1 files changed, 15 insertions, 2 deletions
diff --git a/spec/ruby/optional/capi/float_spec.rb b/spec/ruby/optional/capi/float_spec.rb
index 8381945315..5b02483b28 100644
--- a/spec/ruby/optional/capi/float_spec.rb
+++ b/spec/ruby/optional/capi/float_spec.rb
@@ -23,8 +23,21 @@ describe "CApiFloatSpecs" do
   describe "rb_Float" do
     it "creates a new Float from a String" do
       f = @f.rb_Float("101.99")
-      f.should be_kind_of(Float)
-      f.should eql(101.99)
+      f.should.is_a?(Float)
+      f.should.eql?(101.99)
+    end
+  end
+
+  describe "RB_FLOAT_TYPE_P" do
+    it "returns true for floats" do
+      @f.RB_FLOAT_TYPE_P(2.0).should == true
+    end
+
+    it "returns false for non-floats" do
+      @f.RB_FLOAT_TYPE_P(nil).should == false
+      @f.RB_FLOAT_TYPE_P(10).should == false
+      @f.RB_FLOAT_TYPE_P("string").should == false
+      @f.RB_FLOAT_TYPE_P(Object.new).should == false
     end
   end
 end