Refactoring: DRY up TwitterSync.preferences_cleanup spec

spec/lib/twitter_sync_spec.rb

@@ -2,74 +2,67 @@ require 'rails_helper'
 
 RSpec.describe TwitterSync do
   describe '.preferences_cleanup' do
-    describe 'sanitizing Twitter preferences' do
-      context 'when given as a bare hash' do
-        it 'automatically adds empty hashes at :geo and :place' do
-          expect(described_class.preferences_cleanup({}))
-            .to eq({ geo: {}, place: {} })
+    shared_examples 'for normalizing input' do
+      it 'is converted (from bare hash)' do
+        expect(described_class.preferences_cleanup(raw_preferences)).to include(clean_preferences)
       end
 
-        it 'does not modify values at :mention_ids' do
-          expect(described_class.preferences_cleanup({ mention_ids: [1_234_567_890] }))
-            .to include({ mention_ids: [1_234_567_890] })
-        end
-
-        it 'converts geo: instance_of(Twitter::NullOjbect) to empty hash' do
-          expect(described_class.preferences_cleanup({ geo: Twitter::NullObject.new }))
-            .to include(geo: {})
-        end
-
-        it 'converts geo: instance_of(Twitter::Geo.new) to matching hash' do
-          expect(described_class.preferences_cleanup({ geo: Twitter::Geo.new(coordinates: [1, 1]) }))
-            .to include(geo: { coordinates: [1, 1] })
-        end
-
-        it 'converts place: instance_of(Twitter::NullOjbect) to empty hash' do
-          expect(described_class.preferences_cleanup({ place: Twitter::NullObject.new }))
-            .to include(place: {})
-        end
-
-        it 'converts place: instance_of(Twitter::Place.new) to matching hash' do
-          place_data = { country: 'da', name: 'do', woeid: 1, id: 1 }
-
-          expect(described_class.preferences_cleanup({ place: Twitter::Place.new(place_data) }))
-            .to include(place: place_data)
+      it 'is converted (from article.preferences hash)' do
+        expect(described_class.preferences_cleanup(twitter: raw_preferences)).to match({ twitter: hash_including(clean_preferences) })
       end
     end
 
-      context 'when given nested in an article preferences hash' do
-        it 'automatically adds empty hashes at :geo and :place' do
-          expect(described_class.preferences_cleanup({ twitter: {} }))
-            .to eq(twitter: { geo: {}, place: {} })
+    describe ':geo key' do
+      context 'when absent' do
+        let(:raw_preferences) { {} }
+        let(:clean_preferences) { { geo: {} } }
+
+        include_examples 'for normalizing input'
       end
 
-        it 'does not modify values at :mention_ids' do
-          expect(described_class.preferences_cleanup({ twitter: { mention_ids: [1_234_567_890] } }))
-            .to include(twitter: hash_including(mention_ids: [1_234_567_890]))
+      context 'when instance_of(Twitter::NullOjbect)' do
+        let(:raw_preferences) { { geo: Twitter::NullObject.new } }
+        let(:clean_preferences) { { geo: {} } }
+
+        include_examples 'for normalizing input'
       end
 
-        it 'converts geo: instance_of(Twitter::NullOjbect) to empty hash' do
-          expect(described_class.preferences_cleanup({ twitter: { geo: Twitter::NullObject.new } }))
-            .to include(twitter: hash_including(geo: {}))
+      context 'when instance_of(Twitter::Geo.new)' do
+        let(:raw_preferences) { { geo: Twitter::Geo.new(coordinates: [1, 1]) } }
+        let(:clean_preferences) { { geo: { coordinates: [1, 1] } } }
+
+        include_examples 'for normalizing input'
+      end
     end
 
-        it 'converts geo: instance_of(Twitter::Geo.new) to matching hash' do
-          expect(described_class.preferences_cleanup({ twitter: { geo: Twitter::Geo.new(coordinates: [1, 1]) } }))
-            .to include(twitter: hash_including(geo: { coordinates: [1, 1] }))
+    describe ':place key' do
+      context 'when absent' do
+        let(:raw_preferences) { {} }
+        let(:clean_preferences) { { place: {} } }
+
+        include_examples 'for normalizing input'
       end
 
-        it 'converts place: instance_of(Twitter::NullOjbect) to empty hash' do
-          expect(described_class.preferences_cleanup({ twitter: { place: Twitter::NullObject.new } }))
-            .to include(twitter: hash_including(place: {}))
+      context 'when instance_of(Twitter::NullOjbect)' do
+        let(:raw_preferences) { { place: Twitter::NullObject.new } }
+        let(:clean_preferences) { { place: {} } }
+
+        include_examples 'for normalizing input'
       end
 
-        it 'converts place: instance_of(Twitter::Place.new) to matching hash' do
-          place_data = { country: 'da', name: 'do', woeid: 1, id: 1 }
+      context 'when instance_of(Twitter::Place.new)' do
+        let(:raw_preferences) { { place: Twitter::Place.new({ country: 'da', name: 'do', woeid: 1, id: 1 }) } }
+        let(:clean_preferences) { { place: { country: 'da', name: 'do', woeid: 1, id: 1 } } }
 
-          expect(described_class.preferences_cleanup({ twitter: { place: Twitter::Place.new(place_data) } }))
-            .to include(twitter: hash_including(place: place_data))
-        end
-      end
+        include_examples 'for normalizing input'
+      end
+    end
+
+    describe ':mention_ids key' do
+      let(:raw_preferences) { { mention_ids: [1_234_567_890] } }
+      let(:clean_preferences) { { mention_ids: [1_234_567_890] } }
+
+      include_examples 'for normalizing input'
     end
   end
 end