Make it simple to add Icon Transformation mappings when using the Rendering in standalone mode

        // Initialize Rendering components and allow getting instances
        final EmbeddableComponentManager cm = new EmbeddableComponentManager();
        cm.initialize(this.getClass().getClassLoader());

        XDOM xdom = new XDOM(Arrays.<Block>asList(new ParagraphBlock(Arrays.asList((Block) new SpecialSymbolBlock(':'),
            new SpecialSymbolBlock(':')))));

        // Test adding a new Icon Mapping by registering a Configuration Source implementation (note that this can
        // also be done by writing a Java class, using annotations and registering it in components.txt)
        cm.lookup(IconTransformationConfiguration.class).addMapping("::", "something");

        Transformation transformation = cm.lookup(Transformation.class, "icon");
        TransformationContext txContext = new TransformationContext();
        transformation.transform(xdom, txContext);

        WikiPrinter printer = new DefaultWikiPrinter();
        BlockRenderer renderer = cm.lookup(BlockRenderer.class, Syntax.XWIKI_2_0.toIdString());
        renderer.render(xdom, printer);

        String expected = "image:something";

        Assert.assertEquals(expected, printer.toString());