added unexpose method

Author: jonmchan

.rubocop_todo.yml

@@ -12,7 +12,7 @@ Metrics/AbcSize:
 # Offense count: 1
 # Configuration parameters: CountComments.
 Metrics/ClassLength:
-  Max: 296
+  Max: 300
 
 # Offense count: 4
 Metrics/CyclomaticComplexity:

lib/grape_entity/entity.rb

@@ -158,6 +158,10 @@ def self.expose(*args, &block)
       end
     end
 
+    def self.unexpose(attribute)
+      exposures.delete(attribute)
+    end
+
     # Set options that will be applied to any exposures declared inside the block.
     #
     # @example Multi-exposure if

spec/grape_entity/entity_spec.rb

@@ -278,6 +278,48 @@ class Parent < Person
       end
     end
 
+    describe '.unexpose' do
+      it 'is able to remove exposed attributes' do
+        subject.expose :name, :email
+        subject.unexpose :email
+
+        expect(subject.exposures).to eq(name: {})
+      end
+
+      context 'inherited exposures' do
+        it 'when called from child class, only removes from the attribute from child' do
+          subject.expose :name, :email
+          child_class = Class.new(subject)
+          child_class.unexpose :email
+
+          expect(child_class.exposures).to eq(name: {})
+          expect(subject.exposures).to eq(name: {}, email: {})
+        end
+
+        # the following 2 behaviors are testing because it is not most intuitive and could be confusing
+        context 'when  called from the parent class' do
+          it 'remove from parent and all child classes that have not locked down their attributes with an .exposures call' do
+            subject.expose :name, :email
+            child_class = Class.new(subject)
+            subject.unexpose :email
+
+            expect(subject.exposures).to eq(name: {})
+            expect(child_class.exposures).to eq(name: {})
+          end
+
+          it 'remove from parent and do not remove from child classes that have locked down their attributes with an .exposures call' do
+            subject.expose :name, :email
+            child_class = Class.new(subject)
+            child_class.exposures
+            subject.unexpose :email
+
+            expect(subject.exposures).to eq(name: {})
+            expect(child_class.exposures).to eq(name: {}, email: {})
+          end
+        end
+      end
+    end
+
     describe '.with_options' do
       it 'raises an error for unknown options' do
         block = proc do