test(current_example): add specs when gem is not loaded

spec/lib/convenient_service/service/plugins/can_have_stubbed_result/concern_spec.rb

@@ -33,7 +33,7 @@
 
   example_group "class methods" do
     describe ".stubbed_results" do
-      context "when `Rspec.current_example` is nil" do
+      context "when RSpec current example is NOT set" do
         before do
           allow(ConvenientService::Support::Gems::RSpec).to receive(:current_example).and_return(nil)
         end
@@ -43,7 +43,7 @@
         end
       end
 
-      context "when `Rspec.current_example` is present" do
+      context "when RSpec is loaded and current example is set" do
         it "returns cache scoped by self" do
           expect(service_class.stubbed_results).to eq(ConvenientService::Support::Cache.new.scope(service_class))
         end

spec/lib/convenient_service/support/gems/rspec_spec.rb

@@ -22,6 +22,22 @@
         end
       end
     end
+
+    describe "current_example" do
+      it "returns current_example" do |example|
+        expect(described_class.current_example).to eq(example)
+      end
+
+      context "when `RSpec` is NOT loaded" do
+        before do
+          allow(described_class).to receive(:loaded?).and_return(false)
+        end
+
+        it "returns nil" do
+          expect(described_class.current_example).to be_nil
+        end
+      end
+    end
   end
 end
 # rubocop:enable RSpec/NestedGroups