cucumber · mpkorstanje · Sep 19, 2025 · Sep 11, 2025 · Jul 17, 2025 · Sep 11, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -22,13 +22,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - [Core] Use a message based `RerunFormatter` ([#3075](https://github.com/cucumber/cucumber-jvm/pull/3075) M.P. Korstanje)
 - [Core] Use a message based `TeamCityPlugin` ([#3050](https://github.com/cucumber/cucumber-jvm/pull/3050) M.P. Korstanje)
+- [Core] Use a message based `DefaultSummaryPrinter` ([#3028](https://github.com/cucumber/cucumber-jvm/pull/3028) M.P. Korstanje)
+- [Core] Use a message based `ProgressFormatter` ([#3028](https://github.com/cucumber/cucumber-jvm/pull/3028) M.P. Korstanje)
 - [Core] Update dependency io.cucumber:cucumber-json-formatter to v0.2.0
 - [Core] Update dependency io.cucumber:gherkin to v35.0.0
 - [Core] Update dependency io.cucumber:html-formatter to v21.15.0
 - [Core] Update dependency io.cucumber:junit-xml-formatter to v0.9.0
 - [Core] Update dependency io.cucumber:messages to v29.0.1 
-- [Core] Update dependency io.cucumber:pretty-formatter to v2.2.0
-- [Core] Update dependency io.cucumber:query to v14.0.1
+- [Core] Update dependency io.cucumber:pretty-formatter to v2.3.0
+- [Core] Update dependency io.cucumber:query to v14.3.0
 - [Core] Update dependency io.cucumber:testng-xml-formatter to v0.6.0
 
 ## [7.28.2] - 2025-09-09

diff --git a/cucumber-bom/pom.xml b/cucumber-bom/pom.xml
@@ -20,7 +20,7 @@
         <html-formatter.version>21.15.1</html-formatter.version>
         <junit-xml-formatter.version>0.9.0</junit-xml-formatter.version>
         <messages.version>29.0.1</messages.version>
-        <pretty-formatter.version>2.2.0</pretty-formatter.version>
+        <pretty-formatter.version>2.3.0</pretty-formatter.version>
         <query.version>14.3.0</query.version>
         <tag-expressions.version>6.1.2</tag-expressions.version>
         <teamcity-formatter.version>0.1.1</teamcity-formatter.version>

diff --git a/cucumber-core/src/main/java/io/cucumber/core/plugin/DefaultSummaryPrinter.java b/cucumber-core/src/main/java/io/cucumber/core/plugin/DefaultSummaryPrinter.java
@@ -1,86 +1,66 @@
 package io.cucumber.core.plugin;
 
+import io.cucumber.messages.types.Envelope;
 import io.cucumber.plugin.ColorAware;
 import io.cucumber.plugin.ConcurrentEventListener;
 import io.cucumber.plugin.event.EventPublisher;
-import io.cucumber.plugin.event.SnippetsSuggestedEvent;
-import io.cucumber.plugin.event.TestRunFinished;
+import io.cucumber.prettyformatter.MessagesToSummaryWriter;
 
+import java.io.IOException;
 import java.io.OutputStream;
 import java.io.PrintStream;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Locale;
-import java.util.Set;
+
+import static io.cucumber.prettyformatter.Theme.cucumber;
+import static io.cucumber.prettyformatter.Theme.plain;
 
 public final class DefaultSummaryPrinter implements ColorAware, ConcurrentEventListener {
 
-    private final Set<String> snippets = new LinkedHashSet<>();
-    private final Stats stats;
-    private final PrintStream out;
+    private final OutputStream out;
+    private MessagesToSummaryWriter writer;
 
     public DefaultSummaryPrinter() {
-        this(System.out, Locale.getDefault());
-    }
-
-    DefaultSummaryPrinter(OutputStream out, Locale locale) {
-        this.out = new PrintStream(out);
-        this.stats = new Stats(locale);
+        this(new PrintStream(System.out) {
+            @Override
+            public void close() {
+                // Don't close System.out
+            }
+        });
     }
 
-    @Override
-    public void setEventPublisher(EventPublisher publisher) {
-        stats.setEventPublisher(publisher);
-        publisher.registerHandlerFor(SnippetsSuggestedEvent.class, this::handleSnippetsSuggestedEvent);
-        publisher.registerHandlerFor(TestRunFinished.class, event -> print());
+    DefaultSummaryPrinter(OutputStream out) {
+        this.out = out;
+        this.writer = createBuilder().build(out);
     }
 
-    private void handleSnippetsSuggestedEvent(SnippetsSuggestedEvent event) {
-        this.snippets.addAll(event.getSuggestion().getSnippets());
+    private static MessagesToSummaryWriter.Builder createBuilder() {
+        return MessagesToSummaryWriter.builder()
+                .theme(cucumber());
     }
 
