Relocate test projects under spring-boot-tests

Move integration and deployment tests under a single `spring-boot-tests`
module.

See gh-9316

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/com/example/ControllerOne.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class ControllerOne {
+
+	@RequestMapping("/one")
+	public String one() {
+		return "one";
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/com/example/DevToolsTestApplication.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.system.EmbeddedServerPortFileWriter;
+
+@SpringBootApplication
+public class DevToolsTestApplication {
+
+	public static void main(String[] args) {
+		new SpringApplicationBuilder(DevToolsTestApplication.class)
+				.listeners(new EmbeddedServerPortFileWriter("target/server.port"))
+				.run(args);
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/ApplicationLauncher.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+/**
+ * Launches an application with DevTools.
+ *
+ * @author Andy Wilkinson
+ */
+public interface ApplicationLauncher {
+
+	LaunchedApplication launchApplication(JvmLauncher javaLauncher) throws Exception;
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/DevToolsIntegrationTests.java

@@ -0,0 +1,200 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+import java.io.FileReader;
+import java.util.ArrayList;
+import java.util.List;
+
+import net.bytebuddy.ByteBuddy;
+import net.bytebuddy.description.annotation.AnnotationDescription;
+import net.bytebuddy.description.modifier.Visibility;
+import net.bytebuddy.dynamic.DynamicType.Builder;
+import net.bytebuddy.implementation.FixedValue;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.util.FileCopyUtils;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for DevTools.
+ *
+ * @author Andy Wilkinson
+ */
+@RunWith(Parameterized.class)
+public class DevToolsIntegrationTests {
+
+	private LaunchedApplication launchedApplication;
+
+	private final File serverPortFile = new File("target/server.port");
+
+	private final ApplicationLauncher applicationLauncher;
+
+	@Rule
+	public JvmLauncher javaLauncher = new JvmLauncher();
+
+	@Parameters(name = "{0}")
+	public static Object[] parameters() {
+		return new Object[] { new Object[] { new LocalApplicationLauncher() },
+				new Object[] { new ExplodedRemoteApplicationLauncher() },
+				new Object[] { new JarFileRemoteApplicationLauncher() } };
+	}
+
+	public DevToolsIntegrationTests(ApplicationLauncher applicationLauncher) {
+		this.applicationLauncher = applicationLauncher;
+	}
+
+	@Before
+	public void launchApplication() throws Exception {
+		this.serverPortFile.delete();
+		System.out.println("Launching " + this.javaLauncher.getClass());
+		this.launchedApplication = this.applicationLauncher
+				.launchApplication(this.javaLauncher);
+	}
+
+	@After
+	public void stopApplication() throws InterruptedException {
+		this.launchedApplication.stop();
+	}
+
+	@Test
+	public void addARequestMappingToAnExistingController() throws Exception {
+		TestRestTemplate template = new TestRestTemplate();
+		String urlBase = "http://localhost:" + awaitServerPort();
+		assertThat(template.getForObject(urlBase + "/one", String.class))
+				.isEqualTo("one");
+		assertThat(template.getForEntity(urlBase + "/two", String.class).getStatusCode())
+				.isEqualTo(HttpStatus.NOT_FOUND);
+		controller("com.example.ControllerOne").withRequestMapping("one")
+				.withRequestMapping("two").build();
+		assertThat(template.getForObject(urlBase + "/one", String.class))
+				.isEqualTo("one");
+		assertThat(template.getForObject("http://localhost:" + awaitServerPort() + "/two",
+				String.class)).isEqualTo("two");
+	}
+
+	@Test
+	public void removeARequestMappingFromAnExistingController() throws Exception {
+		TestRestTemplate template = new TestRestTemplate();
+		assertThat(template.getForObject("http://localhost:" + awaitServerPort() + "/one",
+				String.class)).isEqualTo("one");
+		controller("com.example.ControllerOne").build();
+		assertThat(template.getForEntity("http://localhost:" + awaitServerPort() + "/one",
+				String.class).getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND);
+	}
+
+	@Test
+	public void createAController() throws Exception {
+		TestRestTemplate template = new TestRestTemplate();
+		String urlBase = "http://localhost:" + awaitServerPort();
+		assertThat(template.getForObject(urlBase + "/one", String.class))
+				.isEqualTo("one");
+		assertThat(template.getForEntity(urlBase + "/two", String.class).getStatusCode())
+				.isEqualTo(HttpStatus.NOT_FOUND);
