Support psi tests for standard stream api

idea/tests/com/intellij/debugger/streams/kotlin/JdkManager.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2000-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.debugger.streams.kotlin
+
+import com.intellij.openapi.projectRoots.JavaSdk
+import com.intellij.openapi.projectRoots.Sdk
+import com.intellij.openapi.projectRoots.impl.JavaSdkImpl
+
+import java.io.File
+
+/**
+ * @author Vitaliy.Bibaev
+ */
+object JdkManager {
+  private val MOCK_JDK_DIR_NAME_PREFIX = "mockJDK-"
+  val JDK18_PATH: String = File("lib/" + MOCK_JDK_DIR_NAME_PREFIX + "1.8").absolutePath
+
+  val mockJdk18: Sdk by lazy { (JavaSdk.getInstance() as JavaSdkImpl).createMockJdk("java 1.8", JDK18_PATH, false) }
+}

idea/tests/com/intellij/debugger/streams/kotlin/KotlinPsiChainBuilderTestCase.kt

@@ -3,6 +3,8 @@ package com.intellij.debugger.streams.kotlin
 import com.intellij.debugger.streams.test.StreamChainBuilderTestCase
 import com.intellij.debugger.streams.wrapper.StreamChain
 import com.intellij.debugger.streams.wrapper.StreamChainBuilder
+import com.intellij.openapi.projectRoots.Sdk
+import com.intellij.pom.java.LanguageLevel
 import junit.framework.TestCase
 import java.io.File
 import java.nio.file.Paths
@@ -21,6 +23,10 @@ abstract class KotlinPsiChainBuilderTestCase(private val relativePath: String) :
 
   override final fun getRelativeTestPath(): String = relativePath
 
+  override fun getProjectJDK(): Sdk {
+    return JdkManager.mockJdk18
+  }
+
   abstract class Positive(relativePath: String) : KotlinPsiChainBuilderTestCase(relativePath) {
     override fun doTest() {
       val chains = buildChains()