--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/modules/SubpackageTest.java	Thu Mar 17 19:04:28 2016 +0000
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2015, 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
+ * @summary tests for subpackage issues
+ * @library /tools/lib
+ * @modules
+ *      jdk.compiler/com.sun.tools.javac.api
+ *      jdk.compiler/com.sun.tools.javac.main
+ *      jdk.jdeps/com.sun.tools.javap
+ * @build ToolBox ModuleTestBase
+ * @run main SubpackageTest
+ */
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class SubpackageTest extends ModuleTestBase {
+
+    public static void main(String... args) throws Exception {
+        SubpackageTest t = new SubpackageTest();
+        t.runTests();
+    }
+
+    @Test // based on JDK-8075435
+    void testUnnamedModule(Path base) throws Exception {
+        Path libsrc = base.resolve("lib/src");
+        tb.writeJavaFiles(libsrc,
+            "package p; public class E extends Error { }");
+        Path libclasses = base.resolve("lib/classes");
+        Files.createDirectories(libclasses);
+        tb.new JavacTask()
+                .outdir(libclasses)
+                .files(findJavaFiles(libsrc))
+                .run()
+                .writeAll();
+
+        Path src = base.resolve("src");
+        tb.writeJavaFiles(src,
+            "package p.q;\n"
+            + "import p.E;\n"
+            + "class Test {\n"
+            + "  void m() { throw new E(); }\n"
+            + "}");
+        Path classes = base.resolve("classes");
+        Files.createDirectories(classes);
+
+        tb.new JavacTask()
+                .classpath(libclasses)
+                .outdir(classes)
+                .files(findJavaFiles(src))
+                .run()
+                .writeAll();
+    }
+
+    @Test
+    void testSimpleMulti(Path base) throws Exception {
+        Path src = base.resolve("src");
+        tb.writeJavaFiles(src.resolve("mp"),
+                "module mp { exports p; }",
+                "package p; public class C1 { }");
+        tb.writeJavaFiles(src.resolve("mpq"),
+                "module mpq { exports p.q; }",
+                "package p.q; public class C2 { }");
+        tb.writeJavaFiles(src.resolve("mpqr"),
+                "module mpqr { exports p.q.r; }",
+                "package p.q.r; public class C3 { }");
+        tb.writeJavaFiles(src.resolve("m"),
+                "module m {"
+                + "  requires mp;\n"
+                + "  requires mpq;\n"
+                + "  requires mpqr;\n"
+                + "}",
+                "package x;\n"
+                + "class C {\n"
+                + "  p.C1 c1;\n"
+                + "  p.q.C2 c2;\n"
+                + "  p.q.r.C3 c3;\n"
+                + "}");
+        Path modules = base.resolve("modules");
+        Files.createDirectories(modules);
+
+        tb.new JavacTask()
+                .options("-modulesourcepath", src.toString())
+                .outdir(modules)
+                .files(findJavaFiles(src))
+                .run()
+                .writeAll();
+    }
+
+}