Add diagnostic tests against Java 9

These tests currently won't run if you don't have environment variable
JDK_9 set up

compiler/testData/diagnostics/testsWithJava9/kt11167.kt

@@ -0,0 +1,13 @@
+import java.util.stream.IntStream
+
+fun foo(s: IntStream) {
+    val n = 1000000000
+    val delta = 1.0 / n
+    val startTimeNanos = System.nanoTime()
+    val pi = 4.0 * delta * s.mapToDouble { i ->
+        val x = (i - 0.5) * delta
+        1.0 / (1.0 + x * x)
+    }.sum()
+    val elapseTime = (System.nanoTime() - startTimeNanos) / 1e9
+    println("Parallel Streams $pi $n $elapseTime")
+}

compiler/testData/diagnostics/testsWithJava9/kt11167.txt

@@ -0,0 +1,3 @@
+package
+
+public fun foo(/*0*/ s: java.util.stream.IntStream): kotlin.Unit

compiler/tests-common/org/jetbrains/kotlin/test/KotlinTestUtils.java

@@ -459,7 +459,18 @@ public class KotlinTestUtils {
             JvmContentRootsKt.addJvmClasspathRoot(configuration, findAndroidApiJar());
         }
         else if (jdkKind == TestJdkKind.FULL_JDK_6) {
-            JvmContentRootsKt.addJvmClasspathRoots(configuration, PathUtil.getJdkClassesRootsFromJre(getJre6Home()));
+            String jdk6 = System.getenv("JDK_16");
+            assert jdk6 != null : "Environment variable JDK_16 is not set";
+            JvmContentRootsKt.addJvmClasspathRoots(configuration, PathUtil.getJdkClassesRootsFromJre(getJreHome(jdk6)));
+        }
+        else if (jdkKind == TestJdkKind.FULL_JDK_9) {
+            String jdk9 = System.getenv("JDK_9");
+            if (jdk9 != null) {
+                JvmContentRootsKt.addJvmClasspathRoots(configuration, PathUtil.getJdkClassesRootsFromJre(getJreHome(jdk9)));
+            }
+            else {
+                System.err.println("Environment variable JDK_9 is not set, the test will be skipped");
+            }
         }
         else {
             JvmContentRootsKt.addJvmClasspathRoots(configuration, PathUtil.getJdkClassesRootsFromCurrentJre());
@@ -484,12 +495,9 @@ public class KotlinTestUtils {
     }
 
     @NotNull
-    private static String getJre6Home() {
-        String home = System.getenv("JDK_16");
-        if (home == null) throw new AssertionError("Environment variable JDK_16 is not set");
-
-        File jre = new File(home, "jre");
-        return jre.isDirectory() ? jre.getPath() : home;
+    private static String getJreHome(@NotNull String jdkHome) {
+        File jre = new File(jdkHome, "jre");
+        return jre.isDirectory() ? jre.getPath() : jdkHome;
     }
 
     public static void resolveAllKotlinFiles(KotlinCoreEnvironment environment) throws IOException {

compiler/tests-common/org/jetbrains/kotlin/test/TestJdkKind.java

@@ -23,6 +23,8 @@ public enum TestJdkKind {
     MODIFIED_MOCK_JDK,
     // JDK found at $JDK_16
     FULL_JDK_6,
+    // JDK found at $JDK_9
+    FULL_JDK_9,
     // JDK found at java.home
     FULL_JDK,
     ANDROID_API,

compiler/tests/org/jetbrains/kotlin/checkers/AbstractDiagnosticsWithJdk9Test.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010-2017 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 org.jetbrains.kotlin.checkers;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.kotlin.test.ConfigurationKind;
+import org.jetbrains.kotlin.test.TestJdkKind;
+
+import java.io.File;
+import java.util.List;
+import java.util.Map;
+
+public abstract class AbstractDiagnosticsWithJdk9Test extends AbstractDiagnosticsTest {
+    @NotNull
+    @Override
+    protected ConfigurationKind getConfigurationKind() {
+        return ConfigurationKind.ALL;
+    }
+
+    @NotNull
+    @Override
+    protected TestJdkKind getTestJdkKind() {
+        return TestJdkKind.FULL_JDK_9;
+    }
+
+    @Override
+    protected void doMultiFileTest(
+            @NotNull File file,
+            @NotNull Map<String, ModuleAndDependencies> modules,
+            @NotNull List<TestFile> testFiles
+    ) {
+        if (System.getenv("JDK_9") == null) {
+            // Skip this test if no environment variable JDK_9 is set up
+            return;
+        }
+        super.doMultiFileTest(file, modules, testFiles);
+    }
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsWithJdk9TestGenerated.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2010-2017 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 org.jetbrains.kotlin.checkers;
+
+import com.intellij.testFramework.TestDataPath;
+import org.jetbrains.kotlin.test.JUnit3RunnerWithInners;
+import org.jetbrains.kotlin.test.KotlinTestUtils;
+import org.jetbrains.kotlin.test.TargetBackend;
+import org.jetbrains.kotlin.test.TestMetadata;
+import org.junit.runner.RunWith;
+
+import java.io.File;
+import java.util.regex.Pattern;
+
+/** This class is generated by {@link org.jetbrains.kotlin.generators.tests.TestsPackage}. DO NOT MODIFY MANUALLY */
+@SuppressWarnings("all")
+@TestMetadata("compiler/testData/diagnostics/testsWithJava9")
+@TestDataPath("$PROJECT_ROOT")
+@RunWith(JUnit3RunnerWithInners.class)
+public class DiagnosticsWithJdk9TestGenerated extends AbstractDiagnosticsWithJdk9Test {
+    public void testAllFilesPresentInTestsWithJava9() throws Exception {
+        KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/diagnostics/testsWithJava9"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+    }
+
+    @TestMetadata("kt11167.kt")
+    public void testKt11167() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJava9/kt11167.kt");
+        doTest(fileName);
+    }
+}

generators/src/org/jetbrains/kotlin/generators/tests/GenerateTests.kt

@@ -205,6 +205,10 @@ fun main(args: Array<String>) {
             model("diagnostics/testWithModifiedMockJdk")
         }
 
+        testClass<AbstractDiagnosticsWithJdk9Test> {
+            model("diagnostics/testsWithJava9")
+        }
+
         testClass<AbstractMultiPlatformIntegrationTest> {
             model("multiplatform", extension = null, recursive = true, excludeParentDirs = true)
         }