@Before
    public void init() {
        source = Preconditions.checkNotNull(getSource(), "Source is null");
        expectedValues = Preconditions.checkNotNull(getExpectedValues(), "Expected values is null");
        dynamicSchemaFormat = Preconditions.checkNotNull(getDynamicSchemaFormat(), "Dynamic schema format is null");
    }
Dynamic schema format base test

@param <T>
inlong-sort/sort-flink/base/src/test/java/org/apache/inlong/sort/base/format/DynamicSchemaFormatBaseTest.java