Avoid RSpec 3 deprecation warning [close #327]

lib/guard/rspec_formatter.rb

@@ -33,10 +33,10 @@ def self.extract_spec_location(metadata)
       location = metadata[:location]
 
       until spec_path?(location)
-        metadata = metadata[:example_group]
+        metadata = metadata[:parent_example_group] || metadata[:example_group]
 
         unless metadata
-          STDERR.puts "no spec file found for #{root_metadata[:location]}"
+          STDERR.puts "no spec file location in #{root_metadata.inspect}"
           return root_metadata[:location]
         end
 

spec/lib/guard/rspec_formatter_spec.rb

@@ -145,13 +145,43 @@ def expected_output(spec_filename)
         }
 
         expect(STDERR).to receive(:puts).
-          with("no spec file found for #{metadata[:location]}") {}
+          with("no spec file location in #{metadata.inspect}")
 
         expect(described_class.extract_spec_location(metadata)).
           to eq metadata[:location]
       end
     end
 
+    context "when a shared examples are nested" do
+      it "should return location of the root spec" do
+        metadata = {
+          location: "./spec/support/breadcrumbs.rb:75",
+          example_group: {
+            example_group: {
+              location: "./spec/requests/breadcrumbs_spec.rb:218"
+            }
+          }
+        }
+
+        expect(described_class.extract_spec_location(metadata)).
+          to eq "./spec/requests/breadcrumbs_spec.rb"
+      end
+    end
+
+    context "when RSpec 3.0 metadata is present" do
+      it "should return location of the root spec" do
+        metadata = {
+          location: "./spec/support/breadcrumbs.rb:75",
+          parent_example_group: {
+            location: "./spec/requests/breadcrumbs_spec.rb:218"
+          }
+        }
+
+        expect(described_class.extract_spec_location(metadata)).
+          to eq "./spec/requests/breadcrumbs_spec.rb"
+      end
+    end
+
     context "with only success" do
       it "notifies success" do
         formatter.dump_summary(*summary_with_no_failures)