Introduce continuous testing

This commit adds the ability to test Quarkus applications
running in dev mode in a continous manner, only running
tests that are affected by the changed code.

To this is it changes the test ClassLoading model to work
the same as the dev mode model, and adds the ability to
launch a completly isolated test application inside the
same JVM as an existing Quarkus app.

bom/application/pom.xml

@@ -213,6 +213,7 @@
         <avro.version>1.10.2</avro.version>
         <jacoco.version>0.8.6</jacoco.version>
         <testcontainers.version>1.15.2</testcontainers.version>
+        <aesh-readline.version>2.1</aesh-readline.version>
     </properties>
 
     <dependencyManagement>
@@ -4750,7 +4751,6 @@
                     </exclusion>
                 </exclusions>
             </dependency>
-
             <dependency>
                 <groupId>software.amazon.awssdk</groupId>
                 <artifactId>apache-client</artifactId>
@@ -5149,6 +5149,11 @@
                 <classifier>windows-x86_64</classifier>
                 <version>${grpc.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.aesh</groupId>
+                <artifactId>readline</artifactId>
+                <version>${aesh-readline.version}</version>
+            </dependency>
 
             <!-- Picocli -->
             <dependency>

build-parent/pom.xml

@@ -483,13 +483,11 @@
                                             <exclude>io.quarkus:quarkus-test-*</exclude>
                                             <exclude>io.rest-assured:*</exclude>
                                             <exclude>org.assertj:*</exclude>
-                                            <exclude>org.junit.jupiter:*</exclude>
                                         </excludes>
                                         <includes>
                                             <include>io.quarkus:quarkus-test-*:*:*:test</include>
                                             <include>io.rest-assured:*:*:*:test</include>
                                             <include>org.assertj:*:*:*:test</include>
-                                            <include>org.junit.jupiter:*:*:*:test</include>
                                         </includes>
                                         <message>Found test dependencies with wrong scope:</message>
                                     </bannedDependencies>
@@ -500,6 +498,27 @@
                                 <goal>enforce</goal>
                             </goals>
                         </execution>
+                        <execution>
+                            <id>enforce-test-deps-junit-scope</id>
+                            <configuration>
+                                <rules>
+                                    <bannedDependencies>
+                                        <searchTransitive>false</searchTransitive>
+                                        <excludes>
+                                            <exclude>org.junit.jupiter:*</exclude>
+                                        </excludes>
+                                        <includes>
+                                            <include>org.junit.jupiter:*:*:*:test</include>
+                                        </includes>
+                                        <message>Found JUnit dependencies with wrong scope:</message>
+                                    </bannedDependencies>
+                                </rules>
+                                <skip>${enforce-test-deps-scope.skip}</skip>
+                            </configuration>
+                            <goals>
+                                <goal>enforce</goal>
+                            </goals>
+                        </execution>
                     </executions>
                 </plugin>
                 <plugin>

core/deployment/pom.xml

@@ -14,6 +14,10 @@
     <name>Quarkus - Core - Deployment</name>
 
     <dependencies>
+        <dependency>
+            <groupId>org.aesh</groupId>
+            <artifactId>readline</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.wildfly.common</groupId>
             <artifactId>wildfly-common</artifactId>
@@ -106,10 +110,33 @@
             </exclusions>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-launcher</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+        </dependency>
     </dependencies>
 
     <build>
         <plugins>
+            <plugin>
+                <artifactId>maven-enforcer-plugin</artifactId>
+
+                <executions>
+                    <execution>
+                        <id>enforce-test-deps-junit-scope</id>
+                        <configuration>
+                            <skip>true</skip>
+                        </configuration>
+                        <goals>
+                            <goal>enforce</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>

core/deployment/src/main/java/io/quarkus/deployment/GeneratedClassGizmoAdaptor.java

@@ -2,11 +2,15 @@
 
 import java.io.StringWriter;
 import java.io.Writer;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
 import java.util.function.Predicate;
 
 import io.quarkus.bootstrap.BootstrapDebug;
+import io.quarkus.bootstrap.classloading.ClassPathElement;
+import io.quarkus.bootstrap.classloading.QuarkusClassLoader;
 import io.quarkus.deployment.annotations.BuildProducer;
 import io.quarkus.deployment.builditem.GeneratedClassBuildItem;
 import io.quarkus.gizmo.ClassOutput;
@@ -33,6 +37,18 @@ public GeneratedClassGizmoAdaptor(BuildProducer<GeneratedClassBuildItem> generat
         this.sources = BootstrapDebug.DEBUG_SOURCES_DIR != null ? new ConcurrentHashMap<>() : null;
     }
 
