[Java] Add BeforeAll and AfterAll hooks

Work in progress to fix #515.

TODO:
 - [ ] How to deal with failure?
  - [ ] Test with JUnit4
  - [ ] Test with JUnit5
  - [ ] Test with TestNG
  - [ ] Test with CLI
  - [ ] Invoke around semantics?
 - [ ] How to report execution results?
  - [ ] TeamCity Plugin
  - [ ] Pretty formatter
  - [ ] Messages/Events

core/src/main/java/io/cucumber/core/backend/Glue.java

@@ -5,6 +5,10 @@
 @API(status = API.Status.STABLE)
 public interface Glue {
 
+    void addBeforeAllHook(StaticHookDefinition beforeAllHook);
+
+    void addAfterAllHook(StaticHookDefinition afterAllHook);
+
     void addStepDefinition(StepDefinition stepDefinition);
 
     void addBeforeHook(HookDefinition beforeHook);

core/src/main/java/io/cucumber/core/backend/StaticHookDefinition.java

@@ -0,0 +1,11 @@
+package io.cucumber.core.backend;
+
+import org.apiguardian.api.API;
+
+@API(status = API.Status.STABLE)
+public interface StaticHookDefinition extends Located {
+
+    void execute();
+
+    int getOrder();
+}

core/src/main/java/io/cucumber/core/runner/CachingGlue.java

@@ -9,6 +9,7 @@
 import io.cucumber.core.backend.HookDefinition;
 import io.cucumber.core.backend.ParameterTypeDefinition;
 import io.cucumber.core.backend.ScenarioScoped;
+import io.cucumber.core.backend.StaticHookDefinition;
 import io.cucumber.core.backend.StepDefinition;
 import io.cucumber.core.eventbus.EventBus;
 import io.cucumber.core.gherkin.Step;
@@ -45,11 +46,13 @@ final class CachingGlue implements Glue {
     private final List<DefaultDataTableCellTransformerDefinition> defaultDataTableCellTransformers = new ArrayList<>();
     private final List<DocStringTypeDefinition> docStringTypeDefinitions = new ArrayList<>();
 
+    private final List<StaticHookDefinition> beforeAllHooks = new ArrayList<>();
     private final List<CoreHookDefinition> beforeHooks = new ArrayList<>();
     private final List<CoreHookDefinition> beforeStepHooks = new ArrayList<>();
     private final List<StepDefinition> stepDefinitions = new ArrayList<>();
     private final List<CoreHookDefinition> afterStepHooks = new ArrayList<>();
     private final List<CoreHookDefinition> afterHooks = new ArrayList<>();
+    private final List<StaticHookDefinition> afterAllHooks = new ArrayList<>();
 
     /*
      * Storing the pattern that matches the step text allows us to cache the rather slow
@@ -67,6 +70,17 @@ final class CachingGlue implements Glue {
         this.bus = bus;
     }
 
+    @Override
+    public void addBeforeAllHook(StaticHookDefinition beforeAllHook) {
+        beforeAllHooks.add(beforeAllHook);
+
+    }
+
+    @Override
+    public void addAfterAllHook(StaticHookDefinition afterAllHook) {
+        afterAllHooks.add(afterAllHook);
+    }
+
     @Override
     public void addStepDefinition(StepDefinition stepDefinition) {
         stepDefinitions.add(stepDefinition);
@@ -126,6 +140,10 @@ public void addDocStringType(DocStringTypeDefinition docStringType) {
         docStringTypeDefinitions.add(docStringType);
     }
 
+    List<StaticHookDefinition> getBeforeAllHooks() {
+        return new ArrayList<>(beforeAllHooks);
+    }
+
     Collection<CoreHookDefinition> getBeforeHooks() {
         return new ArrayList<>(beforeHooks);
     }
@@ -146,6 +164,10 @@ Collection<CoreHookDefinition> getAfterStepHooks() {
         return hooks;
     }
 
