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()];

    HashTestUtils.checkNoFunnels(Hashing.sha256());
    HashTestUtils.assertInvariants(Hashing.sha256());
    assertEquals("Hashing.sha256()", Hashing.sha256().toString());
  }

  public void testSha384() {
    HashTestUtils.checkAvalanche(Hashing.sha384(), 100, 0.4);
    HashTestUtils.checkNo2BitCharacteristics(Hashing.sha384());
    HashTestUtils.checkNoFunnels(Hashing.sha384());

    HashTestUtils.checkNoFunnels(Hashing.sha256());
    HashTestUtils.assertInvariants(Hashing.sha256());
    assertEquals("Hashing.sha256()", Hashing.sha256().toString());
  }

  public void testSha384() {
    HashTestUtils.checkAvalanche(Hashing.sha384(), 100, 0.4);
    HashTestUtils.checkNo2BitCharacteristics(Hashing.sha384());
    HashTestUtils.checkNoFunnels(Hashing.sha384());

          }
        };
    // Murmur3F, MurmurHash3 for x64, 128-bit (MurmurHash3_x64_128)
    // From http://code.google.com/p/smhasher/source/browse/trunk/main.cpp
    HashTestUtils.verifyHashFunction(hf, 128, 0x6384BA69);
  }

  public void testInvariants() {
    HashTestUtils.assertInvariants(murmur3_128());
  }

          }
        };
    // Murmur3A, MurmurHash3 for x86, 32-bit (MurmurHash3_x86_32)
    // https://github.com/aappleby/smhasher/blob/master/src/main.cpp
    HashTestUtils.verifyHashFunction(hf, 32, 0xB0F57EE3);
  }

  public void testInvariants() {
    HashTestUtils.assertInvariants(murmur3_32());
  }

  @SuppressWarnings("deprecation")
  public void testInvalidUnicodeHashString() {
    String str =

  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,

package com.google.common.hash;

import static java.nio.charset.StandardCharsets.UTF_16LE;
import static org.junit.Assert.assertThrows;

import com.google.common.collect.Iterables;
import com.google.common.hash.HashTestUtils.RandomHasherAction;
import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

  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,

package com.google.common.hash;

import static java.nio.charset.StandardCharsets.UTF_16LE;
import static org.junit.Assert.assertThrows;

import com.google.common.collect.Iterables;
import com.google.common.hash.HashTestUtils.RandomHasherAction;
import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

        String algorithm = cell.getRowKey();
        SecretKey key = cell.getColumnKey();
        HashFunction hashFunc = cell.getValue();
        assertMacHashing(HashTestUtils.ascii(stringToTest), algorithm, key, hashFunc);
      }
    }
  }

  @AndroidIncompatible // sun.security
  public void testNoProviders() {
    ProviderList providers = Providers.getProviderList();