1 files changed, 25 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/not_match_spec.rb b/spec/ruby/core/kernel/not_match_spec.rb
new file mode 100644
index 0000000000..4ed7ea7b42
--- /dev/null
+++ b/spec/ruby/core/kernel/not_match_spec.rb
@@ -0,0 +1,25 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Kernel#!~" do
+  class KernelSpecs::NotMatch
+    def !~(obj)
+      :foo
+    end
+  end
+
+  it 'calls =~ internally and negates the result' do
+    obj = Object.new
+    obj.should_receive(:=~).and_return(true)
+    (obj !~ :foo).should == false
+  end
+
+  it "raises NoMethodError if self does not respond to #=~" do
+    -> { Object.new !~ :foo }.should.raise(NoMethodError)
+  end
+
+  it 'can be overridden in subclasses' do
+    obj = KernelSpecs::NotMatch.new
+    (obj !~ :bar).should == :foo
+  end
+end