FessCrawlerThread crawlerThread = new FessCrawlerThread();

        Set<RequestData> result = crawlerThread.getAnchorSet("");
        assertNull(result, "getAnchorSet should return null for blank string");

        result = crawlerThread.getAnchorSet("   ");
        assertNull(result, "getAnchorSet should return null for whitespace string");
    }

    /**
     * Test getAnchorSet with list of URLs
     */

import okhttp3.internal.platform.android.StandardAndroidSocketAdapter
import org.conscrypt.Conscrypt
import org.junit.Assert.assertFalse
import org.junit.Assert.assertNotNull
import org.junit.Assert.assertNull
import org.junit.Assert.assertTrue
import org.junit.Assume.assumeFalse
import org.junit.Assume.assumeTrue
import org.junit.Test
import org.junit.runner.RunWith
import org.robolectric.ParameterizedRobolectricTestRunner

        assertNotNull(info502);
        // Initial state of ShareInfo502 fields
        assertNull(info502.netname);
        assertNull(info502.remark);
        assertNull(info502.path);
        assertNull(info502.password);
        assertNull(info502.security_descriptor);
        assertEquals(0, info502.type);
        assertEquals(0, info502.permissions);

        assertNull(pathMappingHelper.getPathMappingList(sessionId));
        assertNull(pathMappingHelper.getPathMappingList(sessionId + "1"));
        pathMappingHelper.setPathMappingList(sessionId, pathMappingList);
        assertNotNull(pathMappingHelper.getPathMappingList(sessionId));
        assertNull(pathMappingHelper.getPathMappingList(sessionId + "1"));

        UserRoleLoginException exception = new UserRoleLoginException(RootAction.class);
        assertNull(exception.getMessage());
    }

    @Test
    public void test_getCause() {
        // Test that getCause returns null (no cause set in constructor)
        UserRoleLoginException exception = new UserRoleLoginException(RootAction.class);
        assertNull(exception.getCause());
    }

    @Test
    public void test_throwAndCatch() {

        assertEquals(2, synonymItem.getOutputs().length);
        assertEquals("b", synonymItem.getOutputs()[0]);
        assertEquals("B", synonymItem.getOutputs()[1]);
        assertNull(synonymItem.getNewInputs());
        assertNull(synonymItem.getNewOutputs());
        assertFalse(synonymItem.isUpdated());
        assertFalse(synonymItem.isDeleted());

        synonymItem.setNewInputs(new String[] { "1", "2" });

    expectReplacement(entry(k0(), v3()));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPut_supportedNotPresent() {
    assertNull("put(notPresent, value) should return null", put(e3()));
    expectAdded(e3());
  }

  @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_PUT})
  @CollectionSize.Require(absent = ZERO)

    void testDefaultConstructor() {
        SecurityDescriptor sd = new SecurityDescriptor();
        assertEquals(0, sd.getType());
        assertNull(sd.getAces());
        assertNull(sd.getOwnerUserSid());
        assertNull(sd.getOwnerGroupSid());
    }

    @Test
    @DisplayName("Test constructor with buffer decodes SecurityDescriptor")
    void testConstructorWithBuffer() throws IOException {

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.when;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

            // Verify parent groupId and version were removed (since child doesn't have explicit ones)
            assertNull(parentElement.child("groupId").orElse(null));
            assertNull(parentElement.child("version").orElse(null));
            // artifactId should also be removed since parent POM is in pomMap
            assertNull(parentElement.child("artifactId").orElse(null));
        }

        @Test