return nil, err
	}
	return bytes.TrimSpace(out), nil
}

func getLines(cmd *exec.Cmd) [][]byte {
	out := output(cmd)
	lines := bytes.Split(out, []byte("\n"))
	// Skip the empty line at the end.
	if len(lines[len(lines)-1]) == 0 {
		lines = lines[:len(lines)-1]
	}
	return lines
}

func output(cmd *exec.Cmd) []byte {
	out, err := cmd.Output()
	if err != nil {
		fmt.Println(strings.Join(cmd.Args, "\n"))

    }
    return stringSuite;
  }

  private final ImmutableList<String> lines;
  private final ImmutableList<String> expectedLines;

  private CharSink sink;

  public CharSinkTester(
      CharSinkFactory factory, String string, String suiteName, String caseDesc, Method method) {
    super(factory, string, suiteName, caseDesc, method);
    this.lines = getLines(string);
    this.expectedLines = getLines(expected);
  }

    TestCharSource lines = new TestCharSource(LINES);
    assertThat(lines.readFirstLine()).isEqualTo("foo");
    assertTrue(lines.wasStreamOpened() && lines.wasStreamClosed());
  }

  public void testReadLines_toList() throws IOException {
    TestCharSource lines = new TestCharSource(LINES);
    assertEquals(ImmutableList.of("foo", "bar", "baz", "something"), lines.readLines());

    ): BuildFileMutation {
        val lines = buildFile.readText().lines()

        val start = lines.indexOfFirst {
            Regex("\\s+computedRuntimes\\s+\\{").matches(it)
        }
        if (start == -1) {
            return BuildFileMutation.Failure("Missing computedRuntimes block for $projectPath: ${buildFile.asClickableFileUrl()}")
        }

        val end = lines.indexOfFirst(start + 1) {

    }
    lineBuf.finish();
    return lines;
  }

  private static List<String> readUsingJava(String input, int chunk) throws IOException {
    BufferedReader r = new BufferedReader(getChunkedReader(input, chunk));
    List<String> lines = new ArrayList<>();
    String line;
    while ((line = r.readLine()) != null) {
      lines.add(line);
    }
    r.close();
    return lines;
  }

import org.apache.logging.log4j.Logger;

/**
 * A thread that reads from an input stream line by line and maintains a buffer of recent lines.
 * This class provides functionality to read input stream data asynchronously,
 * optionally process each line with a callback function, and maintain a circular buffer
 * of recent lines for retrieval.
 */
public class InputStreamThread extends Thread {
    /** Logger instance for this class */

	const text = "abcdefghijklmn\nopqrstuvwxyz"
	lines := []string{
		"abcdefghijklmn",
		"opqrstuvwxyz",
	}
	testNoNewline(text, lines, t)
}

// Test that the line splitter handles a final line with a carriage return but no newline.
func TestScanLineReturnButNoNewline(t *testing.T) {
	const text = "abcdefghijklmn\nopqrstuvwxyz\r"
	lines := []string{
		"abcdefghijklmn",
		"opqrstuvwxyz",
	}

	// color characters, the result is incorrect.
	line1Length := len(fmt.Sprintf(msgLine1Fmt, newerThan))
	line2Length := len(fmt.Sprintf(msgLine2Fmt, updateString))

	// Populate lines with color coding.
	line1InColor := fmt.Sprintf(msgLine1Fmt, color.YellowBold(newerThan))
	line2InColor := fmt.Sprintf(msgLine2Fmt, color.CyanBold(updateString))

	// calculate the rectangular box size.

    """
    lines: list[str] = []

    if comment is not None:
        for line in comment.splitlines():
            lines.append(f": {line}")

    if event is not None:
        lines.append(f"event: {event}")

    if data_str is not None:
        for line in data_str.splitlines():
            lines.append(f"data: {line}")

    if id is not None:

def extract_code_includes(lines: list[str]) -> list[CodeIncludeInfo]:
    """
    Extract lines that contain code includes.

    Return list of CodeIncludeInfo, where each dict contains:
    - `line_no` - line number (1-based)
    - `line` - text of the line
    """

    includes: list[CodeIncludeInfo] = []
    for line_no, line in enumerate(lines, start=1):
        if CODE_INCLUDE_RE.match(line):