Adding spec for error mapper

lib/jsonapi_errors_handler/error_mapper.rb

@@ -1,11 +1,11 @@
 module JsonapiErrorsHandler
   class ErrorMapper
+    @@mapped_errors = {}
     def self.mapped_errors
       @@mapped_errors
     end
 
     def self.map_errors!(errors_hash={})
-      @@mapped_errors ||= {}
       @@mapped_errors.merge!(errors_hash)
     end
 

spec/error_mapper_spec.rb

@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+RSpec.describe JsonapiErrorsHandler::ErrorMapper do
+  describe '.mapped_errors' do
+    it 'returns all the current mapped errors' do
+      expect(described_class.mapped_errors).to eq({})
+    end
+  end
+
+  describe '.map_errors!' do
+    let(:errors_hash) { {'Error' => 'Invalid'} }
+
+    it 'merges errors_hash into the current errors' do
+      result = described_class.map_errors!(errors_hash)
+      expect(result['Error']).to eq 'Invalid'
+    end
+  end
+
+  describe '.mapped_errors?' do
+    it 'return false if the errors does not include a specific error' do
+      expect(described_class.mapped_error?('AnError')).to be false
+    end
+
+    it 'return true if the errors include a specific error' do
+      described_class.map_errors!({ 'Invalid' => 'Errors::Invalid'})
+      expect(described_class.mapped_error?('Errors::Invalid')).to be true
+    end
+  end
+end

spec/jsonapi_errors_handler_spec.rb

@@ -1,3 +1,5 @@
+require 'spec_helper'
+
 RSpec.describe JsonapiErrorsHandler do
   it "has a version number" do
     expect(JsonapiErrorsHandler::VERSION).not_to be nil