Abstract getters/setters are not yet supported

- Perhaps in future versions. The implementation details will not be ironed out before v0.1.0 and we can easily add it in the future without breaking BC. Getters/setters have not had too much attention thusfar in ease.js due to testing with systems that must work across many environments, including pre-ES5.

lib/MemberBuilderValidator.js

@@ -283,6 +283,14 @@ exports.prototype.validateGetterSetter = function(
         )
     ;
 
+    // abstract getters/setters are not yet supported
+    if ( keywords[ 'abstract' ] )
+    {
+        throw TypeError(
+            "Cannot declare getter/setter '" + name + "' as abstract"
+        );
+    }
+
     if ( prev || prev_gs )
     {
         // perform this check first, as it will make more sense than those that

test/MemberBuilderValidator/GetterSetterTest.js

@@ -37,6 +37,13 @@ require( 'common' ).testCase(
             shared.quickFailureTest.apply( _self, arguments );
         };
 
+        this.quickKeywordTest = function( keywords, identifier, prev )
+        {
+            shared.quickKeywordTest.call( this,
+                'validateGetterSetter', keywords, identifier, prev
+            );
+        };
+
         this.quickVisChangeTest = function( start, override, failtest, failstr )
         {
             shared.quickVisChangeTest.call( _self, start, override, failtest,
@@ -136,4 +143,15 @@ require( 'common' ).testCase(
             _self.quickVisChangeTest( cur[ 0 ], cur[ 1 ], true, 'conflict' );
         } );
     },
+
+
+    /**
+     * Abstract getter/setters are not yet supported. They may be supported in
+     * the future. Disallowing them now will allow us to determine an
+     * implementation in the future without breaking BC.
+     */
+    'Cannot declare abstract getters/setters': function()
+    {
+        this.quickKeywordTest( [ 'abstract' ], 'abstract' );
+    },
 } );