Allow timestamp assignment in stubbed models

lib/factory_bot/strategy/stub.rb

@@ -72,6 +72,10 @@ module FactoryBot
             def created_at
               @created_at ||= Time.now.in_time_zone
             end
+
+            def created_at=(date)
+              @created_at = date
+            end
           end
         end
 
@@ -83,6 +87,10 @@ module FactoryBot
             def updated_at
               @updated_at ||= Time.current
             end
+
+            def updated_at=(date)
+              @updated_at = date
+            end
           end
         end
       end

spec/acceptance/build_stubbed_spec.rb

@@ -179,6 +179,13 @@ describe "defaulting `created_at`" do
     expect { build_stubbed(:thing_without_timestamp, created_at: Time.now) }.
       to raise_error(NoMethodError, /created_at=/)
   end
+
+  it "allows assignment of created_at" do
+    stub = build_stubbed(:thing_with_timestamp)
+    expect(stub.created_at).to eq Time.now
+    stub.created_at = 3.days.ago
+    expect(stub.created_at).to eq 3.days.ago
+  end
 end
 
 describe "defaulting `updated_at`" do
@@ -215,6 +222,13 @@ describe "defaulting `updated_at`" do
       build_stubbed(:thing_without_timestamp, updated_at: Time.now)
     end.to raise_error(NoMethodError, /updated_at=/)
   end
+
+  it "allows assignment of updated_at" do
+    stub = build_stubbed(:thing_with_timestamp)
+    expect(stub.updated_at).to eq Time.now
+    stub.updated_at = 3.days.ago
+    expect(stub.updated_at).to eq 3.days.ago
+  end
 end
 
 describe "defaulting `id`" do