flink-connector-aws/flink-connector-dynamodb/src/test/java/org/apache/flink/connector/dynamodb/sink/DynamoDbBeanElementConverterTest.java

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 * 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
 *
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package org.apache.flink.connector.dynamodb.sink;

import org.apache.flink.connector.base.sink.writer.ElementConverter;
import org.apache.flink.connector.dynamodb.util.Order;

import org.junit.jupiter.api.Test;

import static org.apache.flink.connector.dynamodb.sink.DynamoDbWriteRequestType.PUT;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;

class DynamoDbBeanElementConverterTest {

    @Test
    void testBadType() {
        assertThatExceptionOfType(IllegalArgumentException.class)
                .isThrownBy(() -> new DynamoDbBeanElementConverter<>(Integer.class))
                .withMessageContaining(
                        "A DynamoDb bean class must be annotated with @DynamoDbBean");
    }

    @Test
    void testConvertOrderToDynamoDbWriteRequest() {
        ElementConverter<Order, DynamoDbWriteRequest> elementConverter =
                new DynamoDbBeanElementConverter<>(Order.class);
        elementConverter.open(null);
        Order order = new Order("orderId", 1, 2.0);

        DynamoDbWriteRequest actual = elementConverter.apply(order, null);

        assertThat(actual.getType()).isEqualTo(PUT);
        assertThat(actual.getItem()).containsOnlyKeys("orderId", "quantity", "total");
        assertThat(actual.getItem().get("orderId").s()).isEqualTo("orderId");
        assertThat(actual.getItem().get("quantity").n()).isEqualTo("1");
        assertThat(actual.getItem().get("total").n()).isEqualTo("2.0");
    }

    @Test
    void testConvertOrderToDynamoDbWriteRequestWithIgnoresNull() {
        ElementConverter<Order, DynamoDbWriteRequest> elementConverter =
                new DynamoDbBeanElementConverter<>(Order.class, true);
        elementConverter.open(null);
        Order order = new Order(null, 1, 2.0);

        DynamoDbWriteRequest actual = elementConverter.apply(order, null);

        assertThat(actual.getItem()).containsOnlyKeys("quantity", "total");
    }

    @Test
    void testConvertOrderToDynamoDbWriteRequestWritesNull() {
        ElementConverter<Order, DynamoDbWriteRequest> elementConverter =
                new DynamoDbBeanElementConverter<>(Order.class, false);
        elementConverter.open(null);
        Order order = new Order(null, 1, 2.0);

        DynamoDbWriteRequest actual = elementConverter.apply(order, null);

        assertThat(actual.getItem()).containsOnlyKeys("orderId", "quantity", "total");
        assertThat(actual.getItem().get("orderId").nul()).isTrue();
    }

    @Test
    void testConvertWithClosedConvertedThrowsException() {
        ElementConverter<Order, DynamoDbWriteRequest> elementConverter =
                new DynamoDbBeanElementConverter<>(Order.class);
        Order order = new Order(null, 1, 2.0);

        assertThatExceptionOfType(NullPointerException.class)
                .isThrownBy(() -> elementConverter.apply(order, null))
                .withMessageContaining("Table schema has not been initialized");
    }
}