@Test
    public void testMissingUsernamePasswordAuthenticator() {
        val basicAuthClient = new DirectBasicAuthClient(null);
        TestsHelper.expectException(() -> basicAuthClient.getCredentials(new CallContext(MockWebContext.create(), new MockSessionStore())),
                TechnicalException.class, "authenticator cannot be null");
    }
This class tests the {@link DirectBasicAuthClient} class.

@author Jerome Leleu
@since 1.8.0
pac4j-http/src/test/java/org/pac4j/http/client/direct/DirectBasicAuthClientTests.java