如何測試 Java Private Method / Property

package com.puritys;
 
public class Food {
 
    private String getLink(final int type) {
        switch(type) {
            case 1:
                return "http://xxx.xx.xx/xxx.html";
            case 2:
                return "/xxx.html";
        }
        return "none";
    }
}

package com.puritys;                                                                           
 
import static org.junit.Assert.assertEquals;
import java.lang.reflect.Method;
import org.junit.*;
import com.puritys.Food;
 
public class FoodTest {
    private Food tester;
 
    @Before
    public void setUp() throws Exception {
        this.tester = new Food();
    }
 
 
    @Test
    public void testApp() throws Exception {
        Method method = this.tester.getClass().getDeclaredMethod("getLink", int.class);
        method.setAccessible(true);
        Object[] parameters = new Object[1];
        parameters[0] = 1;
        String ret = (String) method.invoke(this.tester, parameters);
        assertEquals("The url should be http://", "http://xxx.xx.xx/xxx.html", ret);
 
        parameters[0] = 2;
        ret = (String) method.invoke(this.tester, parameters);
        assertEquals("The url should be xx", "/xxx.html", ret);
 
    }
}

public class Food {
    private String name = "Apple";
 
    public String getName() {
        return this.name;
    }   
 
}

package com.puritys;                                                                           
 
import static org.junit.Assert.assertEquals;
import java.lang.reflect.Field;
import org.junit.*;
import com.puritys.Food;
 
public class FoodTest {
    @Test
    public void testGetName() { 
        String name = "";                                                                      
        try { 
            Field f = this.tester.getClass().getDeclaredField("name");
            f.setAccessible(true);
            name = (String) f.get(this.tester);
        } catch (Exception e) { 
            System.out.println("has exception, error msg = " + e.getMessage());
        } 
        assertEquals("The name should be Apple", name, "Apple");
    }
}