Fix test failures caused by mockk not cleaning up

Author: rli

plugins/core/jetbrains-community/tst/software/aws/toolkits/jetbrains/utils/ThreadingUtilsKtTest.kt

@@ -10,7 +10,8 @@ import com.intellij.openapi.progress.ProgressManager
 import com.intellij.testFramework.ApplicationRule
 import com.intellij.util.concurrency.AppExecutorUtil
 import io.mockk.every
-import io.mockk.mockk
+import io.mockk.impl.annotations.MockK
+import io.mockk.junit4.MockKRule
 import org.assertj.core.api.Assertions.assertThatThrownBy
 import org.junit.Assert.assertEquals
 import org.junit.Rule
@@ -26,6 +27,12 @@ class ThreadingUtilsKtTest {
     @JvmField
     val application = ApplicationRule()
 
+    @get:Rule
+    val mockkRule = MockKRule(this)
+
+    @MockK
+    private lateinit var pluginResolver: PluginResolver
+
     @Test
     fun `computeOnEdt runs on edt`() {
         computeOnEdt {
@@ -78,9 +85,7 @@ class ThreadingUtilsKtTest {
 
     @Test
     fun `pluginAwareExecuteOnPooledThread inherits plugin resolver`() {
-        val pluginResolver = mockk<PluginResolver> {
-            every { product } returns AWSProduct.AMAZON_Q_FOR_JET_BRAINS
-        }
+        every { pluginResolver.product } returns AWSProduct.AMAZON_Q_FOR_JET_BRAINS
         PluginResolver.setThreadLocal(pluginResolver)
 
         pluginAwareExecuteOnPooledThread {