Spec AccountDomainBlock (#3816)

spec/models/account_domain_block_spec.rb

@@ -1,5 +1,22 @@
 require 'rails_helper'
 
 RSpec.describe AccountDomainBlock, type: :model do
+  it 'removes blocking cache after creation' do
+    account = Fabricate(:account)
+    Rails.cache.write("exclude_domains_for:#{account.id}", 'a.domain.already.blocked')
 
+    AccountDomainBlock.create!(account: account, domain: 'a.domain.blocked.later')
+
+    expect(Rails.cache.exist?("exclude_domains_for:#{account.id}")).to eq false
+  end
+
+  it 'removes blocking cache after destruction' do
+    account = Fabricate(:account)
+    block = AccountDomainBlock.create!(account: account, domain: 'domain')
+    Rails.cache.write("exclude_domains_for:#{account.id}", 'domain')
+
+    block.destroy!
+
+    expect(Rails.cache.exist?("exclude_domains_for:#{account.id}")).to eq false
+  end
 end