spec/permutations_spec.rb in epitools-0.4.15 vs spec/permutations_spec.rb in epitools-0.4.16

@@ -9,6 +9,27 @@
 
   it "a**2" do
     ([1,2] ** 2).should == [ [1,1], [1,2], [2,1], [2,2] ]
   end    
   
+  it "all_pairses" do
+    [1,2,3,4].all_pairs.to_a.should == [ 
+      [1,2], 
+      [1,3], 
+      [1,4], 
+      [2,3],
+      [2,4],
+      [3,4],
+    ]
+
+    # reflexive    
+    [1,2,3].all_pairs(true).to_a.should == [
+      [1,1],
+      [1,2],
+      [1,3],
+      [2,2],
+      [2,3],
+      [3,3],
+    ]
+  end
+
 end