[FLINK-23630][tests] Make EventTimeWindowCheckpointingITCase run on W…

…indows.

This fixes the creation of Paths to be properly platform independent.

flink-tests/src/test/java/org/apache/flink/test/checkpointing/EventTimeWindowCheckpointingITCase.java

@@ -175,8 +175,8 @@ private Configuration getConfiguration() throws Exception {
  break;
  case FILE:
  {
- String backups = tempFolder.newFolder().getAbsolutePath();
- this.stateBackend = new FsStateBackend("file:https://" + backups);
+ final File backups = tempFolder.newFolder().getAbsoluteFile();
+ this.stateBackend = new FsStateBackend(Path.fromLocalFile(backups));
  break;
  }
  case ROCKSDB_FULL:
@@ -216,14 +216,13 @@ private void setupRocksDB(
  TaskManagerOptions.MANAGED_MEMORY_SIZE,
  MemorySize.ofMebiBytes(PARALLELISM / NUM_OF_TASK_MANAGERS * 64));
 
- String rocksDb = tempFolder.newFolder().getAbsolutePath();
- String backups = tempFolder.newFolder().getAbsolutePath();
+ final String rocksDb = tempFolder.newFolder().getAbsolutePath();
+ final File backups = tempFolder.newFolder().getAbsoluteFile();
  // we use the fs backend with small threshold here to test the behaviour with file
  // references, not self contained byte handles
  RocksDBStateBackend rdb =
  new RocksDBStateBackend(
- new FsStateBackend(
- new Path("file:https://" + backups).toUri(), fileSizeThreshold),
+ new FsStateBackend(Path.fromLocalFile(backups).toUri(), fileSizeThreshold),
  incrementalCheckpoints);
  rdb.setDbStoragePath(rocksDb);
  this.stateBackend = rdb;