Improve presenter architecture

Signed-off-by: Rémy Coutable <remy@rymai.me>

2 files changed, 98 insertions, 0 deletions

diff --git a/spec/presenters/ci/build/presenter_spec.rb b/spec/presenters/ci/build/presenter_spec.rb
new file mode 100644
index 00000000000..ecab84dcbc9
--- /dev/null
+++ b/spec/presenters/ci/build/presenter_spec.rb
@@ -0,0 +1,75 @@
+require 'spec_helper'
+
+describe Ci::Build::Presenter do
+  let(:project) { create(:empty_project) }
+  let(:pipeline) { create(:ci_pipeline, project: project) }
+  let(:build) { create(:ci_build, pipeline: pipeline) }
+
+  subject do
+    described_class.new(build)
+  end
+
+  it 'inherits from Gitlab::View::Presenter::Delegated' do
+    expect(described_class.superclass).to eq(Gitlab::View::Presenter::Delegated)
+  end
+
+  describe '#initialize' do
+    it 'takes a build and optional params' do
+      expect { subject }.not_to raise_error
+    end
+
+    it 'exposes build' do
+      expect(subject.build).to eq(build)
+    end
+
+    it 'forwards missing methods to build' do
+      expect(subject.ref).to eq('master')
+    end
+  end
+
+  describe '#erased_by_user?' do
+    it 'takes a build and optional params' do
+      expect(subject).not_to be_erased_by_user
+    end
+  end
+
+  describe '#erased_by_name' do
+    context 'when build is not erased' do
+      before do
+        expect(build).to receive(:erased_by).and_return(nil)
+      end
+
+      it 'returns nil' do
+        expect(subject.erased_by_name).to be_nil
+      end
+    end
+    context 'when build is erased' do
+      before do
+        expect(build).to receive(:erased_by).twice.
+          and_return(double(:user, name: 'John Doe'))
+      end
+
+      it 'returns the name of the eraser' do
+        expect(subject.erased_by_name).to eq('John Doe')
+      end
+    end
+  end
+
+  describe 'quack like a Ci::Build permission-wise' do
+    context 'user is not allowed' do
+      let(:project) { create(:empty_project, public_builds: false) }
+
+      it 'returns false' do
+        expect(subject.can?(nil, :read_build)).to be_falsy
+      end
+    end
+
+    context 'user is allowed' do
+      let(:project) { create(:empty_project, :public) }
+
+      it 'returns true' do
+        expect(subject.can?(nil, :read_build)).to be_truthy
+      end
+    end
+  end
+end
diff --git a/spec/presenters/ci/variable/presenter_spec.rb b/spec/presenters/ci/variable/presenter_spec.rb
new file mode 100644
index 00000000000..b3afb2e2e33
--- /dev/null
+++ b/spec/presenters/ci/variable/presenter_spec.rb
@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe Ci::Variable::Presenter do
+  let(:variable) { double(:variable) }
+
+  subject do
+    described_class.new(variable)
+  end
+
+  it 'inherits from Gitlab::View::Presenter::Simple' do
+    expect(described_class.superclass).to eq(Gitlab::View::Presenter::Simple)
+  end
+
+  describe '#initialize' do
+    it 'takes a variable and optional params' do
+      expect { subject }.not_to raise_error
+    end
+
+    it 'exposes variable' do
+      expect(subject.variable).to eq(variable)
+    end
+  end
+end