1 files changed, 58 insertions, 1 deletions
diff --git a/spec/ruby/optional/capi/regexp_spec.rb b/spec/ruby/optional/capi/regexp_spec.rb
index 52aae6bb01..f233b5e3b3 100644
--- a/spec/ruby/optional/capi/regexp_spec.rb
+++ b/spec/ruby/optional/capi/regexp_spec.rb
@@ -9,12 +9,20 @@ describe "C-API Regexp function" do
 
   describe "rb_reg_new" do
     it "returns a new valid Regexp" do
-      my_re = @p.a_re
+      my_re = @p.a_re("a", 0)
       my_re.kind_of?(Regexp).should == true
       ('1a' =~ my_re).should == 1
       ('1b' =~ my_re).should == nil
       my_re.source.should == 'a'
     end
+
+    it "returns a Regexp with the given options" do
+      @p.a_re("a", 0).options == 0
+      @p.a_re("a", Regexp::IGNORECASE).options.should == Regexp::IGNORECASE
+      @p.a_re("a", Regexp::EXTENDED).options.should == Regexp::EXTENDED
+      @p.a_re("a", Regexp::EXTENDED | Regexp::IGNORECASE).options.should == Regexp::EXTENDED | Regexp::IGNORECASE
+      @p.a_re("a", Regexp::MULTILINE).options.should == Regexp::MULTILINE
+    end
   end
 
   describe "rb_reg_nth_match" do
@@ -67,5 +75,54 @@ describe "C-API Regexp function" do
       md = /c/.match('ab')
       @p.rb_backref_get.should == md
     end
+
+    it "returns MatchData when used with rb_reg_match" do
+      @p.rb_reg_match_backref_get(/a/, 'ab')[0].should == 'a'
+    end
+  end
+
+  describe "rb_backref_set" do
+    before :each do
+      @md = "foo".match(/foo/)
+      $~ = nil
+    end
+
+    it "sets the value of $~" do
+      @p.rb_backref_set(@md)
+      @p.rb_backref_get.should == @md
+      $~.should == @md
+    end
+
+    it "sets a Thread-local value" do
+      running = false
+
+      thr = Thread.new do
+        @p.rb_backref_set(@md)
+        @p.rb_backref_get.should == @md
+        $~.should == @md
+        running = true
+      end
+
+      Thread.pass while thr.status and !running
+      $~.should == nil
+
+      thr.join
+    end
+  end
+
+  describe "rb_memcicmp" do
+    it "returns 0 for identical strings" do
+      @p.rb_memcicmp('Hello', 'Hello').should == 0
+    end
+
+    it "returns 0 for strings which only differ in case" do
+      @p.rb_memcicmp('Hello', 'HELLO').should == 0
+      @p.rb_memcicmp('HELLO', 'Hello').should == 0
+    end
+
+    it "returns the difference between the first non matching characters" do
+      @p.rb_memcicmp('Hello', 'HELLP').should == -1
+      @p.rb_memcicmp('HELLp', 'Hello').should == 1
+    end
   end
 end