assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        data = "<img src=\"http://example/foo.jpg\" width=\"x\" height=\"x\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        data = "<img src=\"http://example/foo.jpg\" width=\"10\" height=\"100\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        ComponentUtil.setFessConfig(null);
        super.tearDown();
    }

    public void test_evaluate() {
        final Map<String, Object> params = new HashMap<>();
        assertNull(groovyEngine.evaluate("", params));
        assertEquals("", groovyEngine.evaluate("return ''", params));
        assertEquals(1, groovyEngine.evaluate("return 1", params));

        params.put("test", "123");

        final Object rawData = new Object();

        // ## Act ##
        resultData.setRawData(rawData);

        // ## Assert ##
        assertEquals(rawData, resultData.getRawData());

        assertNull(resultData.serializer);
        try {
            resultData.getData();
            fail();
        } catch (CrawlerSystemException e) {
            // nothing
        }
    }

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Date;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNotSame;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;

import java.util.Arrays;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

        System.clearProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);

        try {
            String result = SystemUtil.getSearchEngineHttpAddress();
            assertNull(result);
        } finally {
            // Restore original value if it existed
            if (originalValue != null) {
                System.setProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS, originalValue);

        assertEquals(false, charmappingpager.isExistNextPage());
        assertEquals(25, charmappingpager.getPageSize());
        assertEquals(1, charmappingpager.getCurrentPageNumber());
        assertNull(charmappingpager.id);

        assertEquals(25, charmappingpager.getDefaultPageSize());
        assertEquals(1, charmappingpager.getDefaultCurrentPageNumber());

        charmappingpager.setAllRecordCount(999);

        assertEquals(1, helper.duplicateHostList.size());
        assertEquals("www.test.com", helper.duplicateHostList.get(0).getRegularName());
    }

    public void test_convert_nullUrl() {
        assertNull(duplicateHostHelper.convert(null));
    }

    public void test_convert_withNullList() {
        DuplicateHostHelper helper = new DuplicateHostHelper();
        helper.duplicateHostList = null;

                    }));
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testMergePresentToNull() {
    assertNull(
        "Map.merge(present, value, functionReturningNull) should return null",
        getMap()
            .merge(
                k0(),
                v3(),
                (oldV, newV) -> {

    if (chunk1 > 0) {
      write(out, data, 0, chunk1, singleByte);
      assertTrue(ByteSource.wrap(data).slice(0, chunk1).contentEquals(source));
    }
    File file = out.getFile();
    assertNull(file);

    // Write data to go over the threshold
    if (chunk2 > 0) {
      if (JAVA_IO_TMPDIR.value().equals("/sdcard")) {
        assertThrows(IOException.class, () -> write(out, data, chunk1, chunk2, singleByte));