1 files changed, 17 insertions, 0 deletions
diff --git a/spec/ruby/library/mathn/fixnum/exponent_spec.rb b/spec/ruby/library/mathn/fixnum/exponent_spec.rb
new file mode 100644
index 0000000000..d72bc5aa00
--- /dev/null
+++ b/spec/ruby/library/mathn/fixnum/exponent_spec.rb
@@ -0,0 +1,17 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+ruby_version_is ''...'2.5' do
+  require 'mathn'
+
+  describe "Fixnum#**" do
+    it "returns self raised to other (positive) power" do
+      (2 ** 4).should == 16
+      (2 ** 1.2).should be_close(2.2973967, TOLERANCE)
+    end
+
+    it "returns a complex number when negative and raised to a fractional power" do
+      ((-8) ** (1/3)).should be_close(Complex(1, 1.73205), TOLERANCE)
+      ((-8) ** (1.0/3)).should be_close(Complex(1, 1.73205), TOLERANCE)
+    end
+  end
+end