[Gradle, JS] Add test for KT-47154 regression

#KT-47154 Fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -938,3 +938,16 @@ abstract class AbstractKotlin2JsGradlePluginIT(val irBackend: Boolean) : BaseGra
                 Gson().fromJson(it.readText(), PackageJson::class.java)
             }
 }
+
+class GeneralKotlin2JsGradlePluginIT : BaseGradleIT() {
+    @Test
+    fun testJsBothModeWithTests() = with(Project("kotlin-js-both-mode-with-tests")) {
+        setupWorkingDir()
+        gradleBuildScript().modify(::transformBuildScriptWithPluginsDsl)
+
+        build("build") {
+            assertSuccessful()
+            assertNoWarnings()
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin-js-both-mode-with-tests/build.gradle.kts

@@ -0,0 +1,18 @@
+plugins {
+    kotlin("js").version("<pluginMarkerVersion>")
+}
+
+group = "com.example"
+version = "1.0"
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+}
+
+kotlin {
+    js(BOTH) {
+        nodejs {
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin-js-both-mode-with-tests/settings.gradle.kts

@@ -0,0 +1,8 @@
+pluginManagement {
+    repositories {
+        mavenLocal()
+        gradlePluginPortal()
+    }
+}
+
+rootProject.name = "kotlin-js-both-mode-with-tests"

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin-js-both-mode-with-tests/src/main/kotlin/app.kt

@@ -0,0 +1 @@
+fun foo() = 5

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin-js-both-mode-with-tests/src/test/kotlin/test.kt

@@ -0,0 +1 @@
+fun bar() = foo()