fixes #873, add content type to /health

CONTRIBUTING.md

@@ -22,7 +22,7 @@ All submissions, including submissions by project members, need to be reviewed b
 
 ### Continuous Integration
 
-Because we are all humans, the project use a continuous integration approach and each pull request triggers a full build.
+Because we are all humans, the project uses a continuous integration approach and each pull request triggers a full build.
 Please make sure to monitor the output of the build and act accordingly.
 
 ### Tests and documentation are not optional

extensions/smallrye-health/runtime/src/main/java/org/jboss/shamrock/smallrye/health/runtime/SmallRyeHealthServlet.java

@@ -43,6 +43,8 @@ public class SmallRyeHealthServlet extends HttpServlet {
         if (health.isDown()) {
             resp.setStatus(503);
         }
+        resp.setContentType("application/json");
+        resp.setCharacterEncoding("UTF-8");
         reporter.reportHealth(resp.getOutputStream(), health);
     }
 }

integration-tests/main/src/test/java/org/jboss/shamrock/example/test/HealthTestCase.java

@@ -19,21 +19,22 @@ package org.jboss.shamrock.example.test;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.is;
 
+import io.restassured.http.ContentType;
+import org.hamcrest.Matchers;
 import org.jboss.shamrock.test.junit.ShamrockTest;
 import org.junit.jupiter.api.Test;
 
 import io.restassured.RestAssured;
-import io.restassured.parsing.Parser;
 
 @ShamrockTest
 public class HealthTestCase {
 
     @Test
     public void testHealthCheck() {
-        // the health check does not set a content type so we need to force the parser
         try {
-            RestAssured.defaultParser = Parser.JSON;
             RestAssured.when().get("/health").then()
+                    .contentType(ContentType.JSON)
+                    .header("Content-Type", Matchers.containsString("charset=UTF-8"))
                     .body("outcome", is("UP"),
                             "checks.state", contains("UP"),
                             "checks.name", contains("basic"));