Eclipse 下 Junit 4 简单的测试类运行不起来

Calculate.java 代码 package com.ab.util; public class Calculate { public int add(int a， int b){ return a+b; } public int substract(int a， int b){ return a-b; } public int multiply(int a ，int b){ return a*b; } public ... Calculate.java 代码 package com.ab.util; public class Calculate { public int add(int a， int b){ return a+b; } public int substract(int a， int b){ return a-b; } public int multiply(int a ，int b){ return a*b; } public int divide( int a， int b){ return a/b; } } CalculateTest.java 测试代码 package com.ab.util; import static org.junit.Assert.*; import org.junit.Test; public class CalculateTest { @Test public void test() { fail("Not yet implemented"); } @Test public void add(){ assertEquals(6， new Calculate().add(3， 3)); } }