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astuto/spec/models/follow_spec.rb

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require 'rails_helper'
RSpec.describe Follow, type: :model do
let(:follow) { FactoryBot.build(:follow) }
it 'is valid' do
expect(follow).to be_valid
end
it 'must have a user_id' do
follow.user = nil
expect(follow).to be_invalid
end
it 'must have a post_id' do
follow.post = nil
expect(follow).to be_invalid
end
it 'must be unique on user and post' do
follow
f = Follow.new(user_id: follow.user_id, post_id: follow.post_id)
expect(f).to be_invalid
end
end