test for issue #1509

Author: gracekarina

Diff for: modules/swagger-parser-v3/src/test/java/io/swagger/v3/parser/test/OpenAPIV3ParserTest.java

@@ -82,6 +82,16 @@ public class OpenAPIV3ParserTest {
     protected int serverPort = getDynamicPort();
     protected WireMockServer wireMockServer;
 
+    @Test
+    public void testServerRelativeUrl(){
+        String url = "https://petstore3.swagger.io/api/v3/openapi.json";
+        ParseOptions options = new ParseOptions();
+        options.setResolve(true);
+        SwaggerParseResult result = new OpenAPIV3Parser().readLocation(url,new ArrayList<>(),options);
+        assertTrue(result.getMessages().isEmpty());
+    }
+
+
     @Test
     public void testIssue1398() {
         ParseOptions options = new ParseOptions();