Add test case

Author: bunnie307

bmv/bsc2/build.gradle

@@ -1,4 +1,4 @@
-version = '0.6.1'
+version = '0.7.0'
 
 dependencies {
     compileOnly("foundation.icon:javaee-api:$javaeeVersion")

bmv/bsc2/src/main/java/foundation/icon/btp/bmv/bsc2/BTPMessageVerifier.java

@@ -84,7 +84,7 @@ public BTPMessageVerifier(Address _bmc, BigInteger _chainId, @Optional byte[] _h
 
     @External(readonly = true)
     public String getVersion() {
-        return "0.5.0";
+        return "0.7.0";
     }
 
     @External(readonly = true)

bmv/bsc2/src/main/java/foundation/icon/btp/bmv/bsc2/Snapshot.java

@@ -191,6 +191,9 @@ public String toString() {
                 ", candidates=" + candidates +
                 ", voters=" + voters +
                 ", recents=" + recents +
+                ", attestation=" + attestation +
+                ", currTurnLength=" + currTurnLength +
+                ", nextTurnLength=" + nextTurnLength +
                 '}';
     }
 

bmv/bsc2/src/main/java/foundation/icon/btp/bmv/bsc2/Validator.java

@@ -34,4 +34,11 @@ public EthAddress getAddress() {
     public BLSPublicKey getPublicKey() {
         return pubkey;
     }
+
+    @Override
+    public String toString() {
+        return "Validator{" +
+                "address=" + address +
+                '}';
+    }
 }

bmv/bsc2/src/main/java/foundation/icon/btp/bmv/bsc2/Validators.java

@@ -81,4 +81,12 @@ public boolean contains(BLSPublicKey pubkey) {
     public int size() {
         return validators.size();
     }
+
+    @Override
+    public String toString() {
+        return "Validators{" +
+                "validators=" + validators+
+                '}';
+    }
+
 }