Implement fallback strategies

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

@@ -0,0 +1,54 @@
+package org.jetbrains.kotlin.gradle
+
+import org.jetbrains.kotlin.gradle.util.getFileByName
+import org.junit.Test
+
+class ExecutionStrategyIT(): BaseGradleIT() {
+    companion object {
+        private const val GRADLE_VERSION = "2.10"
+    }
+
+    @Test
+    fun testDaemon() {
+        doTestExecutionStrategy("daemon")
+    }
+
+    @Test
+    fun testInProcess() {
+        doTestExecutionStrategy("in-process")
+    }
+
+    @Test
+    fun testOutOfProcess() {
+        doTestExecutionStrategy("out-of-process")
+    }
+
+    private fun doTestExecutionStrategy(executionStrategy: String) {
+        val project = Project("kotlinBuiltins", GRADLE_VERSION)
+        setupProject(project)
+
+        val strategyCLIArg = "-Dkotlin.compiler.execution.strategy=$executionStrategy"
+        val finishMessage = "Finished executing kotlin compiler using $executionStrategy strategy"
+
+        project.build("build", strategyCLIArg) {
+            assertSuccessful()
+            assertContains(finishMessage)
+            checkOutput()
+        }
+
+        val fKt = project.projectDir.getFileByName("f.kt")
+        fKt.delete()
+        project.build("build", strategyCLIArg) {
+            assertFailed()
+            assertContains(finishMessage)
+            assert(output.contains("Unresolved reference: f", ignoreCase = true))
+        }
+    }
+
+    protected open fun setupProject(project: Project) {
+    }
+
+    protected open fun CompiledProject.checkOutput() {
+        assertFileExists("app/build/classes/main/foo/MainKt.class")
+    }
+}

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

@@ -17,6 +17,7 @@ class SimpleKotlinGradleIT : BaseGradleIT() {
 
         project.build("compileDeployKotlin", "build") {
             assertSuccessful()
+            assertContains("Finished executing kotlin compiler using daemon strategy")
             assertReportExists("build/reports/tests/classes/demo.TestSource.html")
             assertContains(":compileKotlin", ":compileTestKotlin", ":compileDeployKotlin")
         }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlinBuiltins/app/src/main/kotlin/f.kt

@@ -0,0 +1,3 @@
+package foo
+
+fun f(fn: (x: Int)->Unit) {}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlinBuiltins/app/src/main/kotlin/main.kt

@@ -1,3 +1,5 @@
 package foo
 
-fun f(fn: (x: Int)->Unit) {}
+fun main() {
+    f { it * 2 }
+}