1 files changed, 34 insertions, 0 deletions
diff --git a/spec/ruby/core/numeric/abs2_spec.rb b/spec/ruby/core/numeric/abs2_spec.rb
new file mode 100644
index 0000000000..f1094845fb
--- /dev/null
+++ b/spec/ruby/core/numeric/abs2_spec.rb
@@ -0,0 +1,34 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Numeric#abs2" do
+  before :each do
+    @numbers = [
+      0,
+      0.0,
+      1,
+      20,
+      bignum_value,
+      278202.292871,
+      72829,
+      3.333333333333,
+      0.1,
+      infinity_value
+    ].map { |n| [-n, n] }.flatten
+  end
+
+  it "returns the square of the absolute value of self" do
+    @numbers.each do |number|
+      number.abs2.should eql(number.abs ** 2)
+    end
+  end
+
+  it "calls #* on self" do
+    number = mock_numeric('numeric')
+    number.should_receive(:*).and_return(:result)
+    number.abs2.should == :result
+  end
+
+  it "returns NaN when self is NaN" do
+    nan_value.abs2.nan?.should be_true
+  end
+end