+		controller("com.example.ControllerTwo").withRequestMapping("two").build();
+		assertThat(template.getForObject(urlBase + "/one", String.class))
+				.isEqualTo("one");
+		assertThat(template.getForObject("http://localhost:" + awaitServerPort() + "/two",
+				String.class)).isEqualTo("two");
+
+	}
+
+	@Test
+	public void deleteAController() throws Exception {
+		TestRestTemplate template = new TestRestTemplate();
+		assertThat(template.getForObject("http://localhost:" + awaitServerPort() + "/one",
+				String.class)).isEqualTo("one");
+		assertThat(new File(this.launchedApplication.getClassesDirectory(),
+				"com/example/ControllerOne.class").delete()).isTrue();
+		assertThat(template.getForEntity("http://localhost:" + awaitServerPort() + "/one",
+				String.class).getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND);
+
+	}
+
+	private int awaitServerPort() throws Exception {
+		long end = System.currentTimeMillis() + 30000;
+		while (this.serverPortFile.length() == 0) {
+			System.out.println("Getting server port " + this.serverPortFile.length());
+			if (System.currentTimeMillis() > end) {
+				throw new IllegalStateException(String.format(
+						"server.port file was not written within 30 seconds. "
+								+ "Application output:%n%s%s",
+						FileCopyUtils.copyToString(new FileReader(
+								this.launchedApplication.getStandardOut())),
+						FileCopyUtils.copyToString(new FileReader(
+								this.launchedApplication.getStandardError()))));
+			}
+			Thread.sleep(100);
+		}
+		FileReader portReader = new FileReader(this.serverPortFile);
+		int port = Integer.valueOf(FileCopyUtils.copyToString(portReader));
+		this.serverPortFile.delete();
+		System.out.println("Got port " + port);
+		return port;
+	}
+
+	private ControllerBuilder controller(String name) {
+		return new ControllerBuilder(name,
+				this.launchedApplication.getClassesDirectory());
+	}
+
+	private static final class ControllerBuilder {
+
+		private final List<String> mappings = new ArrayList<>();
+
+		private final String name;
+
+		private final File classesDirectory;
+
+		private ControllerBuilder(String name, File classesDirectory) {
+			this.name = name;
+			this.classesDirectory = classesDirectory;
+		}
+
+		public ControllerBuilder withRequestMapping(String mapping) {
+			this.mappings.add(mapping);
+			return this;
+		}
+
+		public void build() throws Exception {
+			Builder<Object> builder = new ByteBuddy().subclass(Object.class)
+					.name(this.name).annotateType(AnnotationDescription.Builder
+							.ofType(RestController.class).build());
+			for (String mapping : this.mappings) {
+				builder = builder.defineMethod(mapping, String.class, Visibility.PUBLIC)
+						.intercept(FixedValue.value(mapping)).annotateMethod(
+								AnnotationDescription.Builder.ofType(RequestMapping.class)
+										.defineArray("value", mapping).build());
+			}
+			builder.make().saveIn(this.classesDirectory);
+		}
+
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/ExplodedRemoteApplicationLauncher.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.util.FileSystemUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * {@link ApplicationLauncher} that launches a remote application with its classes
+ * available directly on the file system.
+ *
+ * @author Andy Wilkinson
+ */
+public class ExplodedRemoteApplicationLauncher extends RemoteApplicationLauncher {
+
+	@Override
+	protected String createApplicationClassPath() throws Exception {
+		File appDirectory = new File("target/app");
+		FileSystemUtils.deleteRecursively(appDirectory);
+		appDirectory.mkdirs();
+		FileSystemUtils.copyRecursively(new File("target/test-classes/com"),
+				new File("target/app/com"));
+		List<String> entries = new ArrayList<>();
+		entries.add("target/app");
+		for (File jar : new File("target/dependencies").listFiles()) {
+			entries.add(jar.getAbsolutePath());
+		}
+		return StringUtils.collectionToDelimitedString(entries, File.pathSeparator);
+	}
+
+	@Override
+	public String toString() {
+		return "exploded remote";
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/JarFileRemoteApplicationLauncher.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.jar.Attributes;
+import java.util.jar.JarOutputStream;
+import java.util.jar.Manifest;
+import java.util.zip.ZipEntry;
+
+import org.springframework.util.FileSystemUtils;
+import org.springframework.util.StreamUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * {@link ApplicationLauncher} that launches a remote application with its classes in a
+ * jar file.
