1 files changed, 51 insertions, 0 deletions
diff --git a/spec/models/concerns/nullify_if_blank_spec.rb b/spec/models/concerns/nullify_if_blank_spec.rb
new file mode 100644
index 00000000000..2d1bdba39dd
--- /dev/null
+++ b/spec/models/concerns/nullify_if_blank_spec.rb
@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe NullifyIfBlank do
+  let_it_be(:model) do
+    Class.new(ApplicationRecord) do
+      include NullifyIfBlank
+
+      nullify_if_blank :name
+
+      self.table_name = 'users'
+    end
+  end
+
+  context 'attribute exists' do
+    let(:instance) { model.new(name: name) }
+
+    subject { instance.name }
+
+    before do
+      instance.validate
+    end
+
+    context 'attribute is blank' do
+      let(:name) { '' }
+
+      it { is_expected.to be_nil }
+    end
+
+    context 'attribute is nil' do
+      let(:name) { nil }
+
+      it { is_expected.to be_nil}
+    end
+
+    context 'attribute is not blank' do
+      let(:name) { 'name' }
+
+      it { is_expected.to eq('name') }
+    end
+  end
+
+  context 'attribute does not exist' do
+    before do
+      model.table_name = 'issues'
+    end
+
+    it { expect { model.new.valid? }.to raise_error(ActiveModel::UnknownAttributeError) }
+  end
+end