fix test harness

For some reason, our old way of adding libraries to the test environment
stopped working and we need to use a different way.

Also, the test rule need to be updated since the test environment now
is more properly "faked" and the old rule hangs forever

intellij/src/test/kotlin/motif/intellij/TestHarness.kt

@@ -23,6 +23,7 @@ import com.intellij.testFramework.PsiTestUtil
 import com.intellij.testFramework.fixtures.DefaultLightProjectDescriptor
 import com.intellij.testFramework.fixtures.LightJavaCodeInsightFixtureTestCase
 import java.io.File
+import java.net.URI
 import javax.annotation.Nullable
 import javax.inject.Inject
 import kotlin.reflect.KClass
@@ -63,10 +64,18 @@ class TestHarness : LightJavaCodeInsightFixtureTestCase() {
   }
 
   private fun addLibrary(clazz: KClass<*>) {
-    val path = clazz.java.protectionDomain.codeSource.location.path
-    val file = File(path)
-    val libName = file.name
-    PsiTestUtil.addLibrary(myFixture.projectDisposable, module, libName, file.parent, libName)
+    val fileUri =
+        clazz
+            .java
+            .getResource(clazz.simpleName + ".class")
+            ?.toString()
+            ?.let { Regex("file:.*[.]jar").find(it)?.value }
+            ?.let { URI.create(it) }
+    if (fileUri != null) {
+      val file = File(fileUri)
+      val libName = file.name
+      PsiTestUtil.addLibrary(myFixture.projectDisposable, module, libName, file.parent, libName)
+    }
   }
 
   @Test

intellij/testing/src/main/kotlin/motif/intellij/testing/IntelliJRule.kt

@@ -15,9 +15,7 @@
  */
 package motif.intellij.testing
 
-import com.intellij.openapi.application.ApplicationManager
 import com.intellij.testFramework.TestApplicationManager
-import java.util.concurrent.CountDownLatch
 import org.junit.rules.TestRule
 import org.junit.runner.Description
 import org.junit.runners.model.Statement
@@ -29,21 +27,6 @@ class IntelliJRule : TestRule {
 
       override fun evaluate() {
         TestApplicationManager.getInstance()
-        var e: Throwable? = null
-        val latch = CountDownLatch(1)
-        ApplicationManager.getApplication().invokeLater {
-          ApplicationManager.getApplication().runReadAction {
-            try {
-              base.evaluate()
-            } catch (throwable: Throwable) {
-              e = throwable
-            } finally {
-              latch.countDown()
-            }
-          }
-        }
-        latch.await()
-        e?.let { throw it }
       }
     }
   }