Mocking breaks Java 8 streams framework.

[johanhaleby]

From BinisBe...@gmail.com on September 03, 2014 10:31:56

What steps will reproduce the problem? 1. Unzip the eclipse project attached to the issue
2 . Run the unit test. What is the expected output? What do you see instead? Expected the test to pass but it fails with org.powermock.reflect.exceptions.MethodNotFoundException: No methods matching the name(s) stream were found in the class hierarchy of class java.util.ArrayList. What version of the product are you using? On what operating system? Powermock 1.5.5 on Windows 8.1 with Java 8

Attachment: mockTest.zip

Original issue: http://code.google.com/p/powermock/issues/detail?id=516

[johanhaleby]

From BinisBe...@gmail.com on September 19, 2014 01:02:46

Its fixed with 1.5.6

[Am1rr3zA]

Have the same issue with List, When I am trying to mock below code it gave me the exception. if I change it to ArrayList it works.

    @Mock
    private List<Map<String, Object>> records;

I am using :

    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-all</artifactId>
        <version>1.10.19</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-core</artifactId>
        <version>1.6.6</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <version>1.6.6</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-api-mockito</artifactId>
        <version>1.6.6</version>
        <scope>test</scope>

P.S.: Something weird about it is that when I Mock List in debugger mode I can see the size but when I want to run that line I get the expiation.

if (rawRecords.size() > topicConfig.getInt("maximum.batch.size")) {
....
}

In debugger I can see the rawRecords.size() is 2 and topicConfig.getInt("maximum.batch.size") is one and also the expression rawRecords.size() > topicConfig.getInt("maximum.batch.size") is true but when I want to step over this line I get the exception.

@RunWith(PowerMockRunner.class)
@PrepareForTest({KafkaService.class, ConfigFactory.class, Config.class})
public class KafkaServiceTest {

@Test
    public void recordSizeGreaterThanAllowedBatchSize() throws Exception {

        PowerMockito.doReturn(2).when(records, "size");

        when(topicConfig.getInt("maximum.batch.size")).thenReturn(1);
        ......
}
}