Add test coverage for QUARKUS-4430

monitoring/micrometer-prometheus/src/main/java/io/quarkus/ts/micrometer/prometheus/PathPatternResource.java

@@ -0,0 +1,44 @@
+package io.quarkus.ts.micrometer.prometheus;
+
+import java.net.URI;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.PathParam;
+import jakarta.ws.rs.core.Response;
+
+@Path("/test")
+public class PathPatternResource {
+    @GET
+    @Path("/redirect")
+    public Response redirect() {
+        return Response.status(Response.Status.FOUND) //302
+                .location(URI.create("/new-location"))
+                .build();
+    }
+
+    @GET
+    @Path("/not-found")
+    public Response notFound() {
+        return Response.status(Response.Status.NOT_FOUND).build(); //404
+    }
+
+    @GET
+    @Path("/not-found/{uri}")
+    public Response notFoundUri(@PathParam("uri") String uri) {
+        return Response.status(Response.Status.NOT_FOUND).build(); //404
+    }
+
+    @GET
+    @Path("/moved/{id}")
+    public Response moved(@PathParam("id") String id) {
+        return Response.status(Response.Status.MOVED_PERMANENTLY).build(); // 301
+    }
+
+    @GET
+    @Path("")
+    public Response emptyPath() {
+        return Response.status(Response.Status.NO_CONTENT).build(); //204
+    }
+
+}

monitoring/micrometer-prometheus/src/test/java/io/quarkus/ts/micrometer/prometheus/HttpPathMetricsPatternIT.java

@@ -0,0 +1,112 @@
+package io.quarkus.ts.micrometer.prometheus;
+
+import static io.restassured.RestAssured.given;
+import static org.awaitility.Awaitility.await;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.http.HttpStatus;
+import org.junit.jupiter.api.Test;
+
+import io.quarkus.test.bootstrap.RestService;
+import io.quarkus.test.scenarios.QuarkusScenario;
+import io.quarkus.test.services.QuarkusApplication;
+
+@QuarkusScenario
+public class HttpPathMetricsPatternIT {
+
+    private static final int ASSERT_METRICS_TIMEOUT_SECONDS = 30;
+    private static final List<String> HTTP_SERVER_REQUESTS_METRICS_SUFFIX = Arrays.asList("count", "sum", "max");
+    private static final String HTTP_SERVER_REQUESTS_METRICS_FORMAT = "http_server_requests_seconds_%s{method=\"GET\",outcome=\"%s\",status=\"%d\",uri=\"%s\"}";
+    private static final String REDIRECT_ENDPOINT = "/test/redirect";
+    private static final String NOT_FOUND_ENDPOINT = "/test/not-found";
+    private static final String NOT_FOUND_URI_ENDPOINT = "/test/not-found/{uri}";
+    private static final String MOVED_ENDPOINT = "/test/moved/{id}";
+    private static final String EMPTY_ENDPOINT = "/test";
+
+    @QuarkusApplication
+    static RestService app = new RestService()
+            .withProperty("quarkus.management.enabled", "true");
+
+    @Test
+    public void verifyNotFoundInMetrics() {
+        whenCallNotFoundEndpoint();
+        thenMetricIsExposedInServiceEndpoint(404, "CLIENT_ERROR", "NOT_FOUND");
+    }
+
+    @Test
+    public void verifyUriNotFoundInMetrics() {
+        whenCallNotFoundWithParamEndpoint("/url123");
+        thenMetricIsExposedInServiceEndpoint(404, "CLIENT_ERROR", NOT_FOUND_URI_ENDPOINT);
+    }
+
+    @Test
+    public void verifyRedirectionInMetrtics() {
+        whenCallRedirectEndpoint();
+        thenMetricIsExposedInServiceEndpoint(302, "REDIRECTION", "REDIRECTION");
+    }
+
+    @Test
+    public void verifyEmptyPathInMetrics() {
+        whenCallEmptyPathEndpoint();
+        thenMetricIsExposedInServiceEndpoint(204, "SUCCESS", EMPTY_ENDPOINT);
+    }
+
+    @Test
+    public void verifyDynamicRedirectionInMetrics() {
+        String id = "41";
+        whenCallDynamicSegmentEndpoint(id);
+        thenMetricIsExposedInServiceEndpoint(301, "REDIRECTION", MOVED_ENDPOINT);
+    }
+
+    private void whenCallRedirectEndpoint() {
+        given()
+                .redirects().follow(false)
+                .when().get(REDIRECT_ENDPOINT)
+                .then().statusCode(302);
+    }
+
+    private void whenCallEmptyPathEndpoint() {
+        given()
+                .when().get("/test")
+                .then().statusCode(HttpStatus.SC_NO_CONTENT);
+    }
+
+    private void whenCallNotFoundEndpoint() {
+        given()
+                .when().get(NOT_FOUND_ENDPOINT)
+                .then().statusCode(HttpStatus.SC_NOT_FOUND);
+    }
+
+    private void whenCallNotFoundWithParamEndpoint(String url) {
+        given()
+                .pathParam("uri", url)
+                .redirects().follow(false)
+                .when().get(NOT_FOUND_URI_ENDPOINT)
+                .then().statusCode(HttpStatus.SC_NOT_FOUND);
+    }
+
+    private void whenCallDynamicSegmentEndpoint(String id) {
+        given()
+                .pathParam("id", id)
+                .redirects().follow(false)
+                .when().get(MOVED_ENDPOINT)
+                .then().statusCode(HttpStatus.SC_MOVED_PERMANENTLY);
+    }
+
+    private void thenMetricIsExposedInServiceEndpoint(int statusCode, String outcome, String uri) {
+        await().ignoreExceptions().atMost(ASSERT_METRICS_TIMEOUT_SECONDS, TimeUnit.SECONDS).untilAsserted(() -> {
+            String metrics = app.management().get("/q/metrics").then()
+                    .statusCode(HttpStatus.SC_OK).extract().asString();
+            for (String metricSuffix : HTTP_SERVER_REQUESTS_METRICS_SUFFIX) {
+                String metric = String.format(HTTP_SERVER_REQUESTS_METRICS_FORMAT, metricSuffix, outcome, statusCode, uri);
+
+                assertTrue(metrics.contains(metric), "Expected metric : " + metric + ". Metrics: " + metrics);
+            }
+        });
+    }
+
+}