api23Fingerprints.java

  @Test
  @Config(sdk = Build.VERSION_CODES.M)
  public void testFingerprintConfigured_api23() throws Exception {
    // GIVEN:
    //   API23 android version
    //   Fingerprints are configured
    //   fingerprint feature is ignored by android os
    ReactApplicationContext context = getRNContext();

    // set that hardware is available
    FingerprintManager fm = (FingerprintManager) context.getSystemService(Context.FINGERPRINT_SERVICE);
    shadowOf(fm).setIsHardwareDetected(true);
    shadowOf(fm).setDefaultFingerprints(5); // 5 fingerprints are available

    // WHEN: check availability
    final int result = BiometricManager.from(context).canAuthenticate();
    final KeychainModule module = new KeychainModule(context);
    final boolean isFingerprintWorking = module.isFingerprintAuthAvailable();

    // THEN: biometric works
    assertThat(result, is(BiometricManager.BIOMETRIC_SUCCESS));
    assertThat(isFingerprintWorking, is(true));
  }