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Testing Integer Object Equality Comparisons in litemall

This test suite examines Integer object behavior and equality comparisons in Java. It specifically tests different scenarios of Integer object creation and comparison using both primitive int and Integer wrapper objects, focusing on reference equality versus value equality.

Test Coverage Overview

The test coverage focuses on Integer object comparison scenarios in Java.

Key areas tested include:

Primitive int vs Integer object comparison using == operator
Integer object equality using equals() method
Integer object reference comparison using == operator
Value equality between different Integer instances

Implementation Analysis

The testing approach employs JUnit to validate Integer object behavior and equality comparisons. The test creates multiple Integer objects with the same value (512) using different instantiation methods, then compares them using both == operator and equals() method to demonstrate Java’s object reference vs value equality concepts.

Technical Details

Testing tools and configuration:

JUnit 4 testing framework
Java Integer wrapper class
Primitive int type
Object comparison operators (== and equals())
System.out.println for result output

Best Practices Demonstrated

The test demonstrates fundamental Java concepts and testing practices:

Clear test method organization
Explicit object instantiation testing
Comparison operator behavior verification
Object equality testing patterns
Wrapper class behavior examination

linlinjava/litemall

litemall-core/src/test/java/org/linlinjava/litemall/core/IntegerTest.java

            
package org.linlinjava.litemall.core;

import org.junit.Test;

public class IntegerTest {
    @Test
    public void test() {
        Integer a = new Integer(512);
        int b = 512;
        Integer c = new Integer(512);
        System.out.println(a==b);
        System.out.println(a.equals(b));
        System.out.println(a == c);
        System.out.println(a.equals(c));
    }
}