@Test
    public void testSplitUnclosedEscaping() {
        Map<String, String> kvMap = splitKv("f1=a&f2=b\\", '&', '=',
                '\\', '\"');
        Assert.assertEquals("b", kvMap.get("f2"));
    }
Unit tests for kv splitting and concating.
inlong-sort/sort-formats/format-rowdata/format-rowdata-kv/src/test/java/org/apache/inlong/sort/formats/kv/KvUtilsTest.java