1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb b/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb
new file mode 100644
index 0000000000..bc8a31dfa8
--- /dev/null
+++ b/spec/ruby/library/socket/addrinfo/ipv4_multicast_spec.rb
@@ -0,0 +1,27 @@
+require_relative '../spec_helper'
+
+describe "Addrinfo#ipv4_multicast?" do
+  it 'returns true for a multicast address' do
+    Addrinfo.ip('224.0.0.0').should.ipv4_multicast?
+    Addrinfo.ip('224.0.0.9').should.ipv4_multicast?
+    Addrinfo.ip('239.255.255.250').should.ipv4_multicast?
+  end
+
+  it 'returns false for a regular address' do
+    Addrinfo.ip('8.8.8.8').should_not.ipv4_multicast?
+  end
+
+  it 'returns false for an IPv6 address' do
+    Addrinfo.ip('::1').should_not.ipv4_multicast?
+  end
+
+  describe "for a unix socket" do
+    before :each do
+      @addrinfo = Addrinfo.unix("/tmp/sock")
+    end
+
+    it "returns false" do
+      @addrinfo.ipv4_multicast?.should == false
+    end
+  end
+end