Initial implementation of JUnit5 integration (#220)

jgiven-junit5/build.gradle

@@ -0,0 +1,45 @@
+description = "Module for writing JGiven tests with JUnit 5"
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.0-M3'
+    }
+}
+
+apply plugin: 'org.junit.platform.gradle.plugin'
+
+compileJava {
+    sourceCompatibility = 1.8
+    targetCompatibility = 1.8
+    options.compilerArgs += '-parameters'
+    options.encoding = 'UTF-8'
+}
+
+task cleanReports(type: Delete) {
+    delete('build/reports/jgiven/json')
+}
+
+task copyJGivenReports(type: Copy, dependsOn: cleanReports) {
+    from('jgiven-reports')
+    into('build/reports/jgiven/json')
+}
+test.finalizedBy(copyJGivenReports)
+
+junitPlatform {
+    enableStandardTestTask true
+}
+
+
+dependencies {
+    compile project(':jgiven-core')
+    compile project(':jgiven-html5-report')
+
+    compileOnly 'org.junit.jupiter:junit-jupiter-api:5.0.0-M3'
+
+    testCompile 'org.junit.jupiter:junit-jupiter-engine:5.0.0-M3'
+}
+
+copyJGivenReports.finalizedBy(jgivenHtml5Report)

jgiven-junit5/src/main/java/com/tngtech/jgiven/junit5/JGivenExtension.java

@@ -0,0 +1,70 @@
+package com.tngtech.jgiven.junit5;
+
+import com.tngtech.jgiven.impl.Config;
+import com.tngtech.jgiven.impl.ScenarioBase;
+import com.tngtech.jgiven.report.impl.CommonReportHelper;
+import com.tngtech.jgiven.report.model.NamedArgument;
+import com.tngtech.jgiven.report.model.ReportModel;
+import org.junit.jupiter.api.extension.AfterAllCallback;
+import org.junit.jupiter.api.extension.AfterEachCallback;
+import org.junit.jupiter.api.extension.BeforeAllCallback;
+import org.junit.jupiter.api.extension.BeforeEachCallback;
+import org.junit.jupiter.api.extension.ContainerExtensionContext;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.api.extension.TestExtensionContext;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class JGivenExtension implements
+        BeforeAllCallback,
+        AfterAllCallback,
+        BeforeEachCallback,
+        AfterEachCallback {
+
+    public static final String REPORT_MODEL = "report-model";
+    public static final String SCENARIO = "scenario";
+
+    @Override
+    public void beforeAll(ContainerExtensionContext context) throws Exception {
+        ReportModel reportModel = new ReportModel();
+        reportModel.setTestClass(context.getTestClass().get());
+        context.getStore().put(REPORT_MODEL, reportModel);
+    }
+
+    @Override
+    public void afterAll(ContainerExtensionContext context) throws Exception {
+        new CommonReportHelper().finishReport((ReportModel) context.getStore().get(REPORT_MODEL));
+    }
+
+    @Override
+    public void beforeEach(TestExtensionContext context) throws Exception {
+        ScenarioBase scenario = new ScenarioBase();
+        context.getStore().put(SCENARIO, scenario);
+
+        ReportModel reportModel = (ReportModel) context.getParent().get().getStore().get(REPORT_MODEL);
+        scenario.setModel( reportModel );
+        scenario.getExecutor().injectStages( context.getTestInstance() );
+
+        List<NamedArgument> args = new ArrayList<>();
+        scenario.startScenario( context.getTestClass().get(), context.getTestMethod().get(), args );
+
+        scenario.getExecutor().readScenarioState( context.getTestInstance() );
+    }
+
+    @Override
+    public void afterEach(TestExtensionContext context) throws Exception {
+        ScenarioBase scenario = (ScenarioBase) context.getStore().get("scenario");
+        try {
+            if (context.getTestException().isPresent()) {
+                scenario.getExecutor().failed(context.getTestException().get());
+            }
+            scenario.finished();
+        } catch (Exception e) {
+            throw e;
+        } catch (Throwable e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+}

jgiven-junit5/src/test/java/com/tngtech/jgiven/junit5/test/JGiven5Test.java

@@ -0,0 +1,36 @@
+package com.tngtech.jgiven.junit5.test;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import com.tngtech.jgiven.Stage;
+import com.tngtech.jgiven.annotation.ScenarioStage;
+import com.tngtech.jgiven.junit5.JGivenExtension;
+
+@ExtendWith( JGivenExtension.class )
+public class JGiven5Test {
+
+    @ScenarioStage
+    Steps steps;
+
+    @Test
+    public void JGiven_works_with_JUnit5() {
+        steps.given().some_action().when().some_context().then().some_outcome();
+
+    }
+
+    public static class Steps extends Stage<Steps> {
+        Steps some_action() {
+            return self();
+        }
+
+        Steps some_context() {
+            return self();
+        }
+
+        Steps some_outcome() {
+            return self();
+        }
+    }
+
+}

settings.gradle

@@ -4,6 +4,7 @@ include ':jgiven-core'
 include ':jgiven-maven-plugin'
 include ':jgiven-gradle-plugin'
 include ':jgiven-junit'
+include ':jgiven-junit5'
 include ':jgiven-testng'
 include ':jgiven-spring'
 include ':jgiven-html5-report'