JS unit testing task will be skipped if there are no tests in the pro…

…ject

gradle.properties

@@ -1,6 +1,6 @@
-projectVersion=1.4.0
+projectVersion=1.4.1
 projectDescription=A Gradle plugin that simplifies the creation of %type% multiplatform Kotlin projects.
-projectChangelog=MultiGradle now uses new Kotlin Multiplatform plugin
+projectChangelog=JS unit testing task will be skipped if there are no tests in the project
 
 nodeVersion=1.3.1
 kotlinVersion=1.3.21

src/main/kotlin/ru/pearx/multigradle/util/initializers/JsInitializer.kt

@@ -8,12 +8,15 @@ import com.moowork.gradle.node.NodePlugin
 import com.moowork.gradle.node.npm.NpmTask
 import com.moowork.gradle.node.task.NodeTask
 import org.gradle.api.Project
+import org.gradle.api.Task
 import org.gradle.api.tasks.Sync
+import org.gradle.api.tasks.TaskProvider
 import org.gradle.api.tasks.testing.Test
 import org.gradle.kotlin.dsl.*
 import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
 import ru.pearx.multigradle.util.MultiGradleExtension
 import ru.pearx.multigradle.util.invoke
+import java.nio.file.Files
 
 internal fun Project.jsInitializer() {
     apply<NodePlugin>()
@@ -85,5 +88,18 @@ internal fun Project.jsInitializer() {
         named<Test>("jsTest") {
             dependsOn(jsTestRunMocha)
         }
+
+        listOf<TaskProvider<out Task>>(jsTestRunMocha, jsTestSyncNodeModules, jsTestInstallPackages, named("npmSetup"), named("nodeSetup")).forEach { task ->
+            task.configure {
+                onlyIf {
+                    try {
+                        Files.newDirectoryStream(jsTestCompilation.output.classesDirs.first().toPath()).use { f -> f.iterator().hasNext() }
+                    }
+                    catch(e: Exception) {
+                        false
+                    }
+                }
+            }
+        }
     }
 }