_failures do
+      get '/api/v1/conversations', headers: headers
+
+      expect(body_as_json.size).to eq 2
+      expect(body_as_json[0][:accounts].size).to eq 1
+    end
+
+    context 'with since_id' do
+      context 'when requesting old posts' do
+        it 'returns conversations' do
+          get '/api/v1/conversations', params: { since_id: Mastodon::Snowflake.id_at(1.hour.ago, with_random: false) }, headers: headers
+
+          expect(body_as_json.size).to eq 2
+        end
+      end
+
+      context 'when requesting posts in the future' do
+        it 'returns no conversation' do
+          get '/api/v1/conversations', params: { since_id: Mastodon::Snowflake.id_at(1.hour.from_now, with_random: false) }, headers: headers
+
+          expect(body_as_json.size).to eq 0
+        end
+      end
+    end
+  end
+end