@Test
  public void testNoRecords() {
    assertThat(accountDb.getAccounts()).isEmpty();
    assertThat(accountDb.indexExists(index("johndoe@gmail.com", null))).isFalse();
    assertThat(accountDb.getSecret(index("johndoe@gmail.com", null))).isNull();
    assertThat(accountDb.findSimilarExistingIndex(index("johndoe@gmail.com", null))).isNull();
    assertThat(accountDb.indexExists(index("johndoe@gmail.com", GOOGLE_ISSUER))).isFalse();
    assertThat(accountDb.getSecret(index("johndoe@gmail.com", GOOGLE_ISSUER))).isNull();
    assertThat(accountDb.findSimilarExistingIndex(index("johndoe@gmail.com", GOOGLE_ISSUER))).isNull();
  }
A list of {@link TestAccount}s that all have issuers.
javatests/com/google/android/apps/authenticator/otp/AccountDbTest.java