@Test
    @DisplayName("refresh succeeds when not configured to fail")
    void refresh_success() throws Exception {
        TestCredentials creds = new TestCredentials("Z", false, false, new Subject(), false);
        // Should not throw
        assertDoesNotThrow(creds::refresh);
    }

    @Test
    @DisplayName("refresh throws CIFSException when configured to fail")
    void refresh_failure_throws_cifs() {

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

     */
    int FLAGS_VERIFY_ALL_WRITES = 0x0010;
    /**
     * Copy entire tree flag.
     */
    int FLAGS_TREE_COPY = 0x0020;

    // open function
    /**
     * Open function to fail if file exists.
     */
    int OPEN_FUNCTION_FAIL_IF_EXISTS = 0x0000;
    /**
     * Open function to overwrite if file exists.
     */
    int OPEN_FUNCTION_OVERWRITE_IF_EXISTS = 0x0020;

    /**

            fail("Should throw IllegalArgumentException");
        } catch (IllegalArgumentException e) {
            assertEquals("name or dataStore is null.", e.getMessage());
        }
    }

    // Test add method with both null parameters
    public void test_add_bothNull() {
        try {
            dataStoreFactory.add(null, null);
            fail("Should throw IllegalArgumentException");

            QueryContext context = new QueryContext("test", false);
            Query invalidQuery = new TermQuery(new Term("field", "value"));
            queryCommand.execute(context, invalidQuery, 1.0f);
            fail();
        } catch (InvalidQueryException e) {
            // expected
            assertTrue(e.getMessage().contains("Unknown q:"));
        }
    }

      }
    }
  }

  private static void assertContains(String expectedSubstring, String actual) {
    // TODO(kevinb): use a Truth assertion here
    if (!actual.contains(expectedSubstring)) {
      fail("expected <" + actual + "> to contain <" + expectedSubstring + ">");
    }
  }

        // First call (odd) should succeed
        String result1 = aggregateLogJob.execute();
        assertEquals("", result1);

        // Second call (even) should fail
        String result2 = aggregateLogJob.execute();
        assertTrue(result2.contains("Even call error"));

        // Third call (odd) should succeed
        String result3 = aggregateLogJob.execute();

        try {
            PrunedTag.parse("invalid_format_with_special_chars@#$%");
            fail("Should have thrown FessSystemException");
        } catch (FessSystemException e) {
            assertTrue(e.getMessage().contains("Invalid pruned tag"));
        }

        try {
            PrunedTag.parse("[invalid]");
            fail("Should have thrown FessSystemException");
        } catch (FessSystemException e) {

 * avoiding these options entirely, this class allows a connection to be attempted with modern
 * options and then retried without them should the attempt fail.
 *
 * ## Connection Reuse
 *
 * Each connection can carry a varying number of streams, depending on the underlying protocol being

   * Connections will still be closed if they idle beyond the keep-alive but will be replaced.
   */
  @JvmField val minimumConcurrentCalls: Int = 0,
  /** How long to wait to retry pre-emptive connection attempts that fail. */
  @JvmField val backoffDelayMillis: Long = 60 * 1000,
  /** How much jitter to introduce in connection retry backoff delays */
  @JvmField val backoffJitterMillis: Int = 100,