Adds `not_in?` onto Object

1 files changed, 53 insertions, 0 deletions

diff --git a/activesupport/test/core_ext/object/exclusion_test.rb b/activesupport/test/core_ext/object/exclusion_test.rb
new file mode 100644
index 0000000000..487c97d255
--- /dev/null
+++ b/activesupport/test/core_ext/object/exclusion_test.rb
@@ -0,0 +1,53 @@
+require 'abstract_unit'
+require 'active_support/core_ext/object/exclusion'
+
+class NotInTest < ActiveSupport::TestCase
+  def test_not_in_array
+    assert 1.not_in?([2, 3])
+    assert_not 2.not_in?([1,2])
+  end
+
+  def test_not_in_hash
+    h = { "a" => 100, "b" => 200 }
+    assert "z".not_in?(h)
+    assert_not "a".not_in?(h)
+  end
+
+  def test_not_in_string
+    assert "ol".not_in?("hello")
+    assert_not "lo".not_in?("hello")
+    assert ?z.not_in?("hello")
+  end
+
+  def test_not_in_range
+    assert 75.not_in?(1..50)
+    assert_not 25.not_in?(1..50)
+  end
+
+  def test_not_in_set
+    s = Set.new([1,2])
+    assert 3.not_in?(s)
+    assert_not 1.not_in?(s)
+  end
+
+  module A
+  end
+  class B
+    include A
+  end
+  class C < B
+  end
+  class D
+  end
+
+  def test_not_in_module
+    assert A.not_in?(D)
+    assert A.not_in?(A)
+    assert_not A.not_in?(B)
+    assert_not A.not_in?(C)
+  end
+
+  def test_no_method_catching
+    assert_raise(ArgumentError) { 1.not_in?(1) }
+  end
+end