Question

我在我的Android应用中使用Mockito和PowerMock进行本地单元测试：

testImplementation 'org.mockito:mockito-core:2.8.9'

String powerMockVersion = "1.7.3"
testImplementation "org.powermock:powermock-module-junit4:${powerMockVersion}"
testImplementation "org.powermock:powermock-api-mockito2:${powerMockVersion}"

这是我的代码：

MyTextUtils.java

package sample.com.sample_app;

import android.support.annotation.Nullable;
import android.text.TextUtils;

public class MyTextUtils {

    private MyTextUtils() {
        throw new AssertionError();
    }

    public static boolean isEmpty(@Nullable final CharSequence cs) {
        return TextUtils.isEmpty(cs);
    }
}

SystemUtils.java

package sample.com.sample_app;

import java.util.Random;

public class SystemUtils {

    private SystemUtils() {
        throw new AssertionError();
    }

    public static long currentTimeMillis() {
        return System.currentTimeMillis();
    }

    public static long nextLong() {
        return new Random().nextLong();
    }
}

我的测试。

FooTest.java

package sample.com.sample_app;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import static org.junit.Assert.assertEquals;

@RunWith(PowerMockRunner.class)
@PrepareForTest(SystemUtils.class)
public class FooTest {

    @Before
    public void setUp() {
        PowerMockito.spy(SystemUtils.class);
        PowerMockito.when(SystemUtils.currentTimeMillis()).thenReturn(1_000L);
    }

    @Test
    public void foo() {
        assertEquals(1_000L, SystemUtils.currentTimeMillis());
    }
}

LoremIpsumTest.java

package sample.com.sample_app;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import static org.junit.Assert.assertTrue;

@RunWith(PowerMockRunner.class)
@PrepareForTest(MyTextUtils.class)
public class LoremIpsumTest {

    @Before
    public void setUp() {
        PowerMockito.spy(MyTextUtils.class);
        PowerMockito.when(MyTextUtils.isEmpty("")).thenReturn(true);
    }

    @Test
    public void lorem() {
        assertTrue(MyTextUtils.isEmpty(""));
    }
}

当我运行LoremIpsumTest时，它失败并出现以下错误：

java.lang.RuntimeException: Method isEmpty in android.text.TextUtils not mocked. See http://g.co/androidstudio/not-mocked for details.

如果我将PowerMockito.spy(MyTextUtils.class);替换为PowerMockito.mockStatic(MyTextUtils.class);，则LoremIpsumTest可以使用。

另一方面，FooTest适用于PowerMockito.spy(SystemUtils.class);。 LoremIpsumTest中的部分嘲弄事情有什么问题？

Answer 1

http://tools.android.com/tech-docs/unit-testing-support#TOC-Method-...-not-mocked.-

“我们知道，在使用Log或TextUtils等类时，默认行为会出现问题，并会在将来的版本中评估可能的解决方案。”

https://medium.com/@okmanideep/dont-create-that-stringutils-to-unit-test-your-android-class-8ab32af34e84

错误＆＃34;方法isEmpty在android.text.TextUtils中没有被模拟＆＃34;使用PowerMockito.spy时

1 个答案: