Add missing specs for API::Entities::Ci

This commit adds missing specs for 2 entities exposed in our API:
- API::Entities::Ci::JobArtifactFile
- API::Entities::Ci::JobRequest::Dependency

spec/lib/api/entities/ci/job_artifact_file_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe API::Entities::Ci::JobArtifactFile do
+  let(:artifact_file) { instance_double(JobArtifactUploader, filename: 'ci_build_artifacts.zip', cached_size: 42) }
+  let(:entity) { described_class.new(artifact_file) }
+
+  subject { entity.as_json }
+
+  it 'returns the filename' do
+    expect(subject[:filename]).to eq('ci_build_artifacts.zip')
+  end
+
+  it 'returns the size' do
+    expect(subject[:size]).to eq(42)
+  end
+end

spec/lib/api/entities/ci/job_request/dependency_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe API::Entities::Ci::JobRequest::Dependency do
+  let(:job) { create(:ci_build, :artifacts) }
+  let(:entity) { described_class.new(job) }
+
+  subject { entity.as_json }
+
+  it 'returns the dependency id' do
+    expect(subject[:id]).to eq(job.id)
+  end
+
+  it 'returns the dependency name' do
+    expect(subject[:name]).to eq(job.name)
+  end
+
+  it 'returns the dependency token' do
+    expect(subject[:token]).to eq(job.token)
+  end
+
+  it 'returns the dependency artifacts_file', :aggregate_failures do
+    expect(subject[:artifacts_file][:filename]).to eq('ci_build_artifacts.zip')
+    expect(subject[:artifacts_file][:size]).to eq(job.artifacts_size)
+  end
+end