### Question:
RequestSigningService { public Digest buildDigest(String requestBody) { return Digest.builder() .requestBody(requestBody) .build(); } RequestSigningService(Pkcs12KeyStore keyStore); Digest buildDigest(String requestBody); Signature buildSignature(Map<String, String> headersMap); TppSignatureCertificate buildTppSignatureCertificate();  }### Answer:
@Test void buildDigest() { Digest actual = service.buildDigest("body"); assertNotNull(actual); assertEquals("Digest", actual.getHeaderName()); assertEquals("SHA-256=Iw2DWNyOiJC0xY3utikS7i8gNXrpKlzIYbmOaP4xrLU=", actual.getHeaderValue()); }