1 files changed, 35 insertions, 2 deletions
diff --git a/spec/ruby/core/float/arg_spec.rb b/spec/ruby/core/float/arg_spec.rb
index 20a8ac0a63..c9c602bbf6 100644
--- a/spec/ruby/core/float/arg_spec.rb
+++ b/spec/ruby/core/float/arg_spec.rb
@@ -1,5 +1,38 @@
-require File.expand_path('../../../shared/complex/float/arg', __FILE__)
+require_relative '../../spec_helper'
 
 describe "Float#arg" do
-  it_behaves_like :float_arg, :arg
+  it "returns NaN if NaN" do
+    f = nan_value
+    f.arg.nan?.should == true
+  end
+
+  it "returns self if NaN" do
+    f = nan_value
+    f.arg.should.equal?(f)
+  end
+
+  it "returns 0 if positive" do
+    1.0.arg.should == 0
+  end
+
+  it "returns 0 if +0.0" do
+    0.0.arg.should == 0
+  end
+
+  it "returns 0 if +Infinity" do
+    infinity_value.arg.should == 0
+  end
+
+  it "returns Pi if negative" do
+    (-1.0).arg.should == Math::PI
+  end
+
+  # This was established in r23960
+  it "returns Pi if -0.0" do
+    (-0.0).arg.should == Math::PI
+  end
+
+  it "returns Pi if -Infinity" do
+    (-infinity_value).arg.should == Math::PI
+  end
 end