Add Jackson 2 smoke tests (WIP)

Author: philwebb

settings.gradle

@@ -419,6 +419,8 @@ include ":smoke-test:spring-boot-smoke-test-graphql"
 include ":smoke-test:spring-boot-smoke-test-hateoas"
 include ":smoke-test:spring-boot-smoke-test-hibernate"
 include ":smoke-test:spring-boot-smoke-test-integration"
+include ":smoke-test:spring-boot-smoke-test-jackson2-mixed"
+include ":smoke-test:spring-boot-smoke-test-jackson2-only"
 include ":smoke-test:spring-boot-smoke-test-jetty"
 include ":smoke-test:spring-boot-smoke-test-jetty-jsp"
 include ":smoke-test:spring-boot-smoke-test-jetty-ssl"

smoke-test/spring-boot-smoke-test-jackson2-mixed/build.gradle

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2012-present 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.
+ */
+
+plugins {
+	id "java"
+}
+
+description = "Spring Boot Jackson 2 mixed with Jackson 3 smoke test"
+
+dependencies {
+	implementation(project(":module:spring-boot-jackson2"))
+	implementation(project(":starter:spring-boot-starter-actuator"))
+	implementation(project(":starter:spring-boot-starter-webmvc"))
+
+	testImplementation(project(":starter:spring-boot-starter-test"))
+	testImplementation(project(":starter:spring-boot-starter-webmvc-test"))
+}

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/java/smoketest/jackson2/mixed/Jackson2Component.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2012-present 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 smoketest.jackson2.mixed;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+
+import org.springframework.boot.jackson2.JsonComponent;
+
+@SuppressWarnings("removal")
+@JsonComponent
+public class Jackson2Component {
+
+	public static class Serializer extends JsonSerializer<Name> {
+
+		@Override
+		public void serialize(Name value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
+			gen.writeString("JACKSON2:%s:%s".formatted(value.first(), value.last()));
+		}
+
+	}
+
+}

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/java/smoketest/jackson2/mixed/JacksonComponent.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2012-present 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 smoketest.jackson2.mixed;
+
+import tools.jackson.core.JacksonException;
+import tools.jackson.core.JsonGenerator;
+import tools.jackson.databind.SerializationContext;
+import tools.jackson.databind.ValueSerializer;
+
+import org.springframework.boot.jackson.JsonComponent;
+
+@JsonComponent
+public class JacksonComponent {
+
+	public static class Serializer extends ValueSerializer<Name> {
+
+		@Override
+		public void serialize(Name value, JsonGenerator gen, SerializationContext ctxt) throws JacksonException {
+			gen.writeString("JACKSON:%s:%s".formatted(value.first(), value.last()));
+		}
+
+	}
+
+}

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/java/smoketest/jackson2/mixed/Name.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2012-present 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 smoketest.jackson2.mixed;
+
+public record Name(String first, String last) {
+
+}

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/java/smoketest/jackson2/mixed/SampleController.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2012-present 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 smoketest.jackson2.mixed;
+
+import java.util.List;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class SampleController {
+
+	@GetMapping("/names")
+	List<Name> names() {
+		return List.of(new Name("Spring", "Boot"));
+	}
+
+}

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/java/smoketest/jackson2/mixed/SampleJackson2MixedApplication.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2012-present 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 smoketest.jackson2.mixed;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
+
+@SpringBootApplication
+public class SampleJackson2MixedApplication {
+
+	public static void main(String[] args) {
+		Assert.state(ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper", null), "Expected Jackson 2");
+		Assert.state(ClassUtils.isPresent("tools.jackson.databind.ObjectMapper", null), "Expected Jackson 3");
+		SpringApplication.run(SampleJackson2MixedApplication.class, args);
+	}
+
+}

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/java/smoketest/jackson2/mixed/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-present 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.
+ */
+
+@NullMarked
+package smoketest.jackson2.mixed;
+
+import org.jspecify.annotations.NullMarked;

smoke-test/spring-boot-smoke-test-jackson2-mixed/src/main/resources/application.properties

@@ -0,0 +1 @@
+spring.http.converters.preferred-json-mapper=jackson2

smoke-test/spring-boot-smoke-test-jackson2-only/build.gradle

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2012-present 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.
+ */
+
+plugins {
+	id "java"
+}
+
+description = "Spring Boot Jackson 2 without Jackson 3 smoke test"
+
+dependencies {
+	implementation(project(":module:spring-boot-jackson2"))
+	implementation(project(":starter:spring-boot-starter-actuator"))
+	implementation(project(":starter:spring-boot-starter-webmvc")) {
+		exclude module: 'spring-boot-starter-jackson'
+	}
+
+	testImplementation(project(":starter:spring-boot-starter-test"))
+	testImplementation(project(":starter:spring-boot-starter-webmvc-test"))
+}