[MOD] XQuery, file:delete: ignore non-existing paths. qtspecs#2547

Author: ChristianGruen

basex-core/src/main/java/org/basex/query/func/file/FileDelete.java

@@ -20,16 +20,18 @@ public Value eval(final QueryContext qc) throws QueryException, IOException {
     final Path path = toPath(arg(0), qc);
     final boolean recursive = toBooleanOrFalse(arg(1), qc);
 
-    if(recursive) {
-      delete(path, qc);
-    } else {
-      Files.delete(path);
+    if(Files.exists(path)) {
+      if(recursive) {
+        delete(path, qc);
+      } else {
+        Files.delete(path);
+      }
     }
     return Empty.VALUE;
   }
 
   /**
-   * Recursively deletes a file path.
+   * Deletes a path recursively.
    * @param path path to be deleted
    * @param job job
    * @throws IOException I/O exception

basex-core/src/test/java/org/basex/query/func/FileModuleTest.java

@@ -202,7 +202,9 @@ public final class FileModuleTest extends SandboxTest {
     query(_FILE_CREATE_DIR.args(PATH3));
     query(_FILE_WRITE.args(PATH4, " ()"));
     query(func.args(PATH1, true));
-    error(func.args(PATH1), FILE_NOT_FOUND_X);
+    // raise no error if file does not exist
+    query(func.args(PATH1, true));
+    query(func.args(PATH1));
   }
 
   /** Test method. */