Introduce Jetty sample

framework/webmvc-jetty/README.adoc

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+Tests if WebMVC with Jetty is working.

framework/webmvc-jetty/build.gradle

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+plugins {
+	id "java"
+	id "org.springframework.boot"
+	id "org.springframework.cr.smoke-test"
+}
+
+dependencies {
+	implementation(platform(org.springframework.boot.gradle.plugin.SpringBootPlugin.BOM_COORDINATES))
+	implementation("org.springframework.boot:spring-boot-starter-web")
+	implementation("org.springframework.boot:spring-boot-starter-jetty")
+	modules {
+		module("org.springframework.boot:spring-boot-starter-tomcat") {
+			replacedBy("org.springframework.boot:spring-boot-starter-jetty", "Use Jetty instead of Tomcat")
+		}
+	}
+	// Downgrade for Jetty, see https://github.com/spring-projects/spring-boot/issues/33044
+	implementation("jakarta.servlet:jakarta.servlet-api") {
+		version {
+			strictly "5.0.0"
+		}
+	}
+	implementation("org.crac:crac:0.1.3")
+
+	testImplementation("org.springframework.boot:spring-boot-starter-test")
+
+	appTestImplementation(project(":cr-smoke-test-support"))
+}
+
+crSmokeTest {
+	webApplication = true
+}

framework/webmvc-jetty/src/appTest/java/com/example/webmvc/WebMvcApplicationTests.java

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+/*
+ * Copyright 2022 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
+ *
+ *      https://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.webmvc;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.cr.smoketest.support.junit.ApplicationTest;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ApplicationTest
+class WebMvcApplicationTests {
+
+	@Test
+	void stringResponseBody(WebTestClient client) {
+		client.get()
+			.exchange()
+			.expectStatus()
+			.isOk()
+			.expectBody()
+			.consumeWith((result) -> assertThat(new String(result.getResponseBodyContent()))
+				.isEqualTo("Hello from Spring MVC and Jetty"));
+	}
+
+	@Test
+	void resourceInStatic(WebTestClient client) {
+		client.get()
+			.uri("foo.html")
+			.exchange()
+			.expectStatus()
+			.isOk()
+			.expectBody()
+			.consumeWith((result) -> assertThat(new String(result.getResponseBodyContent())).isEqualTo("Foo"));
+	}
+
+}

framework/webmvc-jetty/src/main/java/com/example/webmvc/WebMvcApplication.java

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+package com.example.webmvc;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class WebMvcApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(WebMvcApplication.class, args);
+	}
+
+}

framework/webmvc-jetty/src/main/java/com/example/webmvc/WebMvcController.java

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+package com.example.webmvc;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class WebMvcController {
+
+	@GetMapping("/")
+	public String hello() {
+		return "Hello from Spring MVC and Jetty";
+	}
+
+}

framework/webmvc-jetty/src/main/resources/static/foo.html

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+Foo

framework/webmvc-jetty/src/test/java/com/example/webmvc/RandomPortTests.java

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+package com.example.webmvc;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.http.ResponseEntity;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+
+@SpringBootTest(webEnvironment = RANDOM_PORT)
+class RandomPortTests {
+
+	@LocalServerPort
+	private int port;
+
+	@Autowired
+	private TestRestTemplate template;
+
+	@Test
+	void check() {
+		assertThat(this.port).isNotZero();
+	}
+
+	@Test
+	void stringResponseBody() {
+		ResponseEntity<String> response = this.template.getForEntity("/", String.class);
+		assertThat(response.getBody()).isEqualTo("Hello from Spring MVC and Jetty");
+	}
+
+	@Test
+	void resourceInStatic() {
+		ResponseEntity<String> response = this.template.getForEntity("/foo.html", String.class);
+		assertThat(response.getBody()).isEqualTo("Foo");
+	}
+
+}