io.cucumber.core.plugin.UnusedStepsSummaryPrinter Maven / Gradle / Ivy

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package io.cucumber.core.plugin;

import io.cucumber.plugin.ColorAware;
import io.cucumber.plugin.ConcurrentEventListener;
import io.cucumber.plugin.event.EventPublisher;
import io.cucumber.plugin.event.Status;
import io.cucumber.plugin.event.StepDefinedEvent;
import io.cucumber.plugin.event.TestRunFinished;
import io.cucumber.plugin.event.TestStepFinished;

import java.io.OutputStream;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;

import static io.cucumber.core.plugin.Formats.ansi;
import static io.cucumber.core.plugin.Formats.monochrome;
import static java.util.Locale.ROOT;

public final class UnusedStepsSummaryPrinter implements ColorAware, ConcurrentEventListener {

    private final Map registeredSteps = new TreeMap<>();
    private final Set usedSteps = new TreeSet<>();
    private final UTF8PrintWriter out;
    private Formats formats = ansi();

    public UnusedStepsSummaryPrinter(OutputStream out) {
        this.out = new UTF8PrintWriter(out);
    }

    @Override
    public void setEventPublisher(EventPublisher publisher) {
        // Record any steps registered
        publisher.registerHandlerFor(StepDefinedEvent.class, this::handleStepDefinedEvent);
        // Remove any steps that run
        publisher.registerHandlerFor(TestStepFinished.class, this::handleTestStepFinished);
        // Print summary when done
        publisher.registerHandlerFor(TestRunFinished.class, event -> finishReport());
    }

    private void handleStepDefinedEvent(StepDefinedEvent event) {
        registeredSteps.put(event.getStepDefinition().getLocation(), event.getStepDefinition().getPattern());
    }

    private void handleTestStepFinished(TestStepFinished event) {
        String codeLocation = event.getTestStep().getCodeLocation();
        if (codeLocation != null) {
            usedSteps.add(codeLocation);
        }
    }

    private void finishReport() {
        // Remove all used steps
        usedSteps.forEach(registeredSteps::remove);

        if (registeredSteps.isEmpty()) {
            return;
        }

        Format format = formats.get(Status.UNUSED.name().toLowerCase(ROOT));
        out.println(format.text(registeredSteps.size() + " Unused steps:"));

        // Output results when done
        for (Entry entry : registeredSteps.entrySet()) {
            String location = entry.getKey();
            String pattern = entry.getValue();
            out.println(format.text(location) + " # " + pattern);
        }

        out.close();
    }

    @Override
    public void setMonochrome(boolean monochrome) {
        formats = monochrome ? monochrome() : ansi();
    }

}