+    List<StaticHookDefinition> getAfterAllHooks() {
+        return new ArrayList<>(afterAllHooks);
+    }
+
     Collection<ParameterTypeDefinition> getParameterTypeDefinitions() {
         return parameterTypeDefinitions;
     }

core/src/main/java/io/cucumber/core/runner/Runner.java

@@ -3,6 +3,7 @@
 import io.cucumber.core.api.TypeRegistryConfigurer;
 import io.cucumber.core.backend.Backend;
 import io.cucumber.core.backend.ObjectFactory;
+import io.cucumber.core.backend.StaticHookDefinition;
 import io.cucumber.core.eventbus.EventBus;
 import io.cucumber.core.gherkin.Pickle;
 import io.cucumber.core.gherkin.Step;
@@ -70,6 +71,14 @@ public void runPickle(Pickle pickle) {
         }
     }
 
+    public void runBeforeAllHooks(){
+        glue.getBeforeAllHooks().forEach(StaticHookDefinition::execute);
+    }
+
+    public void runAfterAllHooks(){
+        glue.getAfterAllHooks().forEach(StaticHookDefinition::execute);
+    }
+
     private List<SnippetGenerator> createSnippetGeneratorsForPickle(StepTypeRegistry stepTypeRegistry) {
         return backends.stream()
             .map(Backend::getSnippet)

core/src/main/java/io/cucumber/core/runtime/Runtime.java

@@ -90,6 +90,7 @@ public void run() {
         for (Feature feature : features) {
             bus.send(new TestSourceRead(bus.getInstant(), feature.getUri(), feature.getSource()));
         }
+        runnerSupplier.get().runBeforeAllHooks();
 
         final List<Future<?>> executingPickles = features.stream()
             .flatMap(feature -> feature.getPickles().stream())
@@ -119,7 +120,7 @@ public void run() {
         } else if (thrown.size() > 1) {
             throw new CompositeCucumberException(thrown);
         }
-
+        runnerSupplier.get().runAfterAllHooks();
         bus.send(new TestRunFinished(bus.getInstant()));
     }
 

examples/java-calculator/src/test/java/io/cucumber/examples/java/RpnCalculatorSteps.java

@@ -1,7 +1,9 @@
 package io.cucumber.examples.java;
 
 import io.cucumber.java.After;
+import io.cucumber.java.AfterAll;
 import io.cucumber.java.Before;
+import io.cucumber.java.BeforeAll;
 import io.cucumber.java.Scenario;
 import io.cucumber.java.en.Given;
 import io.cucumber.java.en.Then;
@@ -14,6 +16,16 @@
 public class RpnCalculatorSteps {
     private RpnCalculator calc;
 
+    @BeforeAll
+    public static void enable_super_math_engine(){
+        // System.enableSuperMaths()
+    }
+
+    @AfterAll
+    public static void disable_super_math_engine(){
+        // System.disableSuperMaths()
+    }
+
     @Given("a calculator I just turned on")
     public void a_calculator_I_just_turned_on() {
         calc = new RpnCalculator();

java/src/main/java/io/cucumber/java/After.java

@@ -23,8 +23,10 @@
     String value() default "";
 
     /**
-     * @return the order in which this hook should run. Higher numbers are run first.
+     * The order in which this hook should run. Higher numbers are run first.
      * The default order is 10000.
+     *
+     * @return the order in which this hook should run.
      */
     int order() default 10000;
 }

java/src/main/java/io/cucumber/java/AfterAll.java

@@ -0,0 +1,25 @@
+package io.cucumber.java;
+
+import org.apiguardian.api.API;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Executes a method before all scenarios
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+@API(status = API.Status.STABLE)
+public @interface AfterAll {
+
+    /**
+     * The order in which this hook should run. Higher numbers are run first.
+     * The default order is 10000.
+     *
+     * @return the order in which this hook should run.
+     */
+    int order() default 10000;
+}

java/src/main/java/io/cucumber/java/Before.java

@@ -23,8 +23,10 @@
     String value() default "";
 
