--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/processing/model/TestSourceVersion.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 7025809 8028543 6415644 8028544 8029942
+ * @summary Test latest, latestSupported, underscore as keyword, etc.
+ * @author  Joseph D. Darcy
+ * @modules java.compiler
+ *          jdk.compiler
+ */
+
+import java.util.*;
+import javax.lang.model.SourceVersion;
+import static javax.lang.model.SourceVersion.*;
+
+/**
+ * Verify latest[Supported] behavior.
+ */
+public class TestSourceVersion {
+    public static void main(String... args) {
+        testLatestSupported();
+        testVersionVaryingKeywords();
+    }
+
+    private static void testLatestSupported() {
+        if (SourceVersion.latest() != RELEASE_10 ||
+            SourceVersion.latestSupported() != RELEASE_10)
+            throw new RuntimeException("Unexpected release value(s) found:\n" +
+                                       "latest:\t" + SourceVersion.latest() + "\n" +
+                                       "latestSupported:\t" + SourceVersion.latestSupported());
+    }
+
+    private static void testVersionVaryingKeywords() {
+        Map<String, SourceVersion> keyWordStart =
+            Map.of("strictfp", RELEASE_2,
+                   "assert",   RELEASE_4,
+                   "enum",     RELEASE_5,
+                   "_",        RELEASE_9);
+
+        for (Map.Entry<String, SourceVersion> entry : keyWordStart.entrySet()) {
+            String key = entry.getKey();
+            SourceVersion value = entry.getValue();
+
+            check(true, isKeyword(key), "keyword", latest());
+            check(false, isName(key),   "name",    latest());
+
+            for(SourceVersion version : SourceVersion.values()) {
+                boolean isKeyword = version.compareTo(value) >= 0;
+
+                check(isKeyword,  isKeyword(key, version), "keyword", version);
+                check(!isKeyword, isName(key, version),    "name",    version);
+            }
+        }
+    }
+
+    private static void check(boolean result, boolean expected,
+                              String message, SourceVersion version) {
+        if (result != expected) {
+            throw new RuntimeException("Unexpected " + message +  "-ness of _ on " + version);
+        }
+    }
+}