1 files changed, 43 insertions, 0 deletions
diff --git a/spec/ruby/core/numeric/negative_spec.rb b/spec/ruby/core/numeric/negative_spec.rb
new file mode 100644
index 0000000000..27e5c65fe3
--- /dev/null
+++ b/spec/ruby/core/numeric/negative_spec.rb
@@ -0,0 +1,43 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+ruby_version_is "2.3" do
+  describe "Numeric#negative?" do
+    describe "on positive numbers" do
+      it "returns false" do
+        1.negative?.should be_false
+        0.1.negative?.should be_false
+      end
+    end
+
+    describe "on zero" do
+      it "returns false" do
+        0.negative?.should be_false
+        0.0.negative?.should be_false
+      end
+    end
+
+    describe "on negative numbers" do
+      it "returns true" do
+        -1.negative?.should be_true
+        -0.1.negative?.should be_true
+      end
+    end
+  end
+
+  describe "Numeric#negative?" do
+    before(:each) do
+      @obj = NumericSpecs::Subclass.new
+    end
+
+    it "returns true if self is less than 0" do
+      @obj.should_receive(:<).with(0).and_return(true)
+      @obj.negative?.should == true
+    end
+
+    it "returns false if self is greater than 0" do
+      @obj.should_receive(:<).with(0).and_return(false)
+      @obj.negative?.should == false
+    end
+  end
+end