     /**
-     * @return the order in which this hook should run. Lower numbers are run first.
+     * The order in which this hook should run. Lower numbers are run first.
      * The default order is 10000.
+     *
+     * @return the order in which this hook should run.
      */
     int order() default 10000;
 }

java/src/main/java/io/cucumber/java/BeforeAll.java

@@ -0,0 +1,25 @@
+package io.cucumber.java;
+
+import org.apiguardian.api.API;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Executes a method after all scenarios
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+@API(status = API.Status.STABLE)
+public @interface BeforeAll {
+
+    /**
+     * The order in which this hook should run. Lower numbers are run first.
+     * The default order is 10000.
+     *
+     * @return the order in which this hook should run.
+     */
+    int order() default 10000;
+}

java/src/main/java/io/cucumber/java/GlueAdaptor.java

@@ -25,10 +25,16 @@ void addDefinition(Method method, Annotation annotation) {
             Before before = (Before) annotation;
             String tagExpression = before.value();
             glue.addBeforeHook(new JavaHookDefinition(method, tagExpression, before.order(), lookup));
+        } else if (annotationType.equals(BeforeAll.class)) {
+            BeforeAll beforeAll = (BeforeAll) annotation;
+            glue.addBeforeAllHook(new JavaStaticHookDefinition(method, beforeAll.order(), lookup));
         } else if (annotationType.equals(After.class)) {
             After after = (After) annotation;
             String tagExpression = after.value();
             glue.addAfterHook(new JavaHookDefinition(method, tagExpression, after.order(), lookup));
+        } else if (annotationType.equals(AfterAll.class)) {
+            AfterAll afterAll = (AfterAll) annotation;
+            glue.addAfterAllHook(new JavaStaticHookDefinition(method, afterAll.order(), lookup));
         } else if (annotationType.equals(BeforeStep.class)) {
             BeforeStep beforeStep = (BeforeStep) annotation;
             String tagExpression = beforeStep.value();
@@ -58,7 +64,7 @@ void addDefinition(Method method, Annotation annotation) {
             DefaultDataTableCellTransformer cellTransformer = (DefaultDataTableCellTransformer) annotation;
             String[] emptyPatterns = cellTransformer.replaceWithEmptyString();
             glue.addDefaultDataTableCellTransformer(new JavaDefaultDataTableCellTransformerDefinition(method, lookup, emptyPatterns));
-        } else if (annotationType.equals(DocStringType.class)){
+        } else if (annotationType.equals(DocStringType.class)) {
             DocStringType docStringType = (DocStringType) annotation;
             String contentType = docStringType.contentType();
             glue.addDocStringType(new JavaDocStringTypeDefinition(contentType, method, lookup));

java/src/main/java/io/cucumber/java/JavaStaticHookDefinition.java

@@ -0,0 +1,52 @@
+package io.cucumber.java;
+
+import io.cucumber.core.backend.Lookup;
+import io.cucumber.core.backend.StaticHookDefinition;
+
+import java.lang.reflect.Method;
+
+import static io.cucumber.java.InvalidMethodSignatureException.builder;
+import static java.lang.reflect.Modifier.isStatic;
+
+final class JavaStaticHookDefinition extends AbstractGlueDefinition implements StaticHookDefinition {
+
+    private final int order;
+    private final Lookup lookup;
+
+    JavaStaticHookDefinition(Method method, int order, Lookup lookup) {
+        super(requireValidMethod(method), lookup);
+        this.order = order;
+        this.lookup = lookup;
+    }
+
+    private static Method requireValidMethod(Method method) {
+        Class<?>[] parameterTypes = method.getParameterTypes();
+        if (parameterTypes.length != 0) {
+            throw createInvalidSignatureException(method);
+        }
+
+        if (!isStatic(method.getModifiers())) {
+            throw createInvalidSignatureException(method);
+        }
+
+        return method;
+    }
+
+    private static InvalidMethodSignatureException createInvalidSignatureException(Method method) {
+        return builder(method)
+            .addAnnotation(BeforeAll.class)
+            .addAnnotation(AfterAll.class)
+            .addSignature("public static void before_or_after_all()")
+            .build();
+    }
+
+    @Override
+    public void execute() {
+        Invoker.invoke(this, lookup.getInstance(method.getDeclaringClass()), method);
+    }
+
+    @Override
+    public int getOrder() {
+        return order;
+    }
+}