+ *
+ * @author Andy Wilkinson
+ */
+public class JarFileRemoteApplicationLauncher extends RemoteApplicationLauncher {
+
+	@Override
+	protected String createApplicationClassPath() throws Exception {
+		File appDirectory = new File("target/app");
+		if (appDirectory.isDirectory()
+				&& !FileSystemUtils.deleteRecursively(appDirectory.toPath())) {
+			throw new IllegalStateException(
+					"Failed to delete '" + appDirectory.getAbsolutePath() + "'");
+		}
+		appDirectory.mkdirs();
+		Manifest manifest = new Manifest();
+		manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
+		JarOutputStream output = new JarOutputStream(
+				new FileOutputStream(new File(appDirectory, "app.jar")), manifest);
+		FileSystemUtils.copyRecursively(new File("target/test-classes/com"),
+				new File("target/app/com"));
+		addToJar(output, new File("target/app/"), new File("target/app/"));
+		output.close();
+		List<String> entries = new ArrayList<>();
+		entries.add("target/app/app.jar");
+		for (File jar : new File("target/dependencies").listFiles()) {
+			entries.add(jar.getAbsolutePath());
+		}
+		String classpath = StringUtils.collectionToDelimitedString(entries,
+				File.pathSeparator);
+		return classpath;
+	}
+
+	private void addToJar(JarOutputStream output, File root, File current)
+			throws IOException {
+		for (File file : current.listFiles()) {
+			if (file.isDirectory()) {
+				addToJar(output, root, file);
+			}
+			output.putNextEntry(new ZipEntry(
+					file.getAbsolutePath().substring(root.getAbsolutePath().length() + 1)
+							.replace("\\", "/") + (file.isDirectory() ? "/" : "")));
+			if (file.isFile()) {
+				StreamUtils.copy(new FileInputStream(file), output);
+			}
+			output.closeEntry();
+		}
+	}
+
+	@Override
+	public String toString() {
+		return "jar file remote";
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/JvmLauncher.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
+import org.junit.runners.model.Statement;
+
+/**
+ * JUnit {@link TestRule} that launched a JVM and redirects its output to a test
+ * method-specific location.
+ *
+ * @author Andy Wilkinson
+ */
+class JvmLauncher implements TestRule {
+
+	private File outputDirectory;
+
+	@Override
+	public Statement apply(Statement base, Description description) {
+		this.outputDirectory = new File("target/output/"
+				+ description.getMethodName().replaceAll("[^A-Za-z]+", ""));
+		this.outputDirectory.mkdirs();
+		return base;
+	}
+
+	LaunchedJvm launch(String name, String classpath, String... args) throws IOException {
+		List<String> command = new ArrayList<>(Arrays
+				.asList(System.getProperty("java.home") + "/bin/java", "-cp", classpath));
+		command.addAll(Arrays.asList(args));
+		File standardOut = new File(this.outputDirectory, name + ".out");
+		File standardError = new File(this.outputDirectory, name + ".err");
+		Process process = new ProcessBuilder(command.toArray(new String[command.size()]))
+				.redirectError(standardError).redirectOutput(standardOut).start();
+		return new LaunchedJvm(process, standardOut, standardError);
+	}
+
+	static class LaunchedJvm {
+
+		private final Process process;
+
+		private final File standardOut;
+
+		private final File standardError;
+
+		LaunchedJvm(Process process, File standardOut, File standardError) {
+			this.process = process;
+			this.standardOut = standardOut;
+			this.standardError = standardError;
+		}
+
+		Process getProcess() {
+			return this.process;
+		}
+
+		File getStandardOut() {
+			return this.standardOut;
+		}
+
+		File getStandardError() {
+			return this.standardError;
+		}
+
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/LaunchedApplication.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+
+/**
+ * An application launched by {@link ApplicationLauncher}.
+ *
+ * @author Andy Wilkinson
+ */
+class LaunchedApplication {
+
+	private final File classesDirectory;
+
+	private final File standardOut;
+
+	private final File standardError;
+
+	private final Process[] processes;
+
+	LaunchedApplication(File classesDirectory, File standardOut, File standardError,
+			Process... processes) {
+		this.classesDirectory = classesDirectory;
+		this.standardOut = standardOut;
+		this.standardError = standardError;
+		this.processes = processes;
+	}
+
+	void stop() throws InterruptedException {
+		for (Process process : this.processes) {
+			process.destroy();
+			process.waitFor();
+		}
+	}
+
+	File getStandardOut() {
+		return this.standardOut;
+	}
+
+	File getStandardError() {
+		return this.standardError;
+	}
+
+	File getClassesDirectory() {
+		return this.classesDirectory;
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/LocalApplicationLauncher.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.boot.devtools.tests.JvmLauncher.LaunchedJvm;
+import org.springframework.util.FileSystemUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * {@link ApplicationLauncher} that launches a local application with DevTools enabled.
