[FLINK-11903][tests] Improve FileStateBackendTest by using JUnit's pa…

…rameterized

This closes apache#7973.

flink-runtime/src/test/java/org/apache/flink/runtime/state/FileStateBackendTest.java

@@ -24,26 +24,35 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
 
 import java.io.File;
+import java.util.Arrays;
+import java.util.List;
 
 /**
  * Tests for the keyed state backend and operator state backend, as created by the
  * {@link FsStateBackend}.
  */
+@RunWith(Parameterized.class)
 public class FileStateBackendTest extends StateBackendTestBase<FsStateBackend> {
 
+ @Parameterized.Parameters
+ public static List<Boolean> modes() {
+ return Arrays.asList(true, false);
+ }
+
+ @Parameterized.Parameter
+ public boolean useAsyncMode;
+
  @Rule
  public final TemporaryFolder tempFolder = new TemporaryFolder();
 
  @Override
  protected FsStateBackend getStateBackend() throws Exception {
  File checkpointPath = tempFolder.newFolder();
- return new FsStateBackend(checkpointPath.toURI(), useAsyncMode());
- }
-
- protected boolean useAsyncMode() {
- return false;
+ return new FsStateBackend(checkpointPath.toURI(), useAsyncMode);
  }
 
  @Override