1 files changed, 30 insertions, 0 deletions
diff --git a/activerecord/test/cases/arel/nodes/not_test.rb b/activerecord/test/cases/arel/nodes/not_test.rb
new file mode 100644
index 0000000000..15f94a6f10
--- /dev/null
+++ b/activerecord/test/cases/arel/nodes/not_test.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+require_relative '../helper'
+
+module Arel
+  module Nodes
+    describe 'not' do
+      describe '#not' do
+        it 'makes a NOT node' do
+          attr = Table.new(:users)[:id]
+          expr  = attr.eq(10)
+          node  = expr.not
+          node.must_be_kind_of Not
+          node.expr.must_equal expr
+        end
+      end
+
+      describe 'equality' do
+        it 'is equal with equal ivars' do
+          array = [Not.new('foo'), Not.new('foo')]
+          assert_equal 1, array.uniq.size
+        end
+
+        it 'is not equal with different ivars' do
+          array = [Not.new('foo'), Not.new('baz')]
+          assert_equal 2, array.uniq.size
+        end
+      end
+    end
+  end
+end