[Improve][Test][Connector-V2][MongoDB] Add few test cases for BsonToR…

…owDataConverters (#7579)

seatunnel-connectors-v2/connector-mongodb/src/test/java/org/apache/seatunnel/connectors/seatunnel/mongodb/serde/BsonToRowDataConvertersTest.java

@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.seatunnel.connectors.seatunnel.mongodb.serde;
+
+import org.apache.seatunnel.api.table.type.BasicType;
+
+import org.bson.BsonDouble;
+import org.bson.BsonInt32;
+import org.bson.BsonInt64;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class BsonToRowDataConvertersTest {
+    private final BsonToRowDataConverters converterFactory = new BsonToRowDataConverters();
+
+    @Test
+    public void testConvertAnyNumberToDouble() {
+        // It covered #6997
+        BsonToRowDataConverters.BsonToRowDataConverter converter =
+                converterFactory.createConverter(BasicType.DOUBLE_TYPE);
+
+        Assertions.assertEquals(1.0d, converter.convert(new BsonInt32(1)));
+        Assertions.assertEquals(1.0d, converter.convert(new BsonInt64(1L)));
+
+        Assertions.assertEquals(4.0d, converter.convert(new BsonDouble(4.0d)));
+        Assertions.assertEquals(4.4d, converter.convert(new BsonDouble(4.4d)));
+    }
+
+    @Test
+    public void testConvertBsonIntToBigInt() {
+        // It covered #7567
+        BsonToRowDataConverters.BsonToRowDataConverter converter =
+                converterFactory.createConverter(BasicType.LONG_TYPE);
+
+        Assertions.assertEquals(123456L, converter.convert(new BsonInt32(123456)));
+
+        Assertions.assertEquals(
+                (long) Integer.MAX_VALUE, converter.convert(new BsonInt64(Integer.MAX_VALUE)));
+    }
+}