Transformer<String, ProjectNameAndPath> jsScheme = projectNamingScheme("js");
                ProjectPageRenderer projectPageRenderer = new ProjectPageRenderer(jsScheme);
                builder.renderRawHtmlPage("index.html", model, new ProjectsPageRenderer(htmlPageScheme));
                for (ProjectNameAndPath project : model) {
                    String jsFileName = jsScheme.transform(project);

        then:
        1 * reportRenderer.render(_, _) >> { String model, HtmlReportBuilder builder ->
            builder.renderRawHtmlPage("index.html", model, pageRenderer)
            builder.renderRawHtmlPage("child/other.html", "[${model}]" as String, pageRenderer)
        }
        2 * pageRenderer.render(_, _) >> { String model, HtmlPageBuilder<Writer> builder ->

public interface HtmlReportBuilder {
    void requireResource(URL resource);

    <T> void renderHtmlPage(String name, T model, ReportRenderer<T, HtmlPageBuilder<SimpleHtmlWriter>> renderer);

    <T> void renderRawHtmlPage(String name, T model, ReportRenderer<T, HtmlPageBuilder<Writer>> renderer);

        render(model, new ReportRenderer<T, HtmlReportBuilder>() {
            @Override
            public void render(T model, HtmlReportBuilder output) throws IOException {
                output.renderRawHtmlPage(outputFile.getName(), model, renderer);
            }
        }, outputFile.getParentFile());
    }

    private static class Resource {
        final URL source;
        final String path;