/**
 * Generates the String representation of a diff between `actual` and `expected` values.
 */
interface DiffWriter {
    /**
     * Adds text that is equal in `expected` and `actual`.
     *
     * @param text - the text to keep in `actual`
     * @throws RangeError if the writer was already flushed
     */
    writeEqual(text: string): void;
    /**
     * Deletes text that is present in `actual` but not `expected`.
     *
     * @param text - the text that needs to be deleted from `actual`
     * @throws RangeError if the writer was already flushed
     */
    writeDeleted(text: string): void;
    /**
     * Adds text that is present in `expected` but not `actual`.
     *
     * @param text - the text that needs to be inserted into `actual`
     * @throws RangeError if the writer was already flushed
     */
    writeInserted(text: string): void;
    /**
     * @returns the lines of the actual value
     * @throws RangeError if the writer was already flushed
     */
    getActualLines(): string[];
    /**
     * @returns the lines to display after "actual" and before "expected" (empty lines should not be displayed)
     * @throws RangeError if the writer was already flushed
     */
    getDiffLines(): string[];
    /**
     * @returns the lines of the expected value
     * @throws RangeError if the writer was already flushed
     */
    getExpectedLines(): string[];
    /**
     * @returns an array that indicates whether the actual and expected values are equal on each line
     * @throws RangeError if the writer was already flushed
     */
    getEqualLines(): boolean[];
    /**
     * @returns a padding character used to align values vertically
     */
    getPaddingMarker(): string;
    /**
     * Flushes the writer's output.
     */
    flush(): void;
}
export type { DiffWriter };