test(jvm): add test that basic top-level credential can be created

Author: coriolinus

crypto-ffi/bindings/jvm/src/main/kotlin/com/wire/crypto/MlsModel.kt

@@ -32,3 +32,10 @@ fun ByteArray.toAvsSecret() = SecretKey(this)
 
 /** Construct a GroupInfo from bytes */
 fun ByteArray.toGroupInfo() = GroupInfo(this)
+
+/** Construct a new Credential from ciphersuite and client id */
+@Throws(CoreCryptoException::class)
+fun Credential.Companion.basic(
+    ciphersuite: Ciphersuite,
+    clientId: ClientId
+): Credential = credentialBasic(ciphersuite, clientId)

crypto-ffi/bindings/jvm/src/test/kotlin/com/wire/crypto/MLSTest.kt

@@ -475,4 +475,14 @@ class MLSTest : HasMockDeliveryService() {
             )
         }
     }
+
+    @Test
+    fun can_construct_basic_credential(): TestResult {
+        val scope = TestScope()
+        return scope.runTest {
+            val credential = Credential.basic(CIPHERSUITE_DEFAULT, genClientId())
+            assertEquals(credential.type(), CredentialType.BASIC)
+            assertEquals<ULong>(credential.earliestValidity(), 0u)
+        }
+    }
 }