junit: no tests found

Question

I have inherited a Java project and am new to Java development. I feel a good way for me to get comfortable with the code is to write some tests around it. I'm writing my code using IntelliJ.

My existing project has a folder structure like this:

/myProject
  /src
    /main
      /java
        /com.lexcorp
          /core
            /email
              /providers
                emailProvider.java

I created a new project that will hold tests for this project. I would like this project to hold both unit and integration tests. Currently, my new project has a structure like this:

/myProjectTests
  /src
    /main
      /java
        /com.lexcorp.core.email.providers
          emailProviderTest.java

The emailProviderTest.java file looks like the following:

package com.lexcorp.core.email.providers;

import junit.framework.TestCase;
import org.junit.Test;

public class EmailProviderTest extends TestCase {

    private final String username = "[testAccount]";

    private final String password = "[testPassword]";

    @Test
    public void thisAlwaysPasses() {
        assertTrue(true);
    }
}

This project has a Run/Debug configuration with the following properties:

Test kind: All in package
Search for tests: In whole project

When I run this configuration, I get an error that says:

junit.framework.AssertionFailedError: No tests found in com.lexcorp.core.email.providers.EmailProviderTest
    at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84)
    at org.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:202)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:65)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

I do not understand why I'm getting an error that boils down to: "No tests found". While my project structures differ, the folder structures on the OS match (which is another thing that confuses me). Why am I getting this error and how do I fix it?

score 154 · Accepted Answer · edited Nov 28 '20 at 15:07

154

I was getting this error, too:

junit.framework.AssertionFailedError: No tests found in ...

The reason was that I forgot to specify

defaultConfig {
    ...
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

After syncing the project, it found the tests. So maybe it helps someone else.

edited Nov 28 '20 at 15:07

Max

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answered Feb 08 '16 at 09:11

BlackRainbow

1,754
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10

Is there a way to combine with this //testInstrumentationRunner "android.test.InstrumentationTestRunner"? – powder366 Nov 25 '16 at 18:30
15

Still a helpful hint. For Jetpack this will work: ``testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"`` – wtk Apr 15 '19 at 12:16

score 44 · Answer 2 · edited May 23 '17 at 12:03

44

Extending junit.framework.TestCase is the old JUnit 3 approach of implementing test cases which doesnt work as no methods start with the letters test. Since you're using JUnit 4, just declare the class as

public class EmailProviderTest {

and the test method will be found from the @Test annotation.

Read: JUnit confusion: use 'extend Testcase' or '@Test'?

edited May 23 '17 at 12:03

Community

1
1

answered Mar 18 '14 at 03:00

Reimeus

158,255
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276

When I remove the `extends TestCase` I get a compile-time error that says: java: cannot find symbol symbol: method assertTrue(boolean). – JQuery Mobile Mar 18 '14 at 03:09
1

different issue: you're missing the static import `org.junit.Assert.assertTrue` – Reimeus Mar 18 '14 at 03:11
true, just remove the "extends TestCase()" and the Tests runs! – Tonnie Feb 18 '21 at 12:20

score 28 · Answer 3 · answered Nov 11 '16 at 13:05

28

I was getting this too:

junit.framework.AssertionFailedError: No tests found in ...

Solved by renaming the test method from method1

@Test
public void method1(){
    // Do some stuff...
}

to testMethod1

@Test
public void testMethod1(){
    // Do some stuff...
}

answered Nov 11 '16 at 13:05

lidox

1,901
3
21
40

3

Amazing fix, no once can even image this. – Joy Apr 26 '21 at 12:15
Actually that was a documented behavior. It is obsolete since JUnit4, though. – arkascha Feb 22 '23 at 08:28

score 11 · Answer 4 · answered Mar 22 '17 at 06:07

11

if you are using jUnit 4 then not use extends TestCase, removing this fixed error.

answered Mar 22 '17 at 06:07

dvswapnil

111
1
3

1

fantastic. it fixed – Salvatore Pannozzo Capodiferro May 04 '18 at 13:56

score 9 · Answer 5 · answered Jul 25 '18 at 10:08

I had the same issue, in Intellij IDEA, for Java framework. I was doing all right:

the class inherited from TestCase
I've imported junit.framework.TestCase
I've add the decoration @Test

But I did one thing wrong: the name of the method didn't start with "test", in fact was:

@Test
public void getSomethingTest(){

and when I changed it into:

@Test
public void testGetSomethingTest(){

I've resolved: the executor was finally able to recognize this method as a test method. I've changed nothing else.

Worked for me in Intellij. – Ali Ait-Bachir Feb 06 '19 at 13:51 — Ali Ait-Bachir, Feb 06 '19 at 13:51

score 2 · Answer 6 · answered Feb 13 '20 at 15:31

2

I bumped into the situation in JUnit 5 when created a private method:

import org.junit.jupiter.api.Test

class Test1 {

    @Test
    private fun sort() {
        println("1")
    }
}

Remove private.

answered Feb 13 '20 at 15:31

CoolMind

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score 1 · Answer 7 · answered Aug 08 '18 at 17:09

1

In my case, I needed junit4-version.jar in the classpath of the task junit and also:

ant-version.jar
ant-junit-version.jar
ant-junit4-version.jar

at the library of my ant installation (/usr/share/ant/lib).

I was getting the error "junit.framework.AssertionFailedError: No tests found in ..." while I hadn't had ant-junit4-*version*.jar in the right place.

I corrected this by installing ant-optional debian/ubuntu package:

apt-get install ant-optional

answered Aug 08 '18 at 17:09

Lincoln

181
1
5

I just used both ant-junit-version.jar, ant-junit4-version.jar then it works with me, thanks! – Mohamed AbdElRazek Sep 23 '21 at 13:29

score 0 · Answer 8 · answered Feb 17 '17 at 12:54

I had it when using data provider and one of the parameters had a new line character, like this:

@DataProvider
public static Object[][] invalidAdjustment() {
    return new Object[][]{
            {"some \n text", false},
            };
}

Removing the \n solved the issue

score 0 · Answer 9 · edited Sep 19 '19 at 14:44

0

I was fretting with this and none of the answers helped me until i moved the test source file from this folder:

src/test/java/com/junit/test

up to this folder:

src/test/java/com/junit

edited Sep 19 '19 at 14:44

Dharman

30,962
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answered Sep 19 '19 at 14:10

Ken Coppersmith

1

score -1 · Answer 10 · answered Dec 26 '16 at 19:37

The other reason generally i see people having method parameters, remove any parameters you might have in the test method, regardless you add @Test annotation , you need to have your method name starting "test" in order for Junit to pick you testcase. hope it helps.

score -1 · Answer 11 · answered Jul 07 '17 at 13:49

-1

Test method name public void testName() {}

Where name() in source naming name methods.

answered Jul 07 '17 at 13:49

Fortran

2,218
2
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junit: no tests found

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