我正在尝试使用assertEquals传递进行简单测试 - 在我的情况下:assertEquals(bob,cell.getLifeForm());.
第一个测试assertTrue(成功);作品,意思是布尔成功= cell.addLifeForm(bob);的工作原理。
但我无法获得assertEquals(bob,cell.getLifeForm());通过。我相信我必须添加实例变量LifeForm myLifeForm;所以Cell类可以跟踪LifeForm,现在我需要在getLifeForm()中返回实例变量以及更新addLifeForm以正确修改实例变量(遇到这个问题)。谢谢。
TestCell.java:
import static org.junit.Assert.*;
import org.junit.Test;
/**
* The test cases for the Cell class
*
*/
public class TestCell
{
/**
* Checks to see if we change the LifeForm held by the Cell that
* getLifeForm properly responds to this change.
*/
@Test
public void testSetLifeForm()
{
LifeForm bob = new LifeForm("Bob", 40);
LifeForm fred = new LifeForm("Fred", 40);
Cell cell = new Cell();
// The cell is empty so this should work.
boolean success = cell.addLifeForm(bob);
assertTrue(success);
assertEquals(bob,cell.getLifeForm());
// The cell is not empty so this should fail.
success = cell.addLifeForm(fred);
assertFalse(success);
assertEquals(bob,cell.getLifeForm());
}
}
Cell.java:
/**
* A Cell that can hold a LifeForm.
*
*/
public class Cell
{
LifeForm myLifeForm;
//unsure about the instance variable
/**
* Tries to add the LifeForm to the Cell. Will not add if a
* LifeForm is already present.
* @return true if the LifeForm was added the Cell, false otherwise.
*/
public boolean addLifeForm(LifeForm entity)
{
return true;
//modify instance variable
}
/**
* @return the LifeForm in this Cell.
*/
public LifeForm getLifeForm()
{
return myLifeForm;
//return instance variable
}
}
答案 0 :(得分:2)
您有两条assertEquals(bob,cell.getLifeForm());
行。
在第一个中,如果您在this.myLifeForm = entity
方法中执行addLifeForm
,那么它将通过。在第二个方法中,如果您在if (this.myLifeForm == null) this.myLifeForm = entity
方法中执行addLifeForm
,那么它将通过。
在你的情况下,我会说测试工作正常,也就是说,它正在捕捉实现错误。