1 files changed, 38 insertions, 0 deletions
diff --git a/spec/serializers/ci/daily_build_group_report_result_serializer_spec.rb b/spec/serializers/ci/daily_build_group_report_result_serializer_spec.rb
new file mode 100644
index 00000000000..4a781971ae0
--- /dev/null
+++ b/spec/serializers/ci/daily_build_group_report_result_serializer_spec.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Ci::DailyBuildGroupReportResultSerializer do
+  let(:report_result) do
+    [
+      double(date: '2020-05-20', group_name: 'rspec', data: { 'coverage' => 79.1 }),
+      double(date: '2020-05-20', group_name: 'karma', data: { 'coverage' => 90.1 }),
+      double(date: '2020-05-19', group_name: 'rspec', data: { 'coverage' => 77.1 }),
+      double(date: '2020-05-19', group_name: 'karma', data: { 'coverage' => 89.1 })
+    ]
+  end
+  let(:serializer) { described_class.new.represent(report_result, param_type: 'coverage') }
+
+  describe '#to_json' do
+    let(:json) { Gitlab::Json.parse(serializer.to_json) }
+
+    it 'returns an array of group results' do
+      expect(json).to eq([
+        {
+          'group_name' => 'rspec',
+          'data' => [
+            { 'date' => '2020-05-20', 'coverage' => 79.1 },
+            { 'date' => '2020-05-19', 'coverage' => 77.1 }
+          ]
+        },
+        {
+          'group_name' => 'karma',
+          'data' => [
+            { 'date' => '2020-05-20', 'coverage' => 90.1 },
+            { 'date' => '2020-05-19', 'coverage' => 89.1 }
+          ]
+        }
+      ])
+    end
+  end
+end