Add TreeController and spec

spec/controllers/tree_controller_spec.rb

@@ -0,0 +1,43 @@
+require 'spec_helper'
+
+describe TreeController do
+  let(:project) { create(:project) }
+  let(:user)    { create(:user) }
+
+  before do
+    sign_in(user)
+
+    project.add_access(user, :read, :admin)
+
+    project.stub(:branches).and_return(['master', 'foo/bar/baz'])
+    project.stub(:tags).and_return(['v1.0.0', 'v2.0.0'])
+    controller.instance_variable_set(:@project, project)
+  end
+
+  describe "GET show" do
+    # Make sure any errors accessing the tree in our views bubble up to this spec
+    render_views
+
+    before { get :show, project_id: project.code, id: id }
+
+    context "valid branch, no path" do
+      let(:id) { 'master' }
+      it { should respond_with(:success) }
+    end
+
+    context "valid branch, valid path" do
+      let(:id) { 'master/README.md' }
+      it { should respond_with(:success) }
+    end
+
+    context "valid branch, invalid path" do
+      let(:id) { 'master/invalid-path.rb' }
+      it { should respond_with(:not_found) }
+    end
+
+    context "invalid branch, valid path" do
+      let(:id) { 'invalid-branch/README.md' }
+      it { should respond_with(:not_found) }
+    end
+  end
+end