Add specs for persistence

spec/models/concerns/test_track/persistence_spec.rb

@@ -0,0 +1,81 @@
+require 'rails_helper'
+
+RSpec.describe TestTrack::Persistence do
+  let(:resource) do
+    Class.new do
+      include TestTrack::Resource
+      include TestTrack::Persistence
+
+      attribute :name
+      attribute :saved, default: false
+
+      validates :name, presence: true
+
+      private
+
+      def persist!
+        self.saved = true
+      end
+    end
+  end
+
+  before do
+    stub_const('FakeResource', resource)
+  end
+
+  describe '#save' do
+    subject { resource.new(name: 'foo') }
+
+    it 'saves' do
+      expect(subject).to be_valid
+      expect(subject.save).to be(true)
+      expect(subject.saved).to be(true)
+    end
+
+    it 'does not save an invalid resource' do
+      subject.name = ''
+      expect(subject).not_to be_valid
+      expect(subject.save).to be(false)
+      expect(subject.saved).to be(false)
+    end
+
+    it 'handles server errors' do
+      allow(subject).to receive(:persist!).and_raise(Faraday::UnprocessableEntityError, 'kaboom')
+
+      expect(subject).to be_valid
+      expect(subject.save).to be(false)
+      expect(subject.saved).to be(false)
+      expect(subject.errors[:base]).to include('could not be saved')
+    end
+  end
+
+  describe '#save!' do
+    let(:subject) { resource.new(name: 'foo') }
+
+    it 'returns true when the resource is successfully saved' do
+      expect(subject.save!).to be(true)
+    end
+
+    it 'raises ActiveModel::ValidationError the resource is not saved' do
+      subject.name = ''
+      expect { subject.save! }.to raise_error(ActiveModel::ValidationError)
+    end
+
+    it 'converts server errors to validation errors' do
+      allow(subject).to receive(:persist!).and_raise(Faraday::UnprocessableEntityError, 'kaboom')
+
+      expect { subject.save! }.to raise_error(ActiveModel::ValidationError)
+      expect(subject.errors[:base]).to include('could not be saved')
+    end
+  end
+
+  describe '.create!' do
+    it 'returns a new instance when the resource is successfully saved' do
+      expect(resource.create!(name: 'Foo')).to be_a(resource)
+    end
+
+    it 'raises ActiveModel::ValidationError the resource is not saved' do
+      expect { resource.create!(name: '') }.to raise_error(ActiveModel::ValidationError)
+    end
+  end
+end