nio/Buffer/BasicChar.java

/*
 * Copyright (c) 2000, 2016, 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.
 */

/* Type-specific source code for unit test
 *
 * Regenerate the BasicX classes via genBasic.sh whenever this file changes.
 * We check in the generated source files so that the test tree can be used
 * independently of the rest of the source tree.
 */

// -- This file was mechanically generated: Do not edit! -- //

import java.nio.*;


public class BasicChar
    extends Basic
{

    private static final char[] VALUES = {
        Character.MIN_VALUE,
        (char) -1,
        (char) 0,
        (char) 1,
        Character.MAX_VALUE,


    };

    private static void relGet(CharBuffer b) {
        int n = b.capacity();
        for (int i = 0; i < n; i++)
            ck(b, (long)b.get(), (long)((char)ic(i)));
        b.rewind();
    }

    private static void relGet(CharBuffer b, int start) {
        int n = b.remaining();
        for (int i = start; i < n; i++)
            ck(b, (long)b.get(), (long)((char)ic(i)));
        b.rewind();
    }

    private static void absGet(CharBuffer b) {
        int n = b.capacity();
        for (int i = 0; i < n; i++)
            ck(b, (long)b.get(), (long)((char)ic(i)));
        b.rewind();
    }

    private static void bulkGet(CharBuffer b) {
        int n = b.capacity();
        char[] a = new char[n + 7];
        b.get(a, 7, n);
        for (int i = 0; i < n; i++) {
            ck(b, (long)a[i + 7], (long)((char)ic(i)));
        }
    }

    private static void relPut(CharBuffer b) {
        int n = b.capacity();
        b.clear();
        for (int i = 0; i < n; i++)
            b.put((char)ic(i));
        b.flip();
    }

    private static void absPut(CharBuffer b) {
        int n = b.capacity();
        b.clear();
        for (int i = 0; i < n; i++)
            b.put(i, (char)ic(i));
        b.limit(n);
        b.position(0);
    }

    private static void bulkPutArray(CharBuffer b) {
        int n = b.capacity();
        b.clear();
        char[] a = new char[n + 7];
        for (int i = 0; i < n; i++)
            a[i + 7] = (char)ic(i);
        b.put(a, 7, n);
        b.flip();
    }

    private static void bulkPutBuffer(CharBuffer b) {
        int n = b.capacity();
        b.clear();
        CharBuffer c = CharBuffer.allocate(n + 7);
        c.position(7);
        for (int i = 0; i < n; i++)
            c.put((char)ic(i));
        c.flip();
        c.position(7);
        b.put(c);
        b.flip();
        try {
            b.put(b);
            fail("IllegalArgumentException expected for put into same buffer");
        } catch (IllegalArgumentException e) {
            if (e.getMessage() == null) {
                fail("Non-null IllegalArgumentException message expected from"
                     + " put into same buffer");
            }
        }
    }

    //6231529
    private static void callReset(CharBuffer b) {
        b.position(0);
        b.mark();

        b.duplicate().reset();
        b.asReadOnlyBuffer().reset();
    }


    // 6221101-6234263

    private static void putBuffer() {
        final int cap = 10;

        CharBuffer direct1 = ByteBuffer.allocateDirect(cap).asCharBuffer();
        CharBuffer nondirect1 = ByteBuffer.allocate(cap).asCharBuffer();
        direct1.put(nondirect1);

        CharBuffer direct2 = ByteBuffer.allocateDirect(cap).asCharBuffer();
        CharBuffer nondirect2 = ByteBuffer.allocate(cap).asCharBuffer();
        nondirect2.put(direct2);

        CharBuffer direct3 = ByteBuffer.allocateDirect(cap).asCharBuffer();
        CharBuffer direct4 = ByteBuffer.allocateDirect(cap).asCharBuffer();
        direct3.put(direct4);