+ *
+ * @author Andy Wilkinson
+ */
+public class LocalApplicationLauncher implements ApplicationLauncher {
+
+	@Override
+	public LaunchedApplication launchApplication(JvmLauncher jvmLauncher)
+			throws Exception {
+		LaunchedJvm jvm = jvmLauncher.launch("local", createApplicationClassPath(),
+				"com.example.DevToolsTestApplication", "--server.port=0");
+		return new LaunchedApplication(new File("target/app"), jvm.getStandardOut(),
+				jvm.getStandardError(), jvm.getProcess());
+	}
+
+	protected String createApplicationClassPath() throws Exception {
+		File appDirectory = new File("target/app");
+		FileSystemUtils.deleteRecursively(appDirectory);
+		appDirectory.mkdirs();
+		FileSystemUtils.copyRecursively(new File("target/test-classes/com"),
+				new File("target/app/com"));
+		List<String> entries = new ArrayList<>();
+		entries.add("target/app");
+		for (File jar : new File("target/dependencies").listFiles()) {
+			entries.add(jar.getAbsolutePath());
+		}
+		return StringUtils.collectionToDelimitedString(entries, File.pathSeparator);
+	}
+
+	@Override
+	public String toString() {
+		return "local";
+	}
+
+}

spring-boot-tests/spring-boot-integration-tests/spring-boot-devtools-tests/src/test/java/org/springframework/boot/devtools/tests/RemoteApplicationLauncher.java

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.devtools.tests;
+
+import java.io.File;
+import java.io.FileReader;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.boot.devtools.RemoteSpringApplication;
+import org.springframework.boot.devtools.tests.JvmLauncher.LaunchedJvm;
+import org.springframework.util.FileCopyUtils;
+import org.springframework.util.FileSystemUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * Base class for {@link ApplicationLauncher} implementations that use
+ * {@link RemoteSpringApplication}.
+ *
+ * @author Andy Wilkinson
+ */
+abstract class RemoteApplicationLauncher implements ApplicationLauncher {
+
+	@Override
+	public LaunchedApplication launchApplication(JvmLauncher javaLauncher)
+			throws Exception {
+		LaunchedJvm applicationJvm = javaLauncher.launch("app",
+				createApplicationClassPath(), "com.example.DevToolsTestApplication",
+				"--server.port=12345", "--spring.devtools.remote.secret=secret");
+		awaitServerPort(applicationJvm.getStandardOut());
+		LaunchedJvm remoteSpringApplicationJvm = javaLauncher.launch(
+				"remote-spring-application", createRemoteSpringApplicationClassPath(),
+				RemoteSpringApplication.class.getName(),
+				"--spring.devtools.remote.secret=secret", "http://localhost:12345");
+		awaitRemoteSpringApplication(remoteSpringApplicationJvm.getStandardOut());
+		return new LaunchedApplication(new File("target/remote"),
+				applicationJvm.getStandardOut(), applicationJvm.getStandardError(),
+				applicationJvm.getProcess(), remoteSpringApplicationJvm.getProcess());
+	}
+
+	protected abstract String createApplicationClassPath() throws Exception;
+
+	private String createRemoteSpringApplicationClassPath() throws Exception {
+		File remoteDirectory = new File("target/remote");
+		FileSystemUtils.deleteRecursively(remoteDirectory);
+		remoteDirectory.mkdirs();
+		FileSystemUtils.copyRecursively(new File("target/test-classes/com"),
+				new File("target/remote/com"));
+		List<String> entries = new ArrayList<>();
+		entries.add("target/remote");
+		for (File jar : new File("target/dependencies").listFiles()) {
+			entries.add(jar.getAbsolutePath());
+		}
+		return StringUtils.collectionToDelimitedString(entries, File.pathSeparator);
+	}
+
+	private int awaitServerPort(File standardOut) throws Exception {
+		long end = System.currentTimeMillis() + 30000;
+		File serverPortFile = new File("target/server.port");
+		while (serverPortFile.length() == 0) {
+			if (System.currentTimeMillis() > end) {
+				throw new IllegalStateException(String.format(
+						"server.port file was not written within 30 seconds. "
+								+ "Application output:%n%s",
+						FileCopyUtils.copyToString(new FileReader(standardOut))));
+			}
+			Thread.sleep(100);
+		}
+		FileReader portReader = new FileReader(serverPortFile);
+		int port = Integer.valueOf(FileCopyUtils.copyToString(portReader));
+		return port;
+	}
+
+	private void awaitRemoteSpringApplication(File standardOut) throws Exception {
+		long end = System.currentTimeMillis() + 30000;
+		while (!standardOut.exists()) {
+			if (System.currentTimeMillis() > end) {
+				throw new IllegalStateException(
+						"Standard out file was not written " + "within 30 seconds");
+			}
+			Thread.sleep(100);
+		}
+		while (!FileCopyUtils.copyToString(new FileReader(standardOut))
+				.contains("Started RemoteSpringApplication")) {
+			if (System.currentTimeMillis() > end) {
+				throw new IllegalStateException(
+						"RemoteSpringApplication did not start within 30 seconds");
+			}
+			Thread.sleep(100);
+		}
+	}
+
+}