1 files changed, 48 insertions, 0 deletions
diff --git a/spec/ruby/core/numeric/rectangular_spec.rb b/spec/ruby/core/numeric/rectangular_spec.rb
new file mode 100644
index 0000000000..81afccc12d
--- /dev/null
+++ b/spec/ruby/core/numeric/rectangular_spec.rb
@@ -0,0 +1,48 @@
+require_relative '../../spec_helper'
+
+describe "Numeric#rectangular" do
+  before :each do
+    @numbers = [
+      20,             # Integer
+      398.72,         # Float
+      Rational(3, 4), # Rational
+      99999999**99, # Bignum
+      infinity_value,
+      nan_value
+    ]
+  end
+
+  it "returns an Array" do
+    @numbers.each do |number|
+      number.rectangular.should.instance_of?(Array)
+    end
+  end
+
+  it "returns a two-element Array" do
+    @numbers.each do |number|
+      number.rectangular.size.should == 2
+    end
+  end
+
+  it "returns self as the first element" do
+    @numbers.each do |number|
+      if Float === number and number.nan?
+        number.rectangular.first.nan?.should == true
+      else
+        number.rectangular.first.should == number
+      end
+    end
+  end
+
+  it "returns 0 as the last element" do
+    @numbers.each do |number|
+      number.rectangular.last.should == 0
+    end
+  end
+
+  it "raises an ArgumentError if given any arguments" do
+    @numbers.each do |number|
+      -> { number.rectangular(number) }.should.raise(ArgumentError)
+    end
+  end
+end