@Test
    public void testReplaceholder() {
        String before = "today is ${date}, today weather is ${weather}";
        Map<String, Object> maps = new HashMap<>();
        maps.put("date", "2022.08.05");
        maps.put("weather", "rain");
        String after = PlaceholderResolver.getDefaultResolver().resolveByMap(before, maps);
        assertEquals(after, "today is 2022.08.05, today weather is rain");
    }
Retrieves the value of this property, or the given default if no value was set.

@return the value of this property, or the given default if no value was set
inlong-sort/sort-end-to-end-tests/sort-end-to-end-tests-v1.13/src/test/java/org/apache/inlong/sort/tests/utils/TestUtils.java