import org.junit.Assert;

/**
 * Various utilities for testing {@link HashFunction}s.
 *
 * @author Dimitris Andreou
 * @author Kurt Alfred Kluever
 */
@NullUnmarked
final class HashTestUtils {
  private HashTestUtils() {}

  /** Converts a string, which should contain only ascii-representable characters, to a byte[]. */
  static byte[] ascii(String string) {
    byte[] bytes = new byte[string.length()];

  public void testBasic() {
    for (double fpr = 0.0000001; fpr < 0.1; fpr *= 10) {
      for (int expectedInsertions = 1; expectedInsertions <= 10000; expectedInsertions *= 10) {
        checkSanity(BloomFilter.create(HashTestUtils.BAD_FUNNEL, expectedInsertions, fpr));
      }
    }
  }

  public void testPreconditions() {
    assertThrows(
        IllegalArgumentException.class,

  public void testBasic() {
    for (double fpr = 0.0000001; fpr < 0.1; fpr *= 10) {
      for (int expectedInsertions = 1; expectedInsertions <= 10000; expectedInsertions *= 10) {
        checkSanity(BloomFilter.create(HashTestUtils.BAD_FUNNEL, expectedInsertions, fpr));
      }
    }
  }

  public void testPreconditions() {
    assertThrows(
        IllegalArgumentException.class,