Complex#**: Share btw. 1.8 (lib) and 1.9 (core)

core/complex/exponent_spec.rb

@@ -0,0 +1,23 @@
+require File.dirname(__FILE__) + '/../../shared/complex/exponent'
+
+ruby_version_is "1.9" do
+  describe "Complex#** when given 0" do
+    it_behaves_like(:complex_exponent_zero, :**)
+  end
+
+  describe "Complex#** with Complex" do
+    it_behaves_like(:complex_exponent_complex, :**)
+  end
+
+  describe "Complex#** with Integer" do
+    it_behaves_like(:complex_exponent_integer, :**)
+  end
+
+  describe "Complex#** with Rational" do
+    it_behaves_like(:complex_exponent_rational, :**)
+  end
+
+  describe "Complex#** with Object" do
+    it_behaves_like(:complex_exponent_object, :**)
+  end
+end

library/complex/exponent_spec.rb

@@ -1,54 +1,25 @@
-require File.dirname(__FILE__) + '/../../spec_helper'
+require File.dirname(__FILE__) + '/../../shared/complex/exponent'
 require "complex"
 require "rational"
 
-describe "Complex#** when given 0" do
-  it "returns Complex(1)" do
-    (Complex(3, 4) ** 0).should eql(Complex(1))
-    (Complex(10, 20) ** 0.0).should eql(Complex(1))
+ruby_version_is ""..."1.9" do
+  describe "Complex#** when given 0" do
+    it_behaves_like(:complex_exponent_zero, :**)
   end
-end
 
-describe "Complex#** with Complex" do
-  it "returns self raised to the given power" do
-    (Complex(2, 1) ** Complex(2, 1)).should be_close(Complex(-0.504824688978319, 3.10414407699553), TOLERANCE)
-    (Complex(2, 1) ** Complex(3, 4)).should be_close(Complex(-0.179174656916581, -1.74071656397662), TOLERANCE)
-
-    (Complex(2, 1) ** Complex(-2, -1)).should be_close(Complex(-0.051041070450869, -0.313849223270419), TOLERANCE)
-    (Complex(-2, -1) ** Complex(2, 1)).should be_close(Complex(-11.6819929610857, 71.8320439736158), TOLERANCE)
+  describe "Complex#** with Complex" do
+    it_behaves_like(:complex_exponent_complex, :**)
   end
-end
-
-describe "Complex#** with Integer" do
-  it "returns self raised to the given power" do
-    (Complex(2, 1) ** 2).should == Complex(3, 4)
-    (Complex(3, 4) ** 2).should == Complex(-7, 24)
-    (Complex(3, 4) ** -2).should be_close(Complex(-0.0112, -0.0384), TOLERANCE)
-
-
-    (Complex(2, 1) ** 2.5).should be_close(Complex(2.99179707178602, 6.85206901006896), TOLERANCE)
-    (Complex(3, 4) ** 2.5).should be_close(Complex(-38.0, 41.0), TOLERANCE)
-    (Complex(3, 4) ** -2.5).should be_close(Complex(-0.01216, -0.01312), TOLERANCE)
 
-    # NOTE: Takes way too long...
-    #(Complex(2, 1) ** bignum_value)
+  describe "Complex#** with Integer" do
+    it_behaves_like(:complex_exponent_integer, :**)
   end
-end
 
-describe "Complex#** with Rational" do
-  it "returns self raised to the given power" do
-    (Complex(2, 1) ** Rational(3, 4)).should be_close(Complex(1.71913265276568, 0.623124744394697), TOLERANCE)
-    (Complex(2, 1) ** Rational(4, 3)).should be_close(Complex(2.3828547125173, 1.69466313833091), TOLERANCE)
-    (Complex(2, 1) ** Rational(-4, 3)).should be_close(Complex(0.278700377879388, -0.198209003071003), TOLERANCE)
+  describe "Complex#** with Rational" do
+    it_behaves_like(:complex_exponent_rational, :**)
   end
-end
 
-describe "Complex#** with Object" do
-  it "tries to coerce self into other" do
-    value = Complex(3, 9)
-
-    obj = mock("Object")
-    obj.should_receive(:coerce).with(value).and_return([2, 5])
-    (value ** obj).should == 2 ** 5
+  describe "Complex#** with Object" do
+    it_behaves_like(:complex_exponent_object, :**)
   end
-end
+end

shared/complex/exponent.rb

@@ -0,0 +1,52 @@
+require File.dirname(__FILE__) + '/../../spec_helper'
+
+describe :complex_exponent_zero, :shared => true do
+  it "returns Complex(1)" do
+    (Complex(3, 4) ** 0).should eql(Complex(1))
+    (Complex(10, 20) ** 0.0).should eql(Complex(1.0, 0.0))
+  end
+end
+
+describe :complex_exponent_complex, :shared => true do
+  it "returns self raised to the given power" do
+    (Complex(2, 1) ** Complex(2, 1)).should be_close(Complex(-0.504824688978319, 3.10414407699553), TOLERANCE)
+    (Complex(2, 1) ** Complex(3, 4)).should be_close(Complex(-0.179174656916581, -1.74071656397662), TOLERANCE)
+
+    (Complex(2, 1) ** Complex(-2, -1)).should be_close(Complex(-0.051041070450869, -0.313849223270419), TOLERANCE)
+    (Complex(-2, -1) ** Complex(2, 1)).should be_close(Complex(-11.6819929610857, 71.8320439736158), TOLERANCE)
+  end
+end
+
+describe :complex_exponent_integer, :shared => true do
+  it "returns self raised to the given power" do
+    (Complex(2, 1) ** 2).should == Complex(3, 4)
+    (Complex(3, 4) ** 2).should == Complex(-7, 24)
+    (Complex(3, 4) ** -2).should be_close(Complex(-0.0112, -0.0384), TOLERANCE)
+
+
+    (Complex(2, 1) ** 2.5).should be_close(Complex(2.99179707178602, 6.85206901006896), TOLERANCE)
+    (Complex(3, 4) ** 2.5).should be_close(Complex(-38.0, 41.0), TOLERANCE)
+    (Complex(3, 4) ** -2.5).should be_close(Complex(-0.01216, -0.01312), TOLERANCE)
+
+    # NOTE: Takes way too long...
+    #(Complex(2, 1) ** bignum_value)
+  end
+end
+
+describe :complex_exponent_rational, :shared => true do
+  it "returns self raised to the given power" do
+    (Complex(2, 1) ** Rational(3, 4)).should be_close(Complex(1.71913265276568, 0.623124744394697), TOLERANCE)
+    (Complex(2, 1) ** Rational(4, 3)).should be_close(Complex(2.3828547125173, 1.69466313833091), TOLERANCE)
+    (Complex(2, 1) ** Rational(-4, 3)).should be_close(Complex(0.278700377879388, -0.198209003071003), TOLERANCE)
+  end
+end
+
+describe :complex_exponent_object, :shared => true do
+  it "tries to coerce self into other" do
+    value = Complex(3, 9)
+
+    obj = mock("Object")
+    obj.should_receive(:coerce).with(value).and_return([2, 5])
+    (value ** obj).should == 2 ** 5
+  end
+end