1 files changed, 31 insertions, 0 deletions
diff --git a/spec/lib/unnested_in_filters/dsl_spec.rb b/spec/lib/unnested_in_filters/dsl_spec.rb
new file mode 100644
index 00000000000..bce4c88f94c
--- /dev/null
+++ b/spec/lib/unnested_in_filters/dsl_spec.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe UnnestedInFilters::Dsl do
+  let(:test_model) do
+    Class.new(ApplicationRecord) do
+      include UnnestedInFilters::Dsl
+
+      self.table_name = 'users'
+    end
+  end
+
+  describe '#exists?' do
+    let(:states) { %w(active banned) }
+
+    subject { test_model.where(state: states).use_unnested_filters.exists? }
+
+    context 'when there is no record in the database with given filters' do
+      it { is_expected.to be_falsey }
+    end
+
+    context 'when there is a record in the database with given filters' do
+      before do
+        create(:user, state: :active)
+      end
+
+      it { is_expected.to be_truthy }
+    end
+  end
+end