4 files changed, 50 insertions, 0 deletions
diff --git a/spec/hashie/dash_spec.rb b/spec/hashie/dash_spec.rb
index 5f3bfe3..3adfc8f 100644
--- a/spec/hashie/dash_spec.rb
+++ b/spec/hashie/dash_spec.rb
@@ -606,3 +606,13 @@ context 'with method access' do
     it { is_expected.to eq true }
   end
 end
+
+RSpec.describe Hashie::Dash do
+  let(:test) do
+    Class.new(Hashie::Dash) do
+      property :description, default: ''
+    end
+  end
+
+  include_examples 'Dash default handling', :description
+end
diff --git a/spec/hashie/extensions/ignore_undeclared_spec.rb b/spec/hashie/extensions/ignore_undeclared_spec.rb
index 50c4f31..6f2d818 100644
--- a/spec/hashie/extensions/ignore_undeclared_spec.rb
+++ b/spec/hashie/extensions/ignore_undeclared_spec.rb
@@ -27,6 +27,18 @@ describe Hashie::Extensions::IgnoreUndeclared do
       hash = subject.new(city: 'Toronto')
       expect { hash.country = 'Canada' }.to raise_error(NoMethodError)
     end
+
+    context 'with a default value' do
+      let(:test) do
+        Class.new(Hashie::Trash) do
+          include Hashie::Extensions::IgnoreUndeclared
+
+          property :description, from: :desc, default: ''
+        end
+      end
+
+      include_examples 'Dash default handling', :description, :desc
+    end
   end
 
   context 'combined with DeepMerge' do
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 0bdf972..5ac288a 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -13,6 +13,8 @@ require './spec/support/ruby_version_check'
 require './spec/support/logger'
 require './spec/support/matchers'
 
+Dir[File.expand_path(File.join(__dir__, 'support', '**', '*'))].sort.each { |file| require file }
+
 RSpec.configure do |config|
   config.extend RubyVersionCheck
   config.expect_with :rspec do |expect|
diff --git a/spec/support/shared_examples.rb b/spec/support/shared_examples.rb
new file mode 100644
index 0000000..df05592
--- /dev/null
+++ b/spec/support/shared_examples.rb
@@ -0,0 +1,26 @@
+RSpec.shared_examples 'Dash default handling' do |property, name = property|
+  it 'uses the default when initializing' do
+    expect(test.new(name => nil).public_send(property)).to eq ''
+  end
+
+  it 'allows you to set the value to nil with the hash writer' do
+    trash = test.new(name => 'foo')
+    trash[name] = nil
+
+    expect(trash.public_send(property)).to be_nil
+  end
+
+  it 'allows you to set the value to nil with the method writer' do
+    trash = test.new(name => 'foo')
+    trash[name] = nil
+
+    expect(trash.public_send(property)).to be_nil
+  end
+
+  it 'uses the default when updating with defaults' do
+    trash = test.new(name => 'foo')
+    trash.update_attributes!(name => nil)
+
+    expect(trash.public_send(property)).to eq ''
+  end
+end