Added some beginning test cases for abstract classes (will currently fail)

test/test-class-abstract.js

@@ -0,0 +1,98 @@
+/**
+ * Tests abstract classes
+ *
+ *  Copyright (C) 2010 Mike Gerwitz
+ *
+ *  This file is part of ease.js.
+ *
+ *  ease.js is free software: you can redistribute it and/or modify it under the
+ *  terms of the GNU Lesser General Public License as published by the Free
+ *  Software Foundation, either version 3 of the License, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @author  Mike Gerwitz
+ * @package test
+ */
+
+// don't perform these tests if getters/setters are unsupported
+if ( Object.prototype.__defineGetter__ === undefined )
+{
+    return;
+}
+
+require( './common' );
+
+var assert         = require( 'assert' ),
+    Class          = require( 'class' ),
+    abstractMethod = require( 'class' ).abstractMethod;
+
+// not abstract
+var Foo = Class.extend( {} );
+
+// abstract
+var AbstractFoo = Class.extend(
+{
+    method: abstractMethod( function( one, two, three ){} ),
+
+    second: abstractMethod(),
+});
+
+// still abstract (didn't provide a concrete implementation of both abstract
+// methods)
+var SubAbstractFoo = AbstractFoo.extend(
+{
+    second: function()
+    {
+    },
+});
+
+// concrete
+var ConcreteFoo = AbstractFoo.extend(
+{
+    method: function( one, two, three )
+    {
+    },
+
+    second: function()
+    {
+    },
+});
+
+assert.ok(
+    ( Foo.isAbstract instanceof Function ),
+    "All classes should have an isAbstract() method"
+);
+
+assert.equals(
+    Foo.isAbstract(),
+    false,
+    "Classes are not abstract if they contain no abstract methods"
+);
+
+assert.equals(
+    AbstractFoo.isAbstract(),
+    true,
+    "Classes should be considered abstract if they contain any abstract methods"
+);
+
+assert.equals(
+    SubAbstractFoo.isAbstract(),
+    true,
+    "Subtypes of abstract types are abstract if they don't provide a " +
+        "concrete implementation for all abstract methods"
+);
+
+assert.equals(
+    ConcreteFoo.isAbstract(),
+    false,
+    "Subtypes of abstract types are not abstract if they provide concrete " +
+        "implementations of all abstract methods"
+);