jdk/test/javax/sound/sampled/spi/MixerProvider/ExpectedNPEOnNull.java
changeset 34412 bed825be8cd8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/sound/sampled/spi/MixerProvider/ExpectedNPEOnNull.java	Sun Nov 22 17:27:33 2015 +0300
@@ -0,0 +1,88 @@
+/*
+ * 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.
+ */
+
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.Mixer;
+import javax.sound.sampled.spi.MixerProvider;
+
+import static java.util.ServiceLoader.load;
+
+/**
+ * @test
+ * @bug 8135100
+ * @author Sergey Bylokhov
+ */
+public final class ExpectedNPEOnNull {
+
+    public static void main(final String[] args) throws Exception {
+        testAS();
+        for (final MixerProvider mp : load(MixerProvider.class)) {
+            testMP(mp);
+        }
+        testMP(customMP);
+    }
+
+    /**
+     * Tests the part of AudioSystem API, which implemented via MixerProvider.
+     */
+    private static void testAS() {
+        try {
+            AudioSystem.getMixer(null); // null should be accepted
+        } catch (final SecurityException | IllegalArgumentException ignored) {
+            // skip the specified exceptions only
+        }
+    }
+
+    /**
+     * Tests the MixerProvider API directly.
+     */
+    private static void testMP(MixerProvider mp) {
+        try {
+            mp.isMixerSupported(null);
+            throw new RuntimeException("NPE is expected: " + mp);
+        } catch (final NullPointerException ignored) {
+
+        }
+        try {
+            mp.getMixer(null); // null should be accepted
+        } catch (SecurityException | IllegalArgumentException e) {
+            // skip the specified exceptions only
+        }
+    }
+
+    /**
+     * Tests some default implementation of MixerProvider API, using the
+     * custom {@code MixerProvider}, which support nothing.
+     */
+    static final MixerProvider customMP = new MixerProvider() {
+        @Override
+        public Mixer.Info[] getMixerInfo() {
+            return new Mixer.Info[0];
+        }
+
+        @Override
+        public Mixer getMixer(Mixer.Info info) {
+            return null;
+        }
+    };
+}