title: java.lang.NoSuchMethodError: org.junit.platform.launcher.Launcher.execute
body: <p>I'm trying to run the following example unit test case</p>
  
  <pre><code>class ExampleUnitTest {
  
      @Test
      fun addition_is_Correct() {
          assertEquals(4, (2 + 2).toLong())
      }
  
  }
  </code></pre>
  
  <p>but I get the following exception</p>
  
  <pre><code>Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.launcher.Launcher.execute(Lorg/junit/platform/launcher/LauncherDiscoveryRequest;)V
      at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:61)
      at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
      at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
      at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)
  </code></pre>
  
  <p>even though I have updated all the Junit dependencies build.gradle file like given below</p>
  
  <pre><code>testImplementation 'junit:junit:4.12'
  testImplementation 'org.jetbrains.spek:spek-api:1.1.5'
  testImplementation 'org.jetbrains.spek:spek-junit-platform-engine:1.1.5'
  testImplementation 'org.junit.platform:junit-platform-launcher:1.0.0'
  testImplementation 'org.junit.platform:junit-platform-runner:1.0.0'
  testImplementation 'org.junit.vintage:junit-vintage-engine:4.12.3'
  testImplementation 'org.junit.jupiter:junit-jupiter-api:5.0.0'
  testImplementation 'org.junit.jupiter:junit-jupiter-params:5.0.0'
  testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.0.0'
  </code></pre>
  
  <p>is there any solution for this?</p>