create MtlsClientFactoryTest

src/test/java/com/aruba/simpl/usersroles/configurations/MtlsClientFactoryTest.java

+package com.aruba.simpl.usersroles.configurations;
+
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.*;
+
+import com.aruba.simpl.client.SimplClient.Builder;
+import com.aruba.simpl.client.adapters.EphemeralProofAdapter;
+import com.aruba.simpl.client.feign.FeignSimplClient;
+import com.aruba.simpl.common.interceptors.TierOneTokenPropagatorInterceptor;
+import java.security.KeyStore;
+import java.security.cert.Certificate;
+import java.util.Collections;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@Import({MtlsClientFactory.class})
+@MockBean(
+        classes = {
+            TierOneTokenPropagatorInterceptor.class,
+            MtlsClientProperties.class,
+            EphemeralProofAdapter.class,
+        })
+public class MtlsClientFactoryTest {
+
+    @Autowired
+    MtlsClientFactory mtlsClientFactory;
+
+    @MockBean
+    private FeignSimplClient simplClient;
+
+    @Test
+    void buildAuthorityClient_success() throws Exception {
+        var url = "url";
+        var keyStore = mock(KeyStore.class);
+        var password = "pwd";
+
+        Certificate certificate = mock(Certificate.class);
+        Certificate[] certs = {certificate};
+        var simplClientBuilder = mock(Builder.class);
+        var feignBuilder = mock(feign.Feign.Builder.class);
+
+        given(keyStore.aliases()).willReturn(Collections.enumeration(List.of("keystore_alias")));
+        given(keyStore.getCertificateChain("keystore_alias")).willReturn(certs);
+        given(simplClient.builder(any())).willReturn(simplClientBuilder);
+        given(simplClientBuilder.setAuthorizationHeaderSupplier(any())).willReturn(simplClientBuilder);
+        given(simplClientBuilder.setEphemeralProofAdapter(any())).willReturn(simplClientBuilder);
+        given(simplClientBuilder.setAuthorityUrlSupplier(any())).willReturn(simplClientBuilder);
+        given(simplClientBuilder.build()).willReturn(feignBuilder);
+
+        try (MockedStatic<KeyStore> ks = Mockito.mockStatic(KeyStore.class)) {
+            ks.when(() -> KeyStore.getInstance("PKCS12")).thenReturn(keyStore);
+            mtlsClientFactory.buildAuthorityClient(url, keyStore, password);
+        }
+    }
+}