fix test

Author: hhio618

app/src/test/java/ai/elimu/crowdsource/ExampleUnitTest.java

@@ -3,6 +3,9 @@
 import static org.junit.Assert.assertEquals;
 
 import org.junit.Test;
+import org.web3j.utils.Numeric;
+
+import java.nio.charset.StandardCharsets;
 
 import ai.elimu.crowdsource.ui.authentication.SignInWithWeb3Activity;
 import ai.elimu.crowdsource.util.EthersUtils;
@@ -18,7 +21,7 @@ public void web3recover_SanityCheck() {
         String signature = "382a3e04daf88f322730f6a2972475fc5646ea8c4a7f3b5e83a90b10ba08a7364cd2f55348f2b6d210fbed7fc485abf19ecb2f3967e410d6349dd7dd1d4487751b";
         String message = "0x63f9a92d8d61b48a9fff8d58080425a3012d05c8igwyk4r1o7o";
         String digest = "0x438d6abe3d60b1a1f3f1e0c606ba249bc30e221001b9269f96be450c393c2f7c";
-        assertEquals(EthersUtils.hashMessage(message), digest);
+        assertEquals(Numeric.toHexString(EthersUtils.hashMessage(message)), digest);
         assertEquals(EthersUtils.recoverAddress(EthersUtils.hashMessage(message), signature), "0x63f9a92d8d61b48a9fff8d58080425a3012d05c8");
     }
 }