1 files changed, 36 insertions, 0 deletions
diff --git a/spec/ruby/core/regexp/fixed_encoding_spec.rb b/spec/ruby/core/regexp/fixed_encoding_spec.rb
new file mode 100644
index 0000000000..5d8b1c2860
--- /dev/null
+++ b/spec/ruby/core/regexp/fixed_encoding_spec.rb
@@ -0,0 +1,36 @@
+# -*- encoding: utf-8 -*-
+require_relative '../../spec_helper'
+
+describe "Regexp#fixed_encoding?" do
+  it "returns false by default" do
+    /needle/.fixed_encoding?.should == false
+  end
+
+  it "returns false if the 'n' modifier was supplied to the Regexp" do
+    /needle/n.fixed_encoding?.should == false
+  end
+
+  it "returns true if the 'u' modifier was supplied to the Regexp" do
+    /needle/u.fixed_encoding?.should == true
+  end
+
+  it "returns true if the 's' modifier was supplied to the Regexp" do
+    /needle/s.fixed_encoding?.should == true
+  end
+
+  it "returns true if the 'e' modifier was supplied to the Regexp" do
+    /needle/e.fixed_encoding?.should == true
+  end
+
+  it "returns true if the Regexp contains a \\u escape" do
+    /needle \u{8768}/.fixed_encoding?.should == true
+  end
+
+  it "returns true if the Regexp contains a UTF-8 literal" do
+    /文字化け/.fixed_encoding?.should == true
+  end
+
+  it "returns true if the Regexp was created with the Regexp::FIXEDENCODING option" do
+    Regexp.new("", Regexp::FIXEDENCODING).fixed_encoding?.should == true
+  end
+end