The technical principle of the "JSON Unit" framework in the Java class library

JSON Unit is a framework for testing JSON data in the Java library.It is widely used in test -driven development (TDD) and behavioral drive development (BDD). By providing a series of simple and easy -to -use assertions, JSON data can be checked and verified. The technical principle of JSON Unit is a comparison of the structure and content based on JSON data.It can convert JSON data to the JSONObject object in Java, and then assertive verification by comparing two JSONObject. JSON Unit provides many methods for asserting verification, which can check whether the structure and content of the JSON data meet the expectations.Here are some commonly used examples: 1. Use the `Assertequals () method to compare whether the two JSON data are exactly the same: String expectedJson = "{\"name\": \"John\", \"age\": 25}"; String actualJson = "{\"name\": \"John\", \"age\": 25}"; JSONAssert.assertEquals(expectedJson, actualJson, true); 2. Use the method to compare whether the two json data are equal to the two JSON data, but the difference in order differences: String expectedJson = "[{\"name\": \"John\", \"age\": 25}, {\"name\": \"Alice\", \"age\": 30}]"; String actualJson = "[{\"age\": 30, \"name\": \"Alice\"}, {\"name\": \"John\", \"age\": 25}]"; JsonAssert.assertJsonEquals(expectedJson, actualJson, JSONCompareMode.LENIENT); 3. Use the `Assertnotequals () method to compare whether the two JSON data are not equal: String expectedJson = "{\"name\": \"John\", \"age\": 25}"; String actualJson = "{\"name\": \"Jane\", \"age\": 30}"; JSONAssert.assertNotEquals(expectedJson, actualJson, true); In addition to the methods in the above examples, JSON Unit also provides some other methods to compare part of the structure and content of JSON data, such as: -` Assertjsonpartequals () `: whether the specific part of the JSON data is equal; -` AssertjsonNodepRed () `: Verify whether there is a node in the JSON data; -` Assertjsonequalsignoreorder () `: Compare whether the two JSON arrays are equal, but ignore the difference in element order. By using JSON Unit, developers can easily test and verify JSON data to ensure that they meet their expectations.At the same time, JSON Unit also provides more advanced features, such as comparison of support for XML and HTML data, and more complicated JSON structure verification.This makes JSON Unit a very useful test tool to help developers write high -quality and reliable JSON data test code.