/**
 * Extracts text content from an input stream as plain text.
 */
public class TextExtractor extends AbstractExtractor {

    /**
     * The encoding for text.
     */
    protected String encoding = Constants.UTF_8;

    /**
     * Creates a new TextExtractor instance.
     */
    public TextExtractor() {
        super();
    }

    @Override

        final String originalEncoding = textExtractor.getEncoding();
        assertEquals("UTF-8", originalEncoding);

        textExtractor.setEncoding("ISO-8859-1");
        assertEquals("ISO-8859-1", textExtractor.getEncoding());

        // Reset
        textExtractor.setEncoding("UTF-8");
        assertEquals("UTF-8", textExtractor.getEncoding());
    }

    /**

    public TextExtractor textExtractor;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        StandardCrawlerContainer container = new StandardCrawlerContainer().singleton("textExtractor", TextExtractor.class);
        textExtractor = container.getComponent("textExtractor");
    }

    public void test_getText() {

        }
    }

    /**
     * Test that TextExtractor throws exception with encoding information.
     */
    public void test_TextExtractor_includesEncodingInErrorMessage() {
        final TextExtractor extractor = container.getComponent("textExtractor");
        // Create a stream that will cause an encoding error
        final InputStream errorStream = new InputStream() {

                    final TextExtractor textExtractor = container.getComponent("textExtractor");
                    final ZipExtractor zipExtractor = container.getComponent("zipExtractor");
                    final TarExtractor tarExtractor = container.getComponent("tarExtractor");
                    factory.addExtractor("text/plain", textExtractor);
                    factory.addExtractor("text/html", tikaExtractor);

- Improved error messages with context
- Input validation using `validateInputStream()`

**Covered Extractors**:
- MsWordExtractor
- MsExcelExtractor
- MsPowerPointExtractor
- TextExtractor

**Test Count**: 8 tests

**Key Scenarios**:
- ✅ Successful extraction closes resources properly
- ✅ Failed extraction includes descriptive error messages
- ✅ Null input stream validation

		class="org.codelibs.fess.crawler.extractor.impl.PdfExtractor" />
	<component name="lhaExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.LhaExtractor" />
	<component name="textExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.TextExtractor" />
	<component name="htmlExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.HtmlExtractor">
		<property name="featureMap">
			<component class="java.util.LinkedHashMap">

        public void testValidateInputStream(final InputStream in) {
            validateInputStream(in);
        }
    }

    private TestExtractor extractor;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        extractor = new TestExtractor();
    }

    /**
     * Test that validateInputStream accepts non-null input streams.
     */