+    public GeneratedClassGizmoAdaptor(BuildProducer<GeneratedClassBuildItem> generatedClasses,
+            Function<String, String> generatedToBaseNameFunction) {
+        this.generatedClasses = generatedClasses;
+        this.applicationClassPredicate = new Predicate<String>() {
+            @Override
+            public boolean test(String s) {
+                return isApplicationClass(generatedToBaseNameFunction.apply(s));
+            }
+        };
+        this.sources = BootstrapDebug.DEBUG_SOURCES_DIR != null ? new ConcurrentHashMap<>() : null;
+    }
+
     @Override
     public void write(String className, byte[] bytes) {
         String source = null;
@@ -56,4 +72,13 @@ public Writer getSourceWriter(String className) {
         return ClassOutput.super.getSourceWriter(className);
     }
 
+    public static boolean isApplicationClass(String className) {
+        QuarkusClassLoader cl = (QuarkusClassLoader) Thread.currentThread()
+                .getContextClassLoader();
+        //if the class file is present in this (and not the parent) CL then it is an application class
+        List<ClassPathElement> res = cl
+                .getElementsWithResource(className.replace(".", "/") + ".class", true);
+        return !res.isEmpty();
+    }
+
 }

core/deployment/src/main/java/io/quarkus/deployment/QuarkusAugmentor.java

@@ -60,6 +60,7 @@ public class QuarkusAugmentor {
     private final String baseName;
     private final Consumer<ConfigBuilder> configCustomizer;
     private final boolean rebuild;
+    private final boolean auxiliaryApplication;
 
     QuarkusAugmentor(Builder builder) {
         this.classLoader = builder.classLoader;
@@ -78,6 +79,7 @@ public class QuarkusAugmentor {
         this.deploymentClassLoader = builder.deploymentClassLoader;
         this.rebuild = builder.rebuild;
         this.devModeType = builder.devModeType;
+        this.auxiliaryApplication = builder.auxiliaryApplication;
     }
 
     public BuildResult run() throws Exception {
@@ -141,7 +143,7 @@ public BuildResult run() throws Exception {
                     .produce(new ShutdownContextBuildItem())
                     .produce(new RawCommandLineArgumentsBuildItem())
                     .produce(new LaunchModeBuildItem(launchMode,
-                            devModeType == null ? Optional.empty() : Optional.of(devModeType)))
+                            devModeType == null ? Optional.empty() : Optional.of(devModeType), auxiliaryApplication))
                     .produce(new BuildSystemTargetBuildItem(targetDir, baseName, rebuild,
                             buildSystemProperties == null ? new Properties() : buildSystemProperties))
                     .produce(new DeploymentClassLoaderBuildItem(deploymentClassLoader))
@@ -196,6 +198,7 @@ public static final class Builder {
         Consumer<ConfigBuilder> configCustomizer;
         ClassLoader deploymentClassLoader;
         DevModeType devModeType;
+        boolean auxiliaryApplication;
 
         public Builder addBuildChainCustomizer(Consumer<BuildChainBuilder> customizer) {
             this.buildChainCustomizers.add(customizer);
@@ -216,6 +219,11 @@ public Builder excludeFromIndexing(Collection<Path> excludedFromIndexing) {
             return this;
         }
 
+        public Builder setAuxiliaryApplication(boolean auxiliaryApplication) {
+            this.auxiliaryApplication = auxiliaryApplication;
+            return this;
+        }
+
         public LaunchMode getLaunchMode() {
             return launchMode;
         }

core/deployment/src/main/java/io/quarkus/deployment/TestConfig.java

@@ -11,12 +11,101 @@
 /**
  * This is used currently only to suppress warnings about unknown properties
  * when the user supplies something like: -Dquarkus.test.profile=someProfile or -Dquarkus.test.native-image-profile=someProfile
- *
+ * <p>
  * TODO refactor code to actually use these values
  */
 @ConfigRoot
 public class TestConfig {
 
