Add tests for SDG::ProcessEnabled model

We were testing it through other models, but unit tests help when
changing the code of this class.

Co-Authored-By: Javi Martín <javim@elretirao.net>

spec/models/sdg/process_enabled_spec.rb

@@ -0,0 +1,69 @@
+require "rails_helper"
+
+describe SDG::ProcessEnabled do
+  describe "#enabled?" do
+    context "SDG feature and namespace are enabled" do
+      before do
+        Setting["feature.sdg"] = true
+        %w[debates proposals polls budgets legislation].each do |process_name|
+          Setting["sdg.process.#{process_name}"] = true
+        end
+      end
+
+      it "returns true with relatable records" do
+        SDG::Related::RELATABLE_TYPES.each do |relatable_type|
+          process = SDG::ProcessEnabled.new(relatable_type.constantize.new)
+
+          expect(process).to be_enabled
+        end
+      end
+
+      it "returns true with relatable class names" do
+        SDG::Related::RELATABLE_TYPES.each do |relatable_type|
+          process = SDG::ProcessEnabled.new(relatable_type)
+
+          expect(process).to be_enabled
+        end
+      end
+
+      it "returns true with relatable controller paths" do
+        process = SDG::ProcessEnabled.new("budgets/investments")
+
+        expect(process).to be_enabled
+      end
+    end
+
+    context "SDG feature is disabled" do
+      before do
+        Setting["feature.sdg"] = false
+        Setting["sdg.process.debates"] = true
+      end
+
+      it "returns false" do
+        expect(SDG::ProcessEnabled.new(build(:debate))).not_to be_enabled
+        expect(SDG::ProcessEnabled.new("Debate")).not_to be_enabled
+        expect(SDG::ProcessEnabled.new("debates")).not_to be_enabled
+      end
+    end
+
+    context "Some SDG processes are disabled" do
+      before do
+        Setting["feature.sdg"] = true
+        Setting["sdg.process.debates"] = true
+        Setting["sdg.process.proposals"] = false
+      end
+
+      it "returns false for disabled processes" do
+        expect(SDG::ProcessEnabled.new(build(:proposal))).not_to be_enabled
+        expect(SDG::ProcessEnabled.new("Proposal")).not_to be_enabled
+        expect(SDG::ProcessEnabled.new("proposals")).not_to be_enabled
+      end
+
+      it "returns true for enabled processes" do
+        expect(SDG::ProcessEnabled.new(build(:debate))).to be_enabled
+        expect(SDG::ProcessEnabled.new("Debate")).to be_enabled
+        expect(SDG::ProcessEnabled.new("debates")).to be_enabled
+      end
+    end
+  end
+end