Provide better compatibility for projects migrating from OAS 3.0 to O…

…AS 3.1. Fixes #2849

springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v31/AbstractSpringDocTest.java

@@ -0,0 +1,102 @@
+/*
+ *
+ *  *
+ *  *  *
+ *  *  *  *
+ *  *  *  *  *
+ *  *  *  *  *  * Copyright 2019-2025 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 test.org.springdoc.api.v31;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import org.junit.jupiter.api.Test;
+import org.springdoc.core.utils.Constants;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.MvcResult;
+
+import static org.hamcrest.Matchers.is;
+import static org.skyscreamer.jsonassert.JSONAssert.assertEquals;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+/**
+ * The type Abstract spring doc test.
+ */
+@ActiveProfiles("test")
+@SpringBootTest
+@AutoConfigureMockMvc
+public abstract class AbstractSpringDocTest {
+
+	/**
+	 * The constant className.
+	 */
+	public static String className;
+
+	/**
+	 * The Mock mvc.
+	 */
+	@Autowired
+	protected MockMvc mockMvc;
+
+	/**
+	 * Gets content.
+	 *
+	 * @param fileName the file name
+	 * @return the content
+	 * @throws Exception the exception
+	 */
+	public static String getContent(String fileName) throws Exception {
+		try {
+			Path path = Paths.get(AbstractSpringDocTest.class.getClassLoader().getResource(fileName).toURI());
+			byte[] fileBytes = Files.readAllBytes(path);
+			return new String(fileBytes, StandardCharsets.UTF_8);
+		}
+		catch (Exception e) {
+			throw new RuntimeException("Failed to read file: " + fileName, e);
+		}
+	}
+
+	/**
+	 * Test app.
+	 *
+	 * @throws Exception the exception
+	 */
+	@Test
+	protected void testApp() throws Exception {
+		className = getClass().getSimpleName();
+		String testNumber = className.replaceAll("[^0-9]", "");
+		MvcResult mockMvcResult = mockMvc.perform(get(Constants.DEFAULT_API_DOCS_URL)).andExpect(status().isOk())
+				.andExpect(jsonPath("$.openapi", is("3.1.0"))).andReturn();
+		String result = mockMvcResult.getResponse().getContentAsString();
+		String expected = getContent("results/3.1.0/app" + testNumber + ".json");
+		assertEquals(expected, result, true);
+	}
+}

springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v31/app1/ApiException.java

@@ -0,0 +1,56 @@
+/*
+ *
+ *  *
+ *  *  *
+ *  *  *  *
+ *  *  *  *  *
+ *  *  *  *  *  * Copyright 2019-2025 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 test.org.springdoc.api.v31.app1;
+
+/**
+ * The type Api exception.
+ */
+public final class ApiException extends Exception {
+
+	/**
+	 * The constant serialVersionUID.
+	 */
+	private static final long serialVersionUID = 1L;
+
+	/**
+	 * The Code.
+	 */
+	@SuppressWarnings("unused")
+
+	private final int code;
+
+	/**
+	 * Instantiates a new Api exception.
+	 *
+	 * @param code the code
+	 * @param msg the msg
+	 */
+	public ApiException(int code, String msg) {
+		super(msg);
+		this.code = code;
+	}
+}

springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v31/app1/ApiOriginFilter.java

@@ -0,0 +1,77 @@
+/*
+ *
+ *  *
+ *  *  *
+ *  *  *  *
+ *  *  *  *  *
+ *  *  *  *  *  * Copyright 2019-2025 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 test.org.springdoc.api.v31.app1;
+
+import java.io.IOException;
+
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.FilterConfig;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletRequest;
+import jakarta.servlet.ServletResponse;
+import jakarta.servlet.http.HttpServletResponse;
+
+/**
+ * The type Api origin filter.
+ */
+class ApiOriginFilter implements jakarta.servlet.Filter {
+	/**
+	 * Do filter.
+	 *
+	 * @param request the request
+	 * @param response the response
+	 * @param chain the chain
+	 * @throws IOException the io exception
+	 * @throws ServletException the servlet exception
+	 */
+	@Override
+	public void doFilter(ServletRequest request, ServletResponse response,
+			FilterChain chain) throws IOException, ServletException {
+		HttpServletResponse res = (HttpServletResponse) response;
+		res.addHeader("Access-Control-Allow-Origin", "*");
+		res.addHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
+		res.addHeader("Access-Control-Allow-Headers", "Content-Type");
+		chain.doFilter(request, response);
+	}
+
+	/**
+	 * Destroy.
+	 */
+	@Override
+	public void destroy() {
+	}
+
+	/**
+	 * Init.
+	 *
+	 * @param filterConfig the filter config
+	 * @throws ServletException the servlet exception
+	 */
+	@Override
+	public void init(FilterConfig filterConfig) throws ServletException {
+	}
+}