1 files changed, 33 insertions, 0 deletions
diff --git a/spec/ruby/core/float/negative_spec.rb b/spec/ruby/core/float/negative_spec.rb
new file mode 100644
index 0000000000..511d92ade6
--- /dev/null
+++ b/spec/ruby/core/float/negative_spec.rb
@@ -0,0 +1,33 @@
+require_relative '../../spec_helper'
+
+describe "Float#negative?" do
+  describe "on positive numbers" do
+    it "returns false" do
+      0.1.negative?.should be_false
+    end
+  end
+
+  describe "on zero" do
+    it "returns false" do
+      0.0.negative?.should be_false
+    end
+  end
+
+  describe "on negative zero" do
+    it "returns false" do
+      -0.0.negative?.should be_false
+    end
+  end
+
+  describe "on negative numbers" do
+    it "returns true" do
+      -0.1.negative?.should be_true
+    end
+  end
+
+  describe "on NaN" do
+    it "returns false" do
+      nan_value.negative?.should be_false
+    end
+  end
+end