improve and spec custom ArrayIncludingMatcher

spec/custom_matchers.rb

@@ -5,8 +5,9 @@ module CustomMatchers
     end
 
     def ==(actual)
+      return false if actual.size < @expected.size
       @expected.each do | value |
-        return false unless actual.include?(value)
+        return false unless actual.any? { |actual_value| value == actual_value }
       end
       true
     rescue NoMethodError => ex

spec/custom_matchers_spec.rb

@@ -0,0 +1,62 @@
+require 'spec_helper'
+
+module CustomMatchers
+  describe ArrayIncludingMatcher do
+  
+    it "should describe itself properly" do
+      ArrayIncludingMatcher.new(:a, :b).description.should == "array_including(:a, :b)"
+    end      
+
+    describe "passing" do
+      it "should match the same array" do
+        array_including(:a).should == [:a]
+      end
+
+      it "should match a array with extra stuff" do
+        array_including(:a).should == [:a, :b]
+      end
+    
+      it "should match a array regardless of element position" do
+        array_including(:a, :b).should == [:b, :a]
+      end
+
+      describe "when matching against other matchers" do
+        it "should match a symbol against anything()" do
+          array_including(anything, :b).should == [:a, :b]
+        end
+
+        it "should match an int against anything()" do
+          array_including(anything, :b).should == [1, :b]
+        end
+
+        it "should match a string against anything()" do
+          array_including(anything, :b).should == ["1", :b]
+        end
+
+        it "should match an arbitrary object against anything()" do
+          array_including(anything, :b).should == [Class.new.new, :b]
+        end
+      end
+    end
+  
+    describe "failing" do
+      it "should not match a non-array" do
+        array_including(:a).should_not == :a
+      end
+
+      it "should not match a array with a missing element" do
+        array_including(:a).should_not == [:b]
+      end
+    
+      it "should not match an empty array with a given key" do
+        array_including(:a).should_not == []
+      end
+
+      describe "when matching against other matchers" do
+        it "should not match without additional elements" do
+          array_including(anything, 1).should_not == [1]
+        end
+      end
+    end
+  end
+end