@Test
    public void testFromJsonAboutJsonElement() {
        TestObject testObject = generateTestObject();

        JsonObject jsonObject = JsonParser.parseString(EXPECTED_JSON).getAsJsonObject();
        TestObject parseObject = GsonUtils.getInstance().fromJson(jsonObject, TestObject.class);

        assertEquals(testObject, parseObject);
    }
test method about {@link GsonUtils#fromJson(JsonElement, Class)}.
shenyu-common/src/test/java/org/apache/shenyu/common/utils/GsonUtilsTest.java