Vscode-java-test: Test Runner can't find main class

Created on 24 Nov 2018 · 20Comments · Source: microsoft/vscode-java-test

Issue Type: Bug

I have a Spring boot project that I'm trying to test with this extension.
I'm using Java 8 and Junit.
It's a maven project.

The test runner claim it cannot find the main class.

[INFO] Listening for transport dt_socket at address: 38349
[ERROR] Error: Could not find or load main class com.microsoft.java.test.runner.Launcher
.
[INFO] Listening for transport dt_socket at address: 37621
[ERROR] Error: Could not find or load main class com.microsoft.java.test.runner.Launcher.
[ERROR] 
.
[INFO] Listening for transport dt_socket at address: 38995
[ERROR] Error: Could not find or load main class com.microsoft.java.test.runner.Launcher

here is my testing code

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
public class ElementRestControllerTest {

    @LocalServerPort
    private int port;

    private String url;

    private RestTemplate restTemplate;

    private ObjectMapper jsonMapper;

    @Rule
    public ExpectedException thrown = ExpectedException.none();

    private ElementTO dummyElement;
    private ElementTO dummy2;
    private ElementTO dummy3;


    @PostConstruct
    public void init() {
        this.restTemplate = new RestTemplate();
        this.url = "http://localhost:" + port;
        System.err.println(this.url);

        // Jackson init
        this.jsonMapper = new ObjectMapper();
    }

    @Before
    public void setup() {
        Map<String, Object> att = new HashMap<>();
        att.put("attribute1", new HashMap());
        this.dummyElement = new ElementTO("sheena", "123", new Location(13.0, 25.0), "Pen", new Date("20/11/18"),
                new Date("19/11/19"), "tool", att, "sheena", "[email protected]");

        this.dummy2 = new ElementTO("playground", "456", this.dummyElement.getLocation(), this.dummyElement.getName(),
                this.dummyElement.getCreationDate(), this.dummyElement.getExpirationDate(), this.dummyElement.getType(),
                this.dummyElement.getAttributes(), this.dummyElement.getCreatorPlayground(),
                this.dummyElement.getCreatorEmail());
        this.dummy3 = new ElementTO("playground", "789", new Location(4.0, 24.9), this.dummyElement.getName(),
                this.dummyElement.getCreationDate(), this.dummyElement.getExpirationDate(), this.dummyElement.getType(),
                this.dummyElement.getAttributes(), this.dummyElement.getCreatorPlayground(),
                this.dummyElement.getCreatorEmail());

    }

    @Test
    public void addNewElementSuccessfully() {

        String targetUrl = String.format("%s/playground/elements/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail());

        ElementTO actualElement = this.restTemplate.postForObject(targetUrl, this.dummyElement, ElementTO.class);
        assertThat(actualElement).isNotNull().isEqualTo(this.dummyElement);
    }

    @Test
    public void updateElementSuccessfully() {
        String postTargetUrl = String.format("%s/playground/elements/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail());

        // Given
        this.dummyElement.setLocation(new Location(26.0, 24.9));
        this.restTemplate.postForObject(postTargetUrl, this.dummyElement, ElementTO.class);

        // When
        ElementEntity elementEntity = this.dummyElement.toEntity();
        String putTargetUrl = String.format("%s/playground/elements/%s/%s/%s/%s", this.url,
                elementEntity.getCreatorPlayground(), elementEntity.getCreatorEmail(), elementEntity.getPlayground(),
                elementEntity.getId());

        this.restTemplate.put(putTargetUrl, this.dummyElement);

        // Then
        assertThat(elementEntity.getLocation()).isEqualTo(new Location(26.0, 24.9));
    }

    @Test
    public void getElementByItsIDSuccessfully() {
        String postTargetUrl = String.format("%s/playground/elements/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail());

        // Given
        this.restTemplate.postForObject(postTargetUrl, this.dummyElement, ElementTO.class);

        // When
        String getTargetUrl = String.format("%s/playground/elements/%s/%s/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail(),
                this.dummyElement.getPlayground(), this.dummyElement.getId());
        ElementTO actualElementTO = this.restTemplate.getForObject(getTargetUrl, ElementTO.class);

        // Then
        assertThat(actualElementTO).isEqualTo(this.dummyElement);
    }

    @Test
    public void getElementByItsIDWhenIDDoesNotExistShouldHttpServerErrorException() throws HttpServerErrorException {

        thrown.expect(HttpServerErrorException.class);
        thrown.expectMessage("500 null");

        // When
        String getTargetUrl = String.format("%s/playground/elements/%s/%s/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail(),
                this.dummyElement.getPlayground(), 1);
        this.restTemplate.getForObject(getTargetUrl, ElementTO.class);

