1 files changed, 87 insertions, 0 deletions
diff --git a/spec/models/evidence_spec.rb b/spec/models/evidence_spec.rb
new file mode 100644
index 00000000000..00788c2c391
--- /dev/null
+++ b/spec/models/evidence_spec.rb
@@ -0,0 +1,87 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Evidence do
+  let_it_be(:project) { create(:project) }
+  let(:release) { create(:release, project: project) }
+  let(:schema_file) { 'evidences/evidence' }
+  let(:summary_json) { described_class.last.summary.to_json }
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:release) }
+  end
+
+  describe 'summary_sha' do
+    it 'returns nil if summary is nil' do
+      expect(build(:evidence, summary: nil).summary_sha).to be_nil
+    end
+  end
+
+  describe '#generate_summary_and_sha' do
+    before do
+      described_class.create!(release: release)
+    end
+
+    context 'when a release name is not provided' do
+      let(:release) { create(:release, project: project, name: nil) }
+
+      it 'creates a valid JSON object' do
+        expect(release.name).to be_nil
+        expect(summary_json).to match_schema(schema_file)
+      end
+    end
+
+    context 'when a release is associated to a milestone' do
+      let(:milestone) { create(:milestone, project: project) }
+      let(:release) { create(:release, project: project, milestones: [milestone]) }
+
+      context 'when a milestone has no issue associated with it' do
+        it 'creates a valid JSON object' do
+          expect(milestone.issues).to be_empty
+          expect(summary_json).to match_schema(schema_file)
+        end
+      end
+
+      context 'when a milestone has no description' do
+        let(:milestone) { create(:milestone, project: project, description: nil) }
+
+        it 'creates a valid JSON object' do
+          expect(milestone.description).to be_nil
+          expect(summary_json).to match_schema(schema_file)
+        end
+      end
+
+      context 'when a milestone has no due_date' do
+        let(:milestone) { create(:milestone, project: project, due_date: nil) }
+
+        it 'creates a valid JSON object' do
+          expect(milestone.due_date).to be_nil
+          expect(summary_json).to match_schema(schema_file)
+        end
+      end
+
+      context 'when a milestone has an issue' do
+        context 'when the issue has no description' do
+          let(:issue) { create(:issue, project: project, description: nil, state: 'closed') }
+
+          before do
+            milestone.issues << issue
+          end
+
+          it 'creates a valid JSON object' do
+            expect(milestone.issues.first.description).to be_nil
+            expect(summary_json).to match_schema(schema_file)
+          end
+        end
+      end
+    end
+
+    context 'when a release is not associated to any milestone' do
+      it 'creates a valid JSON object' do
+        expect(release.milestones).to be_empty
+        expect(summary_json).to match_schema(schema_file)
+      end
+    end
+  end
+end