当父级在不同的包中时模拟受保护的父级方法
Mock Protected Parent Method When the Parent is in a Different Package
我需要在测试中的 class 的父 class 中模拟一个受保护的方法,但是父 class 在不同的包中,所以我的测试 class无法访问该方法,所以我无法模拟它。必须有一个无需重构的解决方案
我需要使用 Powermock 和 Mockito。这是 JAR
- mockito-all 1.10.8
- powermock-核心 1.6.1
- powermock-module-junit4 1.6.1
- powermock-api-mockito 1.6.1
- junit 4.12
这是遗留代码,所以我无法重构,但这是简化的代码。
Parent.java
package parent;
public class Parent {
// Want to mock this protected parent method from different package
protected String foo() {
String someValue = null;
// Logic setting someValue
return someValue;
}
}
Child.java
package child;
import parent.Parent;
public class Child extends Parent {
String fooString = null;
public String boo() {
this.fooString = this.foo();
String booString = null;
// Logic setting booString
return booString;
}
}
ChildTest.java
package child;
import static org.mockito.Mockito.spy;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import parent.Parent;
@RunWith(PowerMockRunner.class)
@PrepareForTest({ Parent.class, Child.class })
public class ChildTest {
// Class Under Test
Child cut;
@Before
public void setUp() throws Exception {
// Partial mock to mock methods in parent class
cut = spy(new Child());
}
@Test
public void testBoo() {
// TODO: Need to mock cut.foo() but can't figure out how.
// Following gives me this error: The method foo() from the type Parent is not visible
Mockito.when(((Parent)cut).foo()).thenReturn("mockValue");
// Test
cut.boo();
// Validations
Assert.assertEquals(cut.fooString, "mockValue");
}
}
只需创建一个新的 class 用于测试扩展您想要测试的 class,并在那里覆盖您的方法。
看起来像这样:
public class ChildForTest extends Child{
@Override
protected String foo() {
//mock logic here
}
}
编辑:
如果你想避免新的 class 定义,你可以使用匿名 class
@Before
public void setUp() throws Exception {
// Partial mock to mock methods in parent class
cut = new Child(){
@Override
protected String foo(){
//mock logic here
return "";
}
};
}
您可以使用 PowerMock 来模拟没有 public 方法。
@RunWith(PowerMockRunner.class)
public class ChildTest {
@Test
public void testBoo() throws Exception {
//given
Child child = PowerMockito.spy(new Child());
PowerMockito.when(child, "foo").thenReturn("mockValue");
//when
String boo = child.boo();
//then
Assert.assertEquals("boo+mockValue", boo);
}
}
我需要在测试中的 class 的父 class 中模拟一个受保护的方法,但是父 class 在不同的包中,所以我的测试 class无法访问该方法,所以我无法模拟它。必须有一个无需重构的解决方案
我需要使用 Powermock 和 Mockito。这是 JAR
- mockito-all 1.10.8
- powermock-核心 1.6.1
- powermock-module-junit4 1.6.1
- powermock-api-mockito 1.6.1
- junit 4.12
这是遗留代码,所以我无法重构,但这是简化的代码。
Parent.java
package parent;
public class Parent {
// Want to mock this protected parent method from different package
protected String foo() {
String someValue = null;
// Logic setting someValue
return someValue;
}
}
Child.java
package child;
import parent.Parent;
public class Child extends Parent {
String fooString = null;
public String boo() {
this.fooString = this.foo();
String booString = null;
// Logic setting booString
return booString;
}
}
ChildTest.java
package child;
import static org.mockito.Mockito.spy;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import parent.Parent;
@RunWith(PowerMockRunner.class)
@PrepareForTest({ Parent.class, Child.class })
public class ChildTest {
// Class Under Test
Child cut;
@Before
public void setUp() throws Exception {
// Partial mock to mock methods in parent class
cut = spy(new Child());
}
@Test
public void testBoo() {
// TODO: Need to mock cut.foo() but can't figure out how.
// Following gives me this error: The method foo() from the type Parent is not visible
Mockito.when(((Parent)cut).foo()).thenReturn("mockValue");
// Test
cut.boo();
// Validations
Assert.assertEquals(cut.fooString, "mockValue");
}
}
只需创建一个新的 class 用于测试扩展您想要测试的 class,并在那里覆盖您的方法。
看起来像这样:
public class ChildForTest extends Child{
@Override
protected String foo() {
//mock logic here
}
}
编辑: 如果你想避免新的 class 定义,你可以使用匿名 class
@Before
public void setUp() throws Exception {
// Partial mock to mock methods in parent class
cut = new Child(){
@Override
protected String foo(){
//mock logic here
return "";
}
};
}
您可以使用 PowerMock 来模拟没有 public 方法。
@RunWith(PowerMockRunner.class)
public class ChildTest {
@Test
public void testBoo() throws Exception {
//given
Child child = PowerMockito.spy(new Child());
PowerMockito.when(child, "foo").thenReturn("mockValue");
//when
String boo = child.boo();
//then
Assert.assertEquals("boo+mockValue", boo);
}
}