1 files changed, 58 insertions, 0 deletions
diff --git a/spec/hashie/extensions/dash/predefined_values_spec.rb b/spec/hashie/extensions/dash/predefined_values_spec.rb
new file mode 100644
index 0000000..a84fe80
--- /dev/null
+++ b/spec/hashie/extensions/dash/predefined_values_spec.rb
@@ -0,0 +1,58 @@
+require 'spec_helper'
+
+describe Hashie::Extensions::Dash::PredefinedValues do
+  let(:extended_dash) do
+    Class.new(Hashie::Dash) do
+      include Hashie::Extensions::Dash::PredefinedValues
+
+      property :gender, values: %i[male female prefer_not_to_say]
+      property :age, values: (0..150)
+    end
+  end
+
+  it 'allows value within the predefined list' do
+    valid_dash = extended_dash.new(gender: :male)
+    expect(valid_dash.gender).to eq(:male)
+  end
+
+  it 'rejects value outside the predefined list' do
+    expect { extended_dash.new(gender: :unicorn) }
+      .to raise_error(ArgumentError, %(Invalid value for property 'gender'))
+  end
+
+  it 'accepts a range for predefined list' do
+    expect { extended_dash.new(age: -1) }
+      .to raise_error(ArgumentError, %(Invalid value for property 'age'))
+  end
+
+  it 'allows property to be nil' do
+    expect { extended_dash.new }
+      .not_to raise_error
+  end
+
+  it 'rejects non array or range for predefined list' do
+    expect do
+      class DashWithUnsupportedValueType < Hashie::Dash
+        include Hashie::Extensions::Dash::PredefinedValues
+
+        property :name, values: -> { :foo }
+      end
+    end.to raise_error(ArgumentError, %(`values` accepts an Array or a Range.))
+  end
+
+  let(:subclass) do
+    Class.new(extended_dash) do
+      property :language, values: %i[ruby javascript]
+    end
+  end
+
+  it 'passes property predefined list to subclasses' do
+    expect { subclass.new(gender: :unicorn) }
+      .to raise_error(ArgumentError, %(Invalid value for property 'gender'))
+  end
+
+  it 'allows subclass to define predefined list' do
+    expect { subclass.new(language: :ruby) }
+      .not_to raise_error
+  end
+end