1 files changed, 16 insertions, 2 deletions
diff --git a/spec/ruby/core/complex/polar_spec.rb b/spec/ruby/core/complex/polar_spec.rb
index 2a5d8ebd69..824211fcd0 100644
--- a/spec/ruby/core/complex/polar_spec.rb
+++ b/spec/ruby/core/complex/polar_spec.rb
@@ -7,8 +7,22 @@ describe "Complex.polar" do
   end
 
   it "raises a TypeError when given non real arguments" do
-    ->{ Complex.polar(nil)      }.should raise_error(TypeError)
-    ->{ Complex.polar(nil, nil) }.should raise_error(TypeError)
+    ->{ Complex.polar(nil)      }.should.raise(TypeError)
+    ->{ Complex.polar(nil, nil) }.should.raise(TypeError)
+  end
+
+  it "computes the real values of the real & imaginary parts from the polar form" do
+    a = Complex.polar(1.0+0.0i, Math::PI/2+0.0i)
+    a.real.should be_close(0.0, TOLERANCE)
+    a.imag.should be_close(1.0, TOLERANCE)
+    a.real.real?.should == true
+    a.imag.real?.should == true
+
+    b = Complex.polar(1+0.0i)
+    b.real.should be_close(1.0, TOLERANCE)
+    b.imag.should be_close(0.0, TOLERANCE)
+    b.real.real?.should == true
+    b.imag.real?.should == true
   end
 end