1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/core/string/shared/eql.rb b/spec/ruby/core/string/shared/eql.rb
new file mode 100644
index 0000000000..d5af337d53
--- /dev/null
+++ b/spec/ruby/core/string/shared/eql.rb
@@ -0,0 +1,38 @@
+# encoding: binary
+require_relative '../../../spec_helper'
+require_relative '../fixtures/classes'
+
+describe :string_eql_value, shared: true do
+  it "returns true if self <=> string returns 0" do
+    'hello'.send(@method, 'hello').should be_true
+  end
+
+  it "returns false if self <=> string does not return 0" do
+    "more".send(@method, "MORE").should be_false
+    "less".send(@method, "greater").should be_false
+  end
+
+  it "ignores encoding difference of compatible string" do
+    "hello".dup.force_encoding("utf-8").send(@method, "hello".dup.force_encoding("iso-8859-1")).should be_true
+  end
+
+  it "considers encoding difference of incompatible string" do
+    "\xff".dup.force_encoding("utf-8").send(@method, "\xff".dup.force_encoding("iso-8859-1")).should be_false
+  end
+
+  it "considers encoding compatibility" do
+    "abcd".dup.force_encoding("utf-8").send(@method, "abcd".dup.force_encoding("utf-32le")).should be_false
+  end
+
+  it "ignores subclass differences" do
+    a = "hello"
+    b = StringSpecs::MyString.new("hello")
+
+    a.send(@method, b).should be_true
+    b.send(@method, a).should be_true
+  end
+
+  it "returns true when comparing 2 empty strings but one is not ASCII-compatible" do
+    "".send(@method, "".dup.force_encoding('iso-2022-jp')).should == true
+  end
+end