java.lang.Exception: 没有使用 Intellij IDEA 找到匹配方法的测试

Question

I am experiencing a strange behavior of Intellij IDEA 2016.3. Having a class with method foo and a JUnit test for the method when I get java.lang.Exception: No tests found matching Method foo when running the test. After I do mvn test it succeeds and then running the unit test right after executing mvn command it suddenly runs green. Seems like IDEA does not compile automatically. How can I fix this?

PS No settings were altered after upgrading to v. 2016.3

Answer 1

If you're using a theory testing framework like Junit's or Robolectric's , make sure to run the class containing the test you want, instead the test itself. Since these frameworks use the test methods as instance methods instead of static methods, any testing framework looking for a normal public static test won't find anything.

Answer 2

The same issue i got with Gradle (4.5+) + new Build Cache feature

Sometimes it's unable to find new test methods and throws exception (like you mentioned in topic)

Solution: clean .gradle , build and out directories and try again ;)

Answer 3

Well, after "playing" a bit with run configurations of each unit test I noticed that each Run Config has a Build goal preset in the Before Launch option (See pic below):

After changing Build to Build Project the tests run fine.

Answer 4

If you originally run a test named "foo", and then rename it to "fooBar", you must subsequently run "fooBar" with a new Run Configuration .

If you use the same original Run Configuration for "foo" to run "fooBar", it still looks for a test named "foo" which it does not find (thus the Exception) because it was renamed to "fooBar". The new Run Configuration would correctly look for "fooBar" test.

I made this mistake unknowingly because I renamed a test, but then just clicked the green run button in IntelliJ: Doing that runs the last Run Configuration, which in this scenario has the old "foo" name.

Answer 5

删除 Intellij 的 out 目录为我解决了这个问题。

Answer 6

In addition to the other answers here: the error can also happen when you forget @Test before your test method declaration. IntelliJ (2018.1) will still show you the green "Play-Button" for test execution, but that public method in your Test-Class will not be an actual test.

Answer 7

确保您的@test方法以及测试类都是public 。

Answer 8

如果没有在测试方法上方放置@Test注解，也会出现这种情况。

Answer 9

Since you got your answer and for others searching for solution,

Look if your test class is extending TestCase abstract class which is a JUnit 3 related. In order to fix this you have to start your method name with "test". For example public void testFoo() .

If JUnit 3 is not the case, you're missing @Test annotation from your JUnit 4 test method.

Note: If you're extending from TestCase and test methods are annotated with @Test and also your methods' names start with "test", then probably you're mixing JUnit 3 with JUnit 4. Don't do that. It will lead to other errors such as methods that annotated with @Ignore will not be ignored if those methods' names start with "test".

Answer 10

Maybe you just give a wrong name for test method.

I met this problem because I used '—' instead of '_' which intelliJ cannot represent.

Answer 11

Make sure you've correct runner mentioned above your class.

I was getting this weird message when I was using runner CucumberWithSerenity.class . When I changed to SerenityRunner.class it got fixed.

@RunWith(SerenityRunner.class)
//@RunWith(CucumberWithSerenity.class)
public class WordPressAppTest {

I'm using Serenity framework for web automation and use below runner class

import net.serenitybdd.cucumber.CucumberWithSerenity;
import net.serenitybdd.junit.runners.SerenityRunner;
import org.junit.runner.RunWith;

I feel IDEA ( 2017.2.6 ) can show some better error message than this

Answer 12

I had to add test before the test Method Name.

methodtest() does not work but testMethod() worked

Answer 13

Make sure @org.junit.Test is added on top of your method. I forgot them and that fixed it for me!

Answer 14

You may check that Run/Debug Configurations in the top of the IntelliJ screen. Delete all of then with the "minus button" and hit "run" green button again to run the test.

You may reload the project on the maven tab on the right as well.

Answer 15

unfortunately some versions of Junit you must start the Test method name with test. Otherwise, it won't work.

test MyTestingCase()

@Test
public void testMyTestingCase() {
} 

Answer 16

In my case, I copied a test from another class and modified it, but while running the test it was still pointing to the previous one.

Build > Clean Project solved the problem