import org.gradle.internal.html.SimpleHtmlWriter;

import java.io.Writer;
import java.net.URL;

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);

        when:
        renderer.render("test: \u03b1\u03b2", reportRenderer, destDir)

        then:
        1 * reportRenderer.render(_, _) >> { String model, HtmlReportBuilder builder ->
            builder.renderHtmlPage("index.html", model, pageRenderer)
        }
        1 * pageRenderer.render(_, _) >> { String model, HtmlPageBuilder<SimpleHtmlWriter> builder ->
            builder.output.startElement("pre").characters(model).endElement()

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

    /**
     * Renders a single page HTML report from the given model, into the given output file.
     */

        }

        @Override
        public void run(BuildOperationContext context) {
            output.renderHtmlPage(fileUrl, results, renderer);
        }
    }