fix(test): Fix test about default storage type for DefaultStorageMediaProviderTest (#2419)

### What changes were proposed in this pull request?
This part of testStorageProvider should test the default storage media for a non-existent directory. But 47cac39 changed the behavior of getStorageMediaFor, now it checks the parent directory (recursively) so for /path/to/base/dir it will end up checking / which is existent. With this change it will check path which is missing, so it will really check the default value.

### Why are the changes needed?

### Does this PR introduce any user-facing change?
No.

### How was this patch tested?
UT

Author: asalamon74

storage/src/main/java/org/apache/uniffle/storage/common/DefaultStorageMediaProvider.java

@@ -24,6 +24,7 @@
 import java.nio.file.FileStore;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.List;
 
@@ -40,6 +41,7 @@ public class DefaultStorageMediaProvider implements StorageMediaProvider {
   private static final String NUMBERIC_STRING = "0123456789";
   private static final String BLOCK_PATH_FORMAT = "/sys/block/%s/queue/rotational";
   private static final String HDFS = "hdfs";
+  private static final String FILE = "file";
   private static final List<String> OBJECT_STORE_SCHEMAS =
       Arrays.asList("s3", "oss", "cos", "gcs", "obs", "daos");
 
@@ -64,6 +66,13 @@ public StorageMedia getStorageMediaFor(String baseDir) {
       try {
         File baseFile = new File(baseDir);
         FileStore store = getFileStore(baseFile.toPath());
+        if (store == null) {
+          URI uri = new URI(baseDir);
+          String scheme = uri.getScheme();
+          if (FILE.equals(scheme)) {
+            store = getFileStore(Paths.get(uri));
+          }
+        }
         if (store == null) {
           throw new IOException("Can't get FileStore for path:" + baseFile.getAbsolutePath());
         }
@@ -81,8 +90,8 @@ public StorageMedia getStorageMediaFor(String baseDir) {
             }
           }
         }
-      } catch (IOException ioe) {
-        logger.warn("Get storage type failed with exception", ioe);
+      } catch (IOException | URISyntaxException e) {
+        logger.warn("Get storage type failed with exception", e);
       }
     }
     logger.info("Default storage type provider returns HDD by default");

storage/src/test/java/org/apache/uniffle/storage/common/DefaultStorageMediaProviderTest.java

@@ -40,8 +40,9 @@ public void testStorageProvider() {
         StorageMedia.OBJECT_STORE, provider.getStorageMediaFor("cos://bucket-name/b/path"));
 
     // by default, the local file should report as HDD
-    assertEquals(StorageMedia.HDD, provider.getStorageMediaFor("/path/to/base/dir"));
-    assertEquals(StorageMedia.HDD, provider.getStorageMediaFor("file:///path/to/a/dir"));
+    assertEquals(StorageMedia.HDD, provider.getStorageMediaFor("path/to/base/dir"));
+    assertEquals(
+        provider.getStorageMediaFor("/"), provider.getStorageMediaFor("file:///path/to/a/dir"));
 
     // invalid uri should also be reported as HDD
     assertEquals(StorageMedia.HDD, provider.getStorageMediaFor("file@xx:///path/to/a"));