--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/sjavac/DependencyCollection.java	Tue Oct 07 21:15:10 2014 +0200
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2014, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 8056258 8048609
+ * @summary Ensures that the DependencyCollector covers various cases.
+ * @library /tools/lib
+ * @build Wrapper ToolBox
+ * @run main Wrapper DependencyCollection
+ */
+
+import java.io.PrintWriter;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+
+import com.sun.tools.javac.api.JavacTaskImpl;
+import com.sun.tools.javac.code.Symbol.PackageSymbol;
+import com.sun.tools.sjavac.comp.SmartFileManager;
+import com.sun.tools.sjavac.comp.dependencies.DependencyCollector;
+
+public class DependencyCollection {
+
+    public static void main(String[] args) {
+        Path src = Paths.get(ToolBox.testSrc, "test-input", "src");
+
+        JavaCompiler javac = ToolProvider.getSystemJavaCompiler();
+        StandardJavaFileManager fileManager = javac.getStandardFileManager(null, null, null);
+        SmartFileManager smartFileManager = new SmartFileManager(fileManager);
+        smartFileManager.setSymbolFileEnabled(false);
+        Iterable<? extends JavaFileObject> fileObjects =
+                fileManager.getJavaFileObjectsFromFiles(Arrays.asList(src.resolve("pkg/Test.java").toFile()));
+        JavacTaskImpl task = (JavacTaskImpl) javac.getTask(new PrintWriter(System.out),
+                                                           smartFileManager,
+                                                           null,
+                                                           Arrays.asList("-d", "classes",
+                                                                         "-sourcepath", src.toAbsolutePath().toString()),
+                                                           null,
+                                                           fileObjects);
+        DependencyCollector depsCollector = new DependencyCollector();
+        task.addTaskListener(depsCollector);
+        task.doCall();
+
+        // Find pkg symbol
+        PackageSymbol pkg = findPkgSymbolWithName(depsCollector.getSourcePackages(), "pkg");
+        Set<PackageSymbol> foundDependencies = depsCollector.getDependenciesForPkg(pkg);
+
+        // Print dependencies
+        System.out.println("Found dependencies:");
+        foundDependencies.stream()
+                         .sorted(Comparator.comparing(DependencyCollection::extractNumber))
+                         .forEach(p -> System.out.println("    " + p));
+
+        // Check result
+        Set<Integer> found = foundDependencies.stream()
+                                              .map(DependencyCollection::extractNumber)
+                                              .collect(Collectors.toSet());
+        found.remove(-1); // Dependencies with no number (java.lang etc)
+        Set<Integer> expected = new HashSet<>();
+        for (int i = 2; i <= 30; i++) {
+            if (i == 15) continue;  // Case 15 correspond to the type of a throw-away return value.
+            expected.add(i);
+        }
+
+        Set<Integer> missing = new HashSet<>(expected);
+        missing.removeAll(found);
+        if (missing.size() > 0) {
+            System.out.println("Missing dependencies:");
+            missing.forEach(i -> System.out.println("    Dependency " + i));
+        }
+
+        Set<Integer> unexpected = new HashSet<>(found);
+        unexpected.removeAll(expected);
+        if (unexpected.size() > 0) {
+            System.out.println("Unexpected dependencies found:");
+            unexpected.forEach(i -> System.out.println("    Dependency " + i));
+        }
+
+        if (missing.size() > 0 || unexpected.size() > 0)
+            throw new AssertionError("Missing and/or unexpected dependencies found.");
+    }
+
+    private static PackageSymbol findPkgSymbolWithName(Set<PackageSymbol> syms, String name) {
+        for (PackageSymbol ps : syms)
+            if (ps.fullname.toString().equals("pkg"))
+                return ps;
+        throw new AssertionError("Could not find package named \"pkg\".");
+    }
+
+    public static int extractNumber(PackageSymbol p) {
+        Matcher m = Pattern.compile("\\d+").matcher(p.fullname.toString());
+        if (!m.find())
+            return -1;
+        return Integer.parseInt(m.group());
+    }
+}