[Gradle] Check if configuration cache was stored in JS CoCa tests

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/JsConfigurationCacheIT.kt

@@ -61,7 +61,9 @@ abstract class AbstractJsConfigurationCacheIT(protected val irBackend: Boolean)
     @GradleTest
     fun testBrowserDistributionOnIdeaPropertyChange(gradleVersion: GradleVersion) {
         project("kotlin-js-browser-project", gradleVersion) {
-            build(":app:build")
+            build(":app:build") {
+                assertConfigurationCacheStored()
+            }
             // check IdeaPropertiesEvaluator for the logic
             build(":app:build", "-Didea.version=2020.1") {
                 assertConfigurationCacheReused()
@@ -99,7 +101,9 @@ abstract class AbstractJsConfigurationCacheIT(protected val irBackend: Boolean)
     @GradleTest
     fun testNodeJsOnIdeaPropertyChange(gradleVersion: GradleVersion) {
         project("kotlin-js-nodejs-project", gradleVersion) {
-            build(":build")
+            build(":build") {
+                assertConfigurationCacheStored()
+            }
             // check IdeaPropertiesEvaluator for the logic
             build(":build", "-Didea.version=2020.1") {
                 assertConfigurationCacheReused()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/configurationCacheHelpers.kt

@@ -33,7 +33,7 @@ fun TestProject.assertSimpleConfigurationCacheScenarioWorks(
             "Calculating task graph as no configuration cache is available for tasks: ${buildArguments.joinToString(separator = " ")}"
         )
 
-        assertOutputContains("Configuration cache entry stored.")
+        assertConfigurationCacheStored()
     }
 
     build("clean", buildOptions = buildOptions)
@@ -51,6 +51,10 @@ fun TestProject.assertSimpleConfigurationCacheScenarioWorks(
     }
 }
 
+fun BuildResult.assertConfigurationCacheStored() {
+    assertOutputContains("Configuration cache entry stored.")
+}
+
 fun BuildResult.assertConfigurationCacheReused() {
     assertOutputContains("Reusing configuration cache.")
 }