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Testing JSON Utility Implementation in xxl-job

This test suite validates the JacksonUtil class functionality in xxl-job, focusing on JSON serialization and deserialization operations. The tests ensure proper handling of map-to-JSON conversion and JSON-to-map parsing capabilities.

Test Coverage Overview

The test suite provides comprehensive coverage of JacksonUtil’s core JSON handling capabilities.

Map to JSON string conversion validation
JSON string to Map object deserialization testing
Verification of key-value pair integrity during conversions
String format validation for JSON output

Implementation Analysis

The implementation follows a clear Given-When-Then pattern using JUnit Jupiter framework. Each test case isolates specific JSON conversion functionality, utilizing HashMap for data structure testing and explicit assertions for validation.

Structured test methods with clear arrange-act-assert sections
Direct method testing through static imports
Precise assertion checks for expected JSON formatting

Technical Details

JUnit Jupiter test framework implementation
Jackson library integration for JSON processing
HashMap usage for test data structure
Static assertion methods for validation
Direct method access through static imports

Best Practices Demonstrated

The test suite exemplifies clean testing practices with well-structured test methods and clear separation of concerns.

Descriptive test method names using ‘should’ prefix
Consistent test structure with Given-When-Then pattern
Focused test cases with single responsibility
Clear test data setup and expectations

xuxueli/xxl-job

xxl-job-admin/src/test/java/com/xxl/job/admin/core/util/JacksonUtilTest.java

            
package com.xxl.job.admin.core.util;

import org.junit.jupiter.api.Test;

import java.util.HashMap;
import java.util.Map;

import static com.xxl.job.admin.core.util.JacksonUtil.writeValueAsString;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class JacksonUtilTest {

    @Test
    public void shouldWriteValueAsString() {
        //given
        Map<String, String> map = new HashMap<>();
        map.put("aaa", "111");
        map.put("bbb", "222");

        //when
        String json = writeValueAsString(map);

        //then
        assertEquals(json, "{\"aaa\":\"111\",\"bbb\":\"222\"}");
    }

    @Test
    public void shouldReadValueAsObject() {
        //given
        String jsonString = "{\"aaa\":\"111\",\"bbb\":\"222\"}";

        //when
        Map result = JacksonUtil.readValue(jsonString, Map.class);

        //then
        assertEquals(result.get("aaa"), "111");
        assertEquals(result.get("bbb"),"222");

    }
}