-    private void print() {
-        out.println();
-        printStats();
-        printErrors();
-        printSnippets();
-        out.println();
-    }
-
-    private void printStats() {
-        stats.printStats(out);
-        out.println();
+    @Override
+    public void setMonochrome(boolean monochrome) {
+        if (monochrome) {
+            writer = createBuilder().theme(plain()).build(out);
+        }
     }
 
-    private void printErrors() {
-        List<Throwable> errors = stats.getErrors();
-        if (errors.isEmpty()) {
-            return;
-        }
-        out.println();
-        for (Throwable error : errors) {
-            error.printStackTrace(out);
-            out.println();
-        }
+    @Override
+    public void setEventPublisher(EventPublisher publisher) {
+        publisher.registerHandlerFor(Envelope.class, this::write);
     }
 
-    private void printSnippets() {
-        if (snippets.isEmpty()) {
-            return;
+    private void write(Envelope event) {
+        try {
+            writer.write(event);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
         }
 
-        out.println();
-        out.println("You can implement missing steps with the snippets below:");
-        out.println();
-        for (String snippet : snippets) {
-            out.println(snippet);
-            out.println();
+        // TODO: Plugins should implement the closable interface
+        // and be closed by Cucumber
+        if (event.getTestRunFinished().isPresent()) {
+            writer.close();
         }
     }
 
-    @Override
-    public void setMonochrome(boolean monochrome) {
-        stats.setMonochrome(monochrome);
-    }
-
 }
diff --git a/cucumber-core/src/main/java/io/cucumber/core/plugin/ProgressFormatter.java b/cucumber-core/src/main/java/io/cucumber/core/plugin/ProgressFormatter.java
@@ -1,33 +1,16 @@
 package io.cucumber.core.plugin;
 
 import io.cucumber.messages.types.Envelope;
-import io.cucumber.messages.types.TestRunFinished;
-import io.cucumber.messages.types.TestStepFinished;
-import io.cucumber.messages.types.TestStepResultStatus;
 import io.cucumber.plugin.ColorAware;
 import io.cucumber.plugin.ConcurrentEventListener;
 import io.cucumber.plugin.event.EventPublisher;
+import io.cucumber.prettyformatter.MessagesToProgressWriter;
 
+import java.io.IOException;
 import java.io.OutputStream;
-import java.io.OutputStreamWriter;
-import java.io.PrintWriter;
-import java.nio.charset.StandardCharsets;
-import java.util.EnumMap;
-import java.util.Map;
 
-import static io.cucumber.core.plugin.ProgressFormatter.Ansi.Attributes.FOREGROUND_CYAN;
-import static io.cucumber.core.plugin.ProgressFormatter.Ansi.Attributes.FOREGROUND_DEFAULT;
-import static io.cucumber.core.plugin.ProgressFormatter.Ansi.Attributes.FOREGROUND_GREEN;
-import static io.cucumber.core.plugin.ProgressFormatter.Ansi.Attributes.FOREGROUND_RED;
-import static io.cucumber.core.plugin.ProgressFormatter.Ansi.Attributes.FOREGROUND_YELLOW;
-import static io.cucumber.messages.types.TestStepResultStatus.AMBIGUOUS;
-import static io.cucumber.messages.types.TestStepResultStatus.FAILED;
-import static io.cucumber.messages.types.TestStepResultStatus.PASSED;
-import static io.cucumber.messages.types.TestStepResultStatus.PENDING;
-import static io.cucumber.messages.types.TestStepResultStatus.SKIPPED;
-import static io.cucumber.messages.types.TestStepResultStatus.UNDEFINED;
-import static java.lang.System.lineSeparator;
-import static java.util.Objects.requireNonNull;
+import static io.cucumber.prettyformatter.Theme.cucumber;
+import static io.cucumber.prettyformatter.Theme.plain;
 
 /**
  * Renders a rudimentary progress bar.
@@ -37,143 +20,42 @@
  */
 public final class ProgressFormatter implements ConcurrentEventListener, ColorAware {
 
-    private static final int MAX_WIDTH = 80;
-    private static final Map<TestStepResultStatus, String> SYMBOLS = new EnumMap<>(TestStepResultStatus.class);
-    private static final Map<TestStepResultStatus, Ansi> ESCAPES = new EnumMap<>(TestStepResultStatus.class);
-    private static final Ansi RESET = Ansi.with(FOREGROUND_DEFAULT);
-    static {
-        SYMBOLS.put(PASSED, ".");
-        SYMBOLS.put(UNDEFINED, "U");
-        SYMBOLS.put(PENDING, "P");
-        SYMBOLS.put(SKIPPED, "-");
-        SYMBOLS.put(FAILED, "F");
-        SYMBOLS.put(AMBIGUOUS, "A");
-
-        ESCAPES.put(PASSED, Ansi.with(FOREGROUND_GREEN));
-        ESCAPES.put(UNDEFINED, Ansi.with(FOREGROUND_YELLOW));
-        ESCAPES.put(PENDING, Ansi.with(FOREGROUND_YELLOW));
-        ESCAPES.put(SKIPPED, Ansi.with(FOREGROUND_CYAN));
-        ESCAPES.put(FAILED, Ansi.with(FOREGROUND_RED));
-        ESCAPES.put(AMBIGUOUS, Ansi.with(FOREGROUND_RED));
-    }
-
-    private final PrintWriter writer;
-    private boolean monochrome = false;
-    private int width = 0;
+    private final OutputStream out;
+    private MessagesToProgressWriter writer;
 
