add commitRoot test

Signed-off-by: Neo <neotheprogramist@proton.me>

ipa-multipoint/src/test/java/org/hyperledger/besu/nativelib/ipa_multipoint/CommitRootTest.java

@@ -0,0 +1,46 @@
+package org.hyperledger.besu.nativelib.ipa_multipoint;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import static org.assertj.core.api.Assertions.*;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.apache.tuweni.bytes.Bytes;
+import org.apache.tuweni.bytes.Bytes32;
+import org.hyperledger.besu.nativelib.ipamultipoint.LibIpaMultipoint;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+public class CommitRootTest {
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
+    public static List<TestData> JsonData() throws IOException {
+        InputStream inputStream = PedersenCommitmentTest.class.getResourceAsStream("/genesis_lvl1_commits.json");
+        return objectMapper.readValue(inputStream, new TypeReference<List<TestData>>() {
+        });
+    }
+
+    static class TestData {
+        public ArrayList<String> frs;
+        public String expected;
+    }
+
+    @ParameterizedTest
+    @MethodSource("JsonData")
+    public void TestPolynomialCommitments(TestData testData) {
+        List<Bytes> FrBytes = new ArrayList<>();
+        for (int i = 0; i < 256; i++) {
+            Bytes32 value = Bytes32.fromHexString(testData.frs.get(i));
+            FrBytes.add(value);
+        }
+        byte[] input = Bytes.concatenate(FrBytes).toArray();
+        Bytes32 result = Bytes32.wrap(LibIpaMultipoint.commitRoot(input));
+        Bytes32 expected = Bytes32.fromHexString(testData.expected);
+        assertThat(result).isEqualTo(expected);
+    }
+}