1 files changed, 101 insertions, 0 deletions
diff --git a/spec/lib/gitlab/danger/roulette_spec.rb b/spec/lib/gitlab/danger/roulette_spec.rb
new file mode 100644
index 00000000000..40dce0c5378
--- /dev/null
+++ b/spec/lib/gitlab/danger/roulette_spec.rb
@@ -0,0 +1,101 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'webmock/rspec'
+
+require 'gitlab/danger/roulette'
+
+describe Gitlab::Danger::Roulette do
+  let(:teammate_json) do
+    <<~JSON
+    [
+      {
+        "username": "in-gitlab-ce",
+        "name": "CE maintainer",
+        "projects":{ "gitlab-ce": "maintainer backend" }
+      },
+      {
+        "username": "in-gitlab-ee",
+        "name": "EE reviewer",
+        "projects":{ "gitlab-ee": "reviewer frontend" }
+      }
+    ]
+    JSON
+  end
+
+  let(:ce_teammate_matcher) do
+    satisfy do |teammate|
+      teammate.username == 'in-gitlab-ce' &&
+        teammate.name == 'CE maintainer' &&
+        teammate.projects == { 'gitlab-ce' => 'maintainer backend' }
+    end
+  end
+
+  let(:ee_teammate_matcher) do
+    satisfy do |teammate|
+      teammate.username == 'in-gitlab-ee' &&
+        teammate.name == 'EE reviewer' &&
+        teammate.projects == { 'gitlab-ee' => 'reviewer frontend' }
+    end
+  end
+
+  subject(:roulette) { Object.new.extend(described_class) }
+
+  describe '#team' do
+    subject(:team) { roulette.team }
+
+    context 'HTTP failure' do
+      before do
+        WebMock
+          .stub_request(:get, described_class::ROULETTE_DATA_URL)
+          .to_return(status: 404)
+      end
+
+      it 'raises a pretty error' do
+        expect { team }.to raise_error(/Failed to read/)
+      end
+    end
+
+    context 'JSON failure' do
+      before do
+        WebMock
+          .stub_request(:get, described_class::ROULETTE_DATA_URL)
+          .to_return(body: 'INVALID JSON')
+      end
+
+      it 'raises a pretty error' do
+        expect { team }.to raise_error(/Failed to parse/)
+      end
+    end
+
+    context 'success' do
+      before do
+        WebMock
+          .stub_request(:get, described_class::ROULETTE_DATA_URL)
+          .to_return(body: teammate_json)
+      end
+
+      it 'returns an array of teammates' do
+        is_expected.to contain_exactly(ce_teammate_matcher, ee_teammate_matcher)
+      end
+
+      it 'memoizes the result' do
+        expect(team.object_id).to eq(roulette.team.object_id)
+      end
+    end
+  end
+
+  describe '#project_team' do
+    subject { roulette.project_team('gitlab-ce') }
+
+    before do
+      WebMock
+        .stub_request(:get, described_class::ROULETTE_DATA_URL)
+        .to_return(body: teammate_json)
+    end
+
+    it 'filters team by project_name' do
+      is_expected.to contain_exactly(ce_teammate_matcher)
+    end
+  end
+end