    }

    @Test
    public void getAllElementsSuccesfully() {
        String postTargetUrl = String.format("%s/playground/elements/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail());

        // Given
        this.restTemplate.postForObject(postTargetUrl, this.dummyElement, ElementTO.class);
        this.restTemplate.postForObject(postTargetUrl, this.dummy2, ElementTO.class);

        // When
        String getAllUrl = String.format("%s/playground/elements/%s/%s/all", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail());
        ElementTO[] elements = this.restTemplate.getForObject(getAllUrl, ElementTO[].class);

        // Then
        ElementTO[] expected = { this.dummyElement, dummy2 };
        assertThat(elements).isNotNull().hasSize(2).isEqualTo(expected);

    }

    @Test
    public void getElementByCoordinatesShouldReturnMatch() {
        String postTargetUrl = String.format("%s/playground/elements/%s/%s", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail());

        // Given
        this.restTemplate.postForObject(postTargetUrl, this.dummyElement, ElementTO.class);
        this.restTemplate.postForObject(postTargetUrl, this.dummy3, ElementTO.class);

        // When
        ///playground/elements/{userPlayground}/{email}/near/{x}/{y}/{distance}
        String getAllUrl = String.format("%s/playground/elements/%s/%s/near/%d/%d/%d", this.url,
                this.dummyElement.getCreatorPlayground(), this.dummyElement.getCreatorEmail(), 10, 20, 5);
        assertThat(getAllUrl).isEqualTo(this.url + "/playground/elements/sheena/[email protected]/near/10/20/5");
        ElementTO[] elements = this.restTemplate.getForObject(getAllUrl, ElementTO[].class);

        assertThat(elements).containsOnly(this.dummyElement);

    }
}

Extension version: 0.11.0
VS Code version: Code 1.29.1 (bc24f98b5f70467bc689abf41cc5550ca637088e, 2018-11-15T19:07:43.495Z)
OS version: Linux x64 4.15.0-39-generic

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz (4 x 1728)|
|GPU Status|2d_canvas: enabled
checker_imaging: disabled_off
flash_3d: enabled
flash_stage3d: enabled
flash_stage3d_baseline: enabled
gpu_compositing: enabled
multiple_raster_threads: enabled_on
native_gpu_memory_buffers: disabled_software
rasterization: disabled_software
video_decode: unavailable_software
video_encode: unavailable_software
webgl: enabled
webgl2: enabled|
|Load (avg)|1, 1, 1|
|Memory (System)|7.70GB (1.33GB free)|
|Process Argv|--unity-launch|
|Screen Reader|no|
|VM|0%|

need more info

Source

amitlevy21

Most helpful comment

After more playing around I updated to openjdk 11 and the tests now run correctly.
Also I update my system which updated my version of java to 1.8.0_191 and the tests now work using that version as well.

zerosandones on 29 Nov 2018

👍2

All 20 comments

Seems you meet this issue when debugging the test code.

Is the functionality works correctly when just triggering Run Test?

jdneo on 25 Nov 2018

@jdneo thanks for the quick reply. It also happen when i try to use Run Test.
the only way i can run the tests if via the maven plugin which triggers the command mvnw test
Iv'e tried now running Run Test on a windows machine and it got stuck on running tests ( i will further check on this). Though i can see in the logs that it ran part of the tests

amitlevy21 on 25 Nov 2018

Hmm, looks wired. I haven't met this issue before.

Will it help if you do the following things?

Uninstall the extension in VS Code
Remove the extension files under: $HOME/.vscode/extensions/vscjava.vscode-java-test-*
Install the extension again

jdneo on 26 Nov 2018

same here. plugin version 0.11.1
code version 1.29.1-1542309157

Java 8, JUnit5, maven

ugurlu on 27 Nov 2018

Hmm, looks wired. I haven't met this issue before.

Will it help if you do the following things?

Uninstall the extension in VS Code

Remove the extension files under: $HOME/.vscode/extensions/vscjava.vscode-java-test-*

Install the extension again

On the Ubuntu machine, reinstalling the extension did not help. I also updated the extension to 0.11.1, same thing.

On the windows machine, I ran a simple test that tests a POJO class, the test runner ran the test and showed the results. But when i ran the spring test of the code attached below, the test runner hanged with the message Running tests, though i can see in the logs that the tests ran and completed and even passed. here are the logs

[INFO] @@<TestRunner-{"name":"testFinished", "attributes":{"name":"com.sheena.playground.api.ElementRestControllerTest#getElementByItsIDSuccessfully", "duration":"36"}}-TestRunner>
@@<TestRunner-{"name":"testSuiteFinished", "attributes":{"name":"com.sheena.playground.api.ElementRestControllerTest"}}-TestRunner>
@@<TestRunner-{"name":"testSummary", "attributes":{"message":"Total tests run: 7, Failures: 0, Skips: 0"}}-TestRunner>

amitlevy21 on 27 Nov 2018

@ugurlu @amitlevy21 Is it possible to share a sample project to me to repro the issue?

