1 files changed, 30 insertions, 0 deletions
diff --git a/spec/ruby/core/string/equal_value_spec.rb b/spec/ruby/core/string/equal_value_spec.rb
new file mode 100644
index 0000000000..e8b706c524
--- /dev/null
+++ b/spec/ruby/core/string/equal_value_spec.rb
@@ -0,0 +1,30 @@
+require_relative '../../spec_helper'
+require_relative 'shared/eql'
+
+describe "String#==" do
+  it_behaves_like :string_eql_value, :==
+
+  it "returns false if obj does not respond to to_str" do
+    ('hello' == 5).should == false
+    not_supported_on :opal do
+      ('hello' == :hello).should == false
+    end
+    ('hello' == mock('x')).should == false
+  end
+
+  it "returns obj == self if obj responds to to_str" do
+    obj = Object.new
+
+    # String#== merely checks if #to_str is defined. It does
+    # not call it.
+    obj.stub!(:to_str)
+
+    obj.should_receive(:==).and_return(true)
+
+    ('hello' == obj).should == true
+  end
+
+  it "is not fooled by NUL characters" do
+    ("abc\0def" == "abc\0xyz").should == false
+  end
+end