java/src/main/java/io/cucumber/java/MethodScanner.java

@@ -2,10 +2,12 @@
 
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
-import java.lang.reflect.Modifier;
 import java.util.function.BiConsumer;
 
 import static io.cucumber.java.InvalidMethodException.createInvalidMethodException;
+import static java.lang.reflect.Modifier.isAbstract;
+import static java.lang.reflect.Modifier.isPublic;
+import static java.lang.reflect.Modifier.isStatic;
 
 final class MethodScanner {
 
@@ -27,8 +29,9 @@ static void scan(Class<?> aClass, BiConsumer<Method, Annotation> consumer) {
     }
 
     private static boolean isInstantiable(Class<?> clazz) {
-        boolean isNonStaticInnerClass = !Modifier.isStatic(clazz.getModifiers()) && clazz.getEnclosingClass() != null;
-        return Modifier.isPublic(clazz.getModifiers()) && !Modifier.isAbstract(clazz.getModifiers()) && !isNonStaticInnerClass;
+        return isPublic(clazz.getModifiers())
+            && !isAbstract(clazz.getModifiers())
+            && (isStatic(clazz.getModifiers()) || clazz.getEnclosingClass() == null);
     }
 
     private static void scan(BiConsumer<Method, Annotation> consumer, Class<?> aClass, Method method) {
@@ -59,7 +62,9 @@ private static void validateMethod(Class<?> glueCodeClass, Method method) {
     private static boolean isHookAnnotation(Annotation annotation) {
         Class<? extends Annotation> annotationClass = annotation.annotationType();
         return annotationClass.equals(Before.class)
+            || annotationClass.equals(BeforeAll.class)
             || annotationClass.equals(After.class)
+            || annotationClass.equals(AfterAll.class)
             || annotationClass.equals(BeforeStep.class)
             || annotationClass.equals(AfterStep.class)
             || annotationClass.equals(ParameterType.class)

java/src/test/java/io/cucumber/java/GlueAdaptorTest.java

@@ -9,6 +9,7 @@
 import io.cucumber.core.backend.HookDefinition;
 import io.cucumber.core.backend.Lookup;
 import io.cucumber.core.backend.ParameterTypeDefinition;
+import io.cucumber.core.backend.StaticHookDefinition;
 import io.cucumber.core.backend.StepDefinition;
 import io.cucumber.java.en.Given;
 import org.hamcrest.CustomTypeSafeMatcher;
@@ -61,6 +62,16 @@ protected boolean matchesSafely(StepDefinition item) {
     private HookDefinition beforeHook;
     private DocStringTypeDefinition docStringTypeDefinition;
     private final Glue container = new Glue() {
+        @Override
+        public void addBeforeAllHook(StaticHookDefinition beforeAllHook) {
+            //TODO
+        }
+
+        @Override
+        public void addAfterAllHook(StaticHookDefinition afterAllHook) {
+            //TODO
+        }
+
         @Override
         public void addStepDefinition(StepDefinition stepDefinition) {
             GlueAdaptorTest.this.stepDefinitions.add(stepDefinition);

junit-platform-engine/src/main/java/io/cucumber/junit/platform/engine/CucumberEngineExecutionContext.java

@@ -62,8 +62,10 @@ public final class CucumberEngineExecutionContext implements EngineExecutionCont
     }
 
     void startTestRun() {
-        logger.debug(() -> "Sending run test started event");
+        logger.debug(() -> "running before all hooks");
         bus.send(new TestRunStarted(bus.getInstant()));
+        logger.debug(() -> "Sending run test started event");
+        runnerSupplier.get().runBeforeAllHooks();
     }
 
     void beforeFeature(Feature feature) {
@@ -83,6 +85,8 @@ void runTestCase(Pickle pickle) {
     }
 
     void finishTestRun() {
+        logger.debug(() -> "running after all hooks");
+        runnerSupplier.get().runAfterAllHooks();
         logger.debug(() -> "Sending test run finished event");
         bus.send(new TestRunFinished(bus.getInstant()));
     }