     public ProgressFormatter(OutputStream out) {
-        this.writer = createPrintWriter(out);
+        this.out = out;
+        this.writer = createBuilder().build(out);
     }
 
-    private static PrintWriter createPrintWriter(OutputStream out) {
-        return new PrintWriter(
-            new OutputStreamWriter(
-                requireNonNull(out),
-                StandardCharsets.UTF_8));
+    private static MessagesToProgressWriter.Builder createBuilder() {
+        return MessagesToProgressWriter.builder()
+                .theme(cucumber());
     }
 
     @Override
     public void setMonochrome(boolean monochrome) {
-        this.monochrome = monochrome;
+        if (monochrome) {
+            writer = createBuilder().theme(plain()).build(out);
+        }
     }
 
     @Override
     public void setEventPublisher(EventPublisher publisher) {
-        publisher.registerHandlerFor(Envelope.class, event -> {
-            event.getTestStepFinished().ifPresent(this::handleTestStepFinished);
-            event.getTestRunFinished().ifPresent(this::handleTestRunFinished);
-        });
+        publisher.registerHandlerFor(Envelope.class, this::write);
     }
 
-    private void handleTestStepFinished(TestStepFinished event) {
-        TestStepResultStatus status = event.getTestStepResult().getStatus();
-        // Prevent tearing in output when multiple threads write to System.out
-        StringBuilder buffer = new StringBuilder();
-        if (!monochrome) {
-            buffer.append(ESCAPES.get(status));
-        }
-        buffer.append(SYMBOLS.get(status));
-        if (!monochrome) {
-            buffer.append(RESET);
-        }
-        // Start a new line if at the end of this one
-        if (++width % MAX_WIDTH == 0) {
-            width = 0;
-            buffer.append(lineSeparator());
-        }
-        writer.append(buffer);
-        // Flush to provide immediate feedback.
-        writer.flush();
-    }
-
-    private void handleTestRunFinished(TestRunFinished testRunFinished) {
-        writer.println();
-        writer.close();
-    }
-
-    /**
-     * Represents an
-     * <a href="https://en.wikipedia.org/wiki/ANSI_escape_code">ANSI escape
-     * code</a> in the format {@code CSI n m}.
-     */
-    static final class Ansi {
-
-        private static final char FIRST_ESCAPE = 27;
-        private static final char SECOND_ESCAPE = '[';
-        private static final String END_SEQUENCE = "m";
-        private final String controlSequence;
-
-        /**
-         * Constructs an ANSI escape code with the given attributes.
-         *
-         * @param  attributes to include.
-         * @return            an ANSI escape code with the given attributes
-         */
-        public static Ansi with(Ansi.Attributes... attributes) {
-            return new Ansi(requireNonNull(attributes));
+    private void write(Envelope event) {
+        try {
+            writer.write(event);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
         }
 
-        private Ansi(Ansi.Attributes... attributes) {
-            this.controlSequence = createControlSequence(attributes);
-        }
-
-        private String createControlSequence(Ansi.Attributes... attributes) {
-            StringBuilder a = new StringBuilder(attributes.length * 5);
-
-            for (Ansi.Attributes attribute : attributes) {
-                a.append(FIRST_ESCAPE).append(SECOND_ESCAPE);
-                a.append(attribute.value);
-                a.append(END_SEQUENCE);
-            }
-
-            return a.toString();
-        }
-
-        @Override
-        public String toString() {
-            return controlSequence;
-        }
-
-        /**
-         * A select number of attributes from all the available <a
-         * href=https://en.wikipedia.org/wiki/ANSI_escape_code#Select_Graphic_Rendition_parameters>Select
-         * Graphic Rendition attributes</a>.
-         */
-        enum Attributes {
-
-            // https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
-            FOREGROUND_RED(31),
-            FOREGROUND_GREEN(32),
-            FOREGROUND_YELLOW(33),
-            FOREGROUND_CYAN(36),
-            FOREGROUND_DEFAULT(39);
-
-            private final int value;
-
-            Attributes(int index) {
-                this.value = index;
-            }
+        // TODO: Plugins should implement the closable interface
+        // and be closed by Cucumber
+        if (event.getTestRunFinished().isPresent()) {
+            writer.close();
         }
     }
-
 }