spec/spec_helper.rb in alf-0.9.0 vs spec/spec_helper.rb in alf-0.9.1

@@ -1,10 +1,14 @@
-$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+$LOAD_PATH.unshift File.expand_path('../../../lib', __FILE__)
 require 'alf'
 
 Alf::Lispy.extend(Alf::Lispy)
 
+def rel(*args)
+  Alf::Relation.coerce(args)
+end
+
 shared_examples_for "An operator class" do
 
   it "should not have public set_args, _each and _prepare methods" do
     operator_class.public_method_defined?(:set_args).should be_false
     operator_class.public_method_defined?(:_each).should be_false
@@ -19,8 +23,22 @@
     operator_class.public_method_defined?(:pipe).should be_true
   end
 
   it "should have a public each method" do
     operator_class.public_method_defined?(:each).should be_true
+  end
+  
+  it "should have a unary? class method" do
+    operator_class.should respond_to(:unary?)
+  end
+
+  it "should have a binary? class method" do
+    operator_class.should respond_to(:binary?)
+  end
+  
+  it "should implement unary? and binary? accurately" do
+    operator_class.unary?.should_not eq(operator_class.binary?)
+    operator_class.unary?.should eq(operator_class.ancestors.include?(Alf::Operator::Unary))
+    operator_class.binary?.should eq(operator_class.ancestors.include?(Alf::Operator::Binary))
   end
 
 end