1 files changed, 15 insertions, 0 deletions
diff --git a/spec/ruby/core/float/exponent_spec.rb b/spec/ruby/core/float/exponent_spec.rb
new file mode 100644
index 0000000000..5cbba43a27
--- /dev/null
+++ b/spec/ruby/core/float/exponent_spec.rb
@@ -0,0 +1,15 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Float#**" do
+  it "returns self raise to the other power" do
+    (2.3 ** 3).should be_close(12.167,TOLERANCE)
+    (5.2 ** -1).should be_close(0.192307692307692,TOLERANCE)
+    (9.5 ** 0.5).should be_close(3.08220700148449, TOLERANCE)
+    (9.5 ** 0xffffffff).to_s.should == 'Infinity'
+  end
+
+  it "returns a complex number when negative and raised to a fractional power" do
+    ((-8.0) ** (1.0/3))      .should be_close(Complex(1, 1.73205), TOLERANCE)
+    ((-8.0) ** Rational(1,3)).should be_close(Complex(1, 1.73205), TOLERANCE)
+  end
+end