Add Date#<=> with specs

adambeynon · adambeynon · commit c88503346556 · 2015-01-21T10:11:49.000Z
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## edge (upcoming 0.7)
 
+*   Add `Date#<=>` with specs.
+
 *   Show extended info and context upon parsing, compiling and building errors
 
 *   Support keyword arguments in method calls and definitions.
diff --git a/spec/opal/core/date_spec.rb b/spec/opal/core/date_spec.rb
@@ -34,6 +34,20 @@
     end
   end
 
+  describe '<=>' do
+    it 'returns -1 when self is less than other' do
+      (Date.new(2015, 1, 1) <=> Date.new(2015, 1, 2)).should == -1
+    end
+
+    it 'returns 0 when self is equal to other' do
+      (Date.new(2015, 1, 1) <=> Date.new(2015, 1, 1)).should == 0
+    end
+
+    it 'returns 1 when self is greater than other' do
+      (Date.new(2015, 1, 2) <=> Date.new(2015, 1, 1)).should == 1
+    end
+  end
+
   describe "#==" do
     it "returns true if self is equal to other date" do
       (Date.new(2013, 9, 13) == Date.new(2013, 9, 13)).should == true
diff --git a/stdlib/date.rb b/stdlib/date.rb
@@ -87,6 +87,24 @@ def >=(other)
     }
   end
 
+  def <=>(other)
+    %x{
+      var a = #@date, b = #{other}.date;
+      a.setHours(0, 0, 0, 0);
+      b.setHours(0, 0, 0, 0);
+
+      if (a < b) {
+        return -1;
+      }
+      else if (a > b) {
+        return 1;
+      }
+      else {
+        return 0;
+      }
+    }
+  end
+
   def ==(other)
     %x{
       var a = #@date, b = other.date;
