Add example scripting hosts with tests:

the simple scripting host and the one with maven resolving

libraries/examples/scripting/jvm-simple-script/build.gradle.kts

@@ -0,0 +1 @@
+import org.jetbrains.kotlin.gradle.dsl.Coroutines

libraries/examples/scripting/jvm-simple-script/src/org/jetbrains/kotlin/script/examples/jvm/simple/host.kt

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+/*
+ * Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.script.examples.jvm.simple
+
+import org.jetbrains.kotlin.script.util.KotlinJars
+import org.jetbrains.kotlin.utils.PathUtil
+import java.io.File
+import kotlin.script.experimental.api.*
+import kotlin.script.experimental.definitions.ScriptDefinitionFromAnnotatedBaseClass
+import kotlin.script.experimental.host.toScriptSource
+import kotlin.script.experimental.jvm.*
+import kotlin.script.experimental.jvmhost.impl.KJVMCompilerImpl
+
+val stdlibFile: File by lazy {
+    KotlinJars.stdlib
+            ?: throw Exception("Unable to find kotlin stdlib, please specify it explicitly via \"kotlin.java.stdlib.jar\" property")
+}
+
+val selfFile: File by lazy {
+    PathUtil.getResourcePathForClass(MyScript::class.java).takeIf(File::exists)
+            ?: throw Exception("Unable to get path to the script base")
+}
+
+fun myJvmConfig(vararg params: Pair<TypedKey<*>, Any?>): ScriptCompileConfiguration =
+    jvmConfigWithJavaHome(
+        ScriptCompileConfigurationParams.scriptSignature to ScriptSignature(MyScript::class, ProvidedDeclarations.Empty),
+        ScriptCompileConfigurationParams.dependencies to listOf(
+            JvmDependency(listOf(stdlibFile)),
+            JvmDependency(listOf(selfFile))
+        ),
+        *params
+    )
+
+
+fun evalFile(scriptFile: File): ResultWithDiagnostics<EvaluationResult> {
+    val scriptCompiler = JvmScriptCompiler(KJVMCompilerImpl(), DummyCompiledJvmScriptCache())
+    val scriptDefinition = ScriptDefinitionFromAnnotatedBaseClass(MyScript::class)
+
+    val host = JvmBasicScriptingHost(
+        scriptDefinition.configurator,
+        scriptCompiler,
+        scriptDefinition.runner
+    )
+
+    return host.eval(myJvmConfig(scriptFile.toScriptSource().toConfigEntry()), ScriptEvaluationEnvironment())
+}
+
+fun main(vararg args: String) {
+    if (args.size != 1) {
+        println("usage: <app> <script file>")
+    } else {
+        val scriptFile = File(args[0])
+        println("Executing script $scriptFile")
+
+        val res = evalFile(scriptFile)
+
+        res.reports.forEach {
+            println(" : ${it.message}" + if (it.exception == null) "" else ": ${it.exception}")
+        }
+    }
+}

libraries/examples/scripting/jvm-simple-script/src/org/jetbrains/kotlin/script/examples/jvm/simple/scriptDef.kt

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+/*
+ * Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.script.examples.jvm.simple
+
+import kotlin.script.experimental.annotations.KotlinScript
+import kotlin.script.experimental.basic.DefaultScriptSelector
+import kotlin.script.experimental.basic.PassThroughConfigurator
+import kotlin.script.experimental.jvm.runners.BasicJvmScriptRunner
+
+@KotlinScript(DefaultScriptSelector::class, PassThroughConfigurator::class, BasicJvmScriptRunner::class)
+abstract class MyScript {
+//    abstract fun body(vararg args: String): Int
+}

libraries/examples/scripting/jvm-simple-script/test/org/jetbrains/kotlin/script/examples/jvm/simple/test/simpleTest.kt

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+/*
+ * Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.script.examples.jvm.simple.test
+
+import org.jetbrains.kotlin.script.examples.jvm.simple.evalFile
+import org.junit.Assert
+import java.io.File
+import org.junit.Test
+import kotlin.script.experimental.api.ResultWithDiagnostics
+
+class SimpleTest {
+
+    @Test
+    fun testSimple() {
+        val res = evalFile(File("testData/hello.kts"))
+
+        Assert.assertTrue(
+            "test failed:\n  ${res.reports.joinToString("\n  ") { it.message + if (it.exception == null) "" else ": ${it.exception}" }}",
+            res is ResultWithDiagnostics.Success
+        )
+    }
+
+    @Test
+    fun testError() {
+        val res = evalFile(File("testData/error.kts"))
+
+        Assert.assertTrue(
+            "test failed - expecting a failure with the message \"Unresolved reference: abracadabra\" but received " +
+                    (if (res is ResultWithDiagnostics.Failure) "failure" else "success") +
+                    ":\n  ${res.reports.joinToString("\n  ") { it.message + if (it.exception == null) "" else ": ${it.exception}" }}",
+            res is ResultWithDiagnostics.Failure && res.reports.any { it.message.contains("Unresolved reference: abracadabra") })
+    }
+}

libraries/examples/scripting/jvm-simple-script/testData/error.kts

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+
+abracadabra("Hello, World!")
+

libraries/examples/scripting/jvm-simple-script/testData/hello.kts

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+
+println("Hello, World!")
+