Fixed problem when name of the trait was not a symbol

lib/factory_bot/factory_runner.rb

@@ -5,7 +5,7 @@ module FactoryBot
       @strategy = strategy
 
       @overrides = traits_and_overrides.extract_options!
-      @traits    = traits_and_overrides
+      @traits    = traits_and_overrides.map(&:to_sym)
     end
 
     def run(runner_strategy = @strategy, &block)

lib/factory_bot/trait.rb

@@ -4,7 +4,7 @@ module FactoryBot
     attr_reader :name, :definition
 
     def initialize(name, &block)
-      @name = name
+      @name = name.to_sym
       @block = block
       @definition = Definition.new(@name)
 

spec/acceptance/traits_spec.rb

@@ -24,6 +24,10 @@ describe "an instance generated by a factory with multiple traits" do
           admin { true }
         end
 
+        trait "admin_string" do
+          admin true
+        end
+
         trait :admin_trait do
           admin { true }
         end
@@ -165,6 +169,18 @@ describe "an instance generated by a factory with multiple traits" do
     its(:date_of_birth) { should eq Date.parse("1/1/2000") }
   end
 
+  context "when trait is defined as string" do
+    context "when is called as symbol" do
+      subject            { FactoryBot.create(:user, :admin_string) }
+      its(:admin)        { should be_truthy }
+    end
+
+    context "when is called as string" do
+      subject            { FactoryBot.create(:user, "admin_string") }
+      its(:admin)        { should be_truthy }
+    end
+  end
+
   context "factory outside of scope" do
     subject     { FactoryBot.create(:user_without_admin_scoping) }
     it { expect { subject }.to raise_error(ArgumentError, "Trait not registered: admin_trait") }