+    /**
+     * If continuous testing is enabled.
+     *
+     * The default value is 'paused', which will allow you to start testing
+     * from the console or the Dev UI, but will not run tests on startup.
+     *
+     * If this is set to 'enabled' then testing will start as soon as the
+     * application has started.
+     *
+     * If this is 'disabled' then continuous testing is not enabled, and can't
+     * be enabled without restarting the application.
+     *
+     */
+    @ConfigItem(defaultValue = "paused")
+    public Mode continuousTesting;
+
+    /**
+     * If output from the running tests should be displayed in the console.
+     */
+    @ConfigItem(defaultValue = "false")
+    public boolean displayTestOutput;
+
+    /**
+     * Tags that should be included for continuous testing.
+     */
+    @ConfigItem
+    public Optional<List<String>> includeTags;
+
+    /**
+     * Tags that should be excluded by default with continuous testing.
+     *
+     * This is ignored if include-tags has been set.
+     *
+     * Defaults to 'slow'
+     */
+    @ConfigItem(defaultValue = "slow")
+    public Optional<List<String>> excludeTags;
+
+    /**
+     * Tests that should be included for continuous testing. This is a regular expression.
+     */
+    @ConfigItem
+    public Optional<String> includePattern;
+
+    /**
+     * Tests that should be excluded with continuous testing. This is a regular expression.
+     *
+     * This is ignored if include-pattern has been set.
+     *
+     */
+    @ConfigItem
+    public Optional<String> excludePattern;
+    /**
+     * Disable the testing status/prompt message at the bottom of the console
+     * and log these messages to STDOUT instead.
+     *
+     * Use this option if your terminal does not support ANSI escape sequences.
+     */
+    @ConfigItem(defaultValue = "false")
+    public boolean basicConsole;
+
+    /**
+     * Disable color in the testing status and prompt messages.
+     *
+     * Use this option if your terminal does not support color.
+     */
+    @ConfigItem(defaultValue = "false")
+    public boolean disableColor;
+
+    /**
+     * If test results and status should be displayed in the console.
+     *
+     * If this is false results can still be viewed in the dev console.
+     */
+    @ConfigItem(defaultValue = "true")
+    public boolean console;
+
+    /**
+     * Changes tests to use the 'flat' ClassPath used in Quarkus 1.x versions.
+     *
+     * This means all Quarkus and test classes are loaded in the same ClassLoader,
+     * however it means you cannot use continuous testing.
+     *
+     * Note that if you find this necessary for your application then you
+     * may also have problems running in development mode, which cannot use
+     * a flat class path.
+     */
+    @ConfigItem(defaultValue = "false")
+    public boolean flatClassPath;
     /**
      * Duration to wait for the native image to built during testing
      */
@@ -35,6 +124,16 @@ public class TestConfig {
     @ConfigItem
     Profile profile;
 
+    /**
+     * Configures the hang detection in @QuarkusTest. If no activity happens (i.e. no test callbacks are called) over
+     * this period then QuarkusTest will dump all threads stack traces, to help diagnose a potential hang.
+     *
+     * Note that the initial timeout (before Quarkus has started) will only apply if provided by a system property, as
+     * it is not possible to read all config sources until Quarkus has booted.
+     */
+    @ConfigItem(defaultValue = "10m")
+    Duration hangDetectionTimeout;
+
     @ConfigGroup
     public static class Profile {
 
@@ -53,4 +152,11 @@ public static class Profile {
         @ConfigItem(defaultValue = "")
         Optional<List<String>> tags;
     }
+
+    public enum Mode {
+        PAUSED,
+        ENABLED,
+        DISABLED
+
+    }
 }

core/deployment/src/main/java/io/quarkus/deployment/builditem/LaunchModeBuildItem.java

@@ -15,9 +15,12 @@ public final class LaunchModeBuildItem extends SimpleBuildItem {
 
     private final Optional<DevModeType> devModeType;
 
-    public LaunchModeBuildItem(LaunchMode launchMode, Optional<DevModeType> devModeType) {
+    private final boolean auxiliaryApplication;
+
+    public LaunchModeBuildItem(LaunchMode launchMode, Optional<DevModeType> devModeType, boolean auxiliaryApplication) {
         this.launchMode = launchMode;
         this.devModeType = devModeType;
+        this.auxiliaryApplication = auxiliaryApplication;
     }
 
     public LaunchMode getLaunchMode() {
@@ -26,11 +29,21 @@ public LaunchMode getLaunchMode() {
 
     /**
      * The development mode type.
-     *
+     * <p>
      * Note that even for NORMAL launch modes this could be generating an application for the local side of remote
      * dev mode, so this may be set even for launch mode normal.
      */
     public Optional<DevModeType> getDevModeType() {
         return devModeType;
     }
+
+    /**
+     * An Auxiliary Application is a second application running in the same JVM as a primary application.
+     * <p>
+     * Currently this is done to allow running tests in dev mode, while the main dev mode process continues to
+     * run.
+     */
+    public boolean isAuxiliaryApplication() {
+        return auxiliaryApplication;
+    }
 }