I tried but not able to repro it on my side

jdneo on 28 Nov 2018

@jdneo its a private repo, i can share a snapshot though.
Test-Runner-Application.zip

amitlevy21 on 28 Nov 2018

@ugurlu Is your environment also Linux?

jdneo on 28 Nov 2018

ubuntu 18.04

ugurlu on 28 Nov 2018

interesting note.
after commenting out spring-boot-maven-plugin, test works.

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
</plugin>

ugurlu on 28 Nov 2018

interesting note.
after commenting out spring-boot-maven-plugin, test works.

<plugin>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-maven-plugin</artifactId>
  <executions>
      <execution>
          <goals>
              <goal>repackage</goal>
          </goals>
      </execution>
  </executions>
</plugin>

did not worked for me, i'm still getting the same error.
Oddly enough, the entity test i managed to run before, does not run now even after uncommenting plugin

amitlevy21 on 28 Nov 2018

I am having the same issue running tests since last week. Get this error in output panel [ERROR] Error: Could not find or load main class com.microsoft.java.test.runner.Launcher. Running mvn test runs the tests as normal.

I have uninstalled the extension ,reloaded vscode, then reinstalled.

java test runner 0.11.1
vscode 1.29.1
java 1.8.0_181
junit 4.12
ubuntu 8.10

zerosandones on 29 Nov 2018

P.S I am not using sprint boot in my project

zerosandones on 29 Nov 2018

Ok did some playing around after I saw that the other two people were using spring boot. I tried another project that was a basic java project and the tests worked. Then I started added dependencies from the other project that didn't work and had an issue as soon as I added kumuluzee-bom and the micro profile 1.2

   <groupId>com.kumuluz.ee</groupId>
   <artifactId>kumuluzee-bom</artifactId>
   <version>2.53</version>
   <type>pom</type>
   <scope>import</scope>

   <groupId>com.kumuluz.ee</groupId>
   <artifactId>kumuluzee-microProfile-1.2</artifactId>
   <version>2.5.3</version>

I have not updated these dependenies to a new version for a while so don't think the issue is with them.

zerosandones on 29 Nov 2018

Confirming, I'm experiencing this issue on Ubuntu 16.04
Exact same project works on Mojave 10.14.1 and Windows 10 (not sure of the version, ran by a colleague).

VS Code 1.29.1

I do not have the kumuluz dependency that zerosandones mentioned.

jonfriesen on 29 Nov 2018

zerosandones on 29 Nov 2018

👍2

Confirming @zerosandones note, upgrading to 1.8.0_191 fixes the problem for me. Thank-you! :+1:

jonfriesen on 30 Nov 2018

👍1

i've update my jre to 1.8.0_191 with the command sudo apt-get install default-jre
here is my java -version output -> openjdk version "1.8.0_191" OpenJDK Runtime Environment (build 1.8.0_191-8u191-b12-0ubuntu0.16.04.1-b12) OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)
I can run the tests, but the ElementRestControllerTest test I'm trying to run, hangs the extension with the message Running tests although I'm seeing the logs i provided before:
[INFO] @@<TestRunner-{"name":"testFinished", "attributes":{"name":"com.sheena.playground.api.ElementRestControllerTest#getElementByItsIDSuccessfully", "duration":"36"}}-TestRunner> @@<TestRunner-{"name":"testSuiteFinished", "attributes":{"name":"com.sheena.playground.api.ElementRestControllerTest"}}-TestRunner> @@<TestRunner-{"name":"testSummary", "attributes":{"message":"Total tests run: 7, Failures: 0, Skips: 0"}}-TestRunner>
@jdneo should i open a different issue and close this one?
Edit:
i think my issue can relate to #482

amitlevy21 on 30 Nov 2018

Looks like upgrade java version to the latest can solve the problem.

@amitlevy21 Yes there is a same issue as yours. Let's track your problem in #482

Thanks.

jdneo on 1 Dec 2018

Debian 9 openjdk fails, I installed Amazon Corretto and it is working now:

Do not work:
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-2~deb9u1-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

Works:

openjdk version "1.8.0_202"
OpenJDK Runtime Environment Corretto-8.202.08.2 (build 1.8.0_202-b08)
OpenJDK 64-Bit Server VM Corretto-8.202.08.2 (build 25.202-b08, mixed mode)

It seems to be an issue with the jdk version.