Add a test case that test returning a large file using RestResponse

Author: geoand

extensions/resteasy-reactive/rest/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/providers/FileResource.java

@@ -1,10 +1,13 @@
 package io.quarkus.resteasy.reactive.server.test.providers;
 
 import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
 import java.nio.file.Paths;
 
 import jakarta.ws.rs.GET;
 import jakarta.ws.rs.Path;
+import jakarta.ws.rs.core.HttpHeaders;
 
 import org.jboss.resteasy.reactive.FilePart;
 import org.jboss.resteasy.reactive.PathPart;
@@ -91,4 +94,19 @@ public Uni<AsyncFile> getAsyncFilePartial(RoutingContext vertxRequest) {
             });
         });
     }
+
+    static final long ONE_GIGA = 1024L * 1024L * 1024L;
+
+    @Path("large-path-rest-response")
+    @GET
+    public RestResponse<java.nio.file.Path> largePathRestResponse() throws IOException {
+        File largeFile = File.createTempFile("rr-large-file-rest-response", ".tmp");
+        largeFile.deleteOnExit();
+        RandomAccessFile f = new RandomAccessFile(largeFile, "rw");
+        f.setLength(ONE_GIGA);
+
+        return RestResponse.ResponseBuilder.ok(largeFile.toPath())
+                .header(HttpHeaders.CONTENT_DISPOSITION, "large-file")
+                .build();
+    }
 }

extensions/resteasy-reactive/rest/deployment/src/test/java/io/quarkus/resteasy/reactive/server/test/providers/FileTestCase.java

@@ -14,6 +14,7 @@
 import org.jboss.resteasy.reactive.PathPart;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledIfSystemProperty;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
 import io.quarkus.test.QuarkusUnitTest;
@@ -168,4 +169,16 @@ public void testChecks() throws IOException {
         } catch (IllegalArgumentException x) {
         }
     }
+
+    @EnabledIfSystemProperty(named = "test-resteasy-reactive-large-files", matches = "true")
+    @Test
+    public void testWithLargeFile() {
+        RestAssured.given()
+                .get("/providers/file/large-path-rest-response")
+                .then()
+                .statusCode(200)
+                .contentType("application/octet-stream")
+                .header(HttpHeaders.CONTENT_DISPOSITION, "large-file")
+                .header(HttpHeaders.CONTENT_LENGTH, "1073741824");
+    }
 }