        CharBuffer nondirect3 = ByteBuffer.allocate(cap).asCharBuffer();
        CharBuffer nondirect4 = ByteBuffer.allocate(cap).asCharBuffer();
        nondirect3.put(nondirect4);
    }


    private static void bulkPutString(CharBuffer b) {
        int n = b.capacity();
        b.clear();
        StringBuilder sb = new StringBuilder(n + 7);
        sb.append("1234567");
        for (int i = 0; i < n; i++)
            sb.append((char)ic(i));
        b.put(sb.toString(), 7, 7 + n);
        b.flip();
    }


    private static void checkSlice(CharBuffer b, CharBuffer slice) {
        ck(slice, 0, slice.position());
        ck(slice, b.remaining(), slice.limit());
        ck(slice, b.remaining(), slice.capacity());
        if (b.isDirect() != slice.isDirect())
            fail("Lost direction", slice);
        if (b.isReadOnly() != slice.isReadOnly())
            fail("Lost read-only", slice);
    }


    private static void fail(String problem,
                             CharBuffer xb, CharBuffer yb,
                             char x, char y) {
        fail(problem + String.format(": x=%s y=%s", x, y), xb, yb);
    }

    private static void catchIllegalArgument(Buffer b, Runnable thunk) {
        tryCatch(b, IllegalArgumentException.class, thunk);
    }

    private static void catchReadOnlyBuffer(Buffer b, Runnable thunk) {
        tryCatch(b, ReadOnlyBufferException.class, thunk);
    }

    private static void catchIndexOutOfBounds(Buffer b, Runnable thunk) {
        tryCatch(b, IndexOutOfBoundsException.class, thunk);
    }

    private static void catchIndexOutOfBounds(char[] t, Runnable thunk) {
        tryCatch(t, IndexOutOfBoundsException.class, thunk);
    }

    private static void tryCatch(Buffer b, Class<?> ex, Runnable thunk) {
        boolean caught = false;
        try {
            thunk.run();
        } catch (Throwable x) {
            if (ex.isAssignableFrom(x.getClass())) {
                caught = true;
            } else {
                fail(x.getMessage() + " not expected");
            }
        }
        if (!caught) {
            fail(ex.getName() + " not thrown", b);
        }
    }

    private static void tryCatch(char[] t, Class<?> ex, Runnable thunk) {
        tryCatch(CharBuffer.wrap(t), ex, thunk);
    }

    public static void test(int level, final CharBuffer b, boolean direct) {

        show(level, b);

        if (direct != b.isDirect())
            fail("Wrong direction", b);

        // Gets and puts

        relPut(b);
        relGet(b);
        absGet(b);
        bulkGet(b);

        absPut(b);
        relGet(b);
        absGet(b);
        bulkGet(b);

        bulkPutArray(b);
        relGet(b);

        bulkPutBuffer(b);
        relGet(b);


        bulkPutString(b);
        relGet(b);
        b.position(1);
        b.limit(7);
        ck(b, b.toString().equals("bcdefg"));

        // CharSequence ops

        b.position(2);
        ck(b, b.charAt(1), 'd');
        CharBuffer c = b.subSequence(1, 4);
        ck(c, c.capacity(), b.capacity());
        ck(c, c.position(), b.position()+1);
        ck(c, c.limit(), b.position()+4);
        ck(c, b.subSequence(1, 4).toString().equals("def"));

        // 4938424
        b.position(4);
        ck(b, b.charAt(1), 'f');
        ck(b, b.subSequence(1, 3).toString().equals("fg"));

        // String ops

        // 7190219
        b.clear();
        int pos = b.position();
        tryCatch(b, BufferOverflowException.class, () ->
                b.put(String.valueOf(new char[b.capacity() + 1]), 0, b.capacity() + 1)
            );
        ck(b, b.position(), pos);
        relGet(b);


        // Compact

        relPut(b);
        b.position(13);
        b.compact();
        b.flip();
        relGet(b, 13);

        // Exceptions

        relPut(b);
        b.limit(b.capacity() / 2);
        b.position(b.limit());

        tryCatch(b, BufferUnderflowException.class, () -> b.get());
        tryCatch(b, BufferOverflowException.class, () -> b.put((char)42));
        // The index must be non-negative and less than the buffer's limit.
        catchIndexOutOfBounds(b, () -> b.get(b.limit()));
        catchIndexOutOfBounds(b, () -> b.get(-1));
        catchIndexOutOfBounds(b, () -> b.put(b.limit(), (char)42));
        tryCatch(b, InvalidMarkException.class,
                () -> b.position(0).mark().compact().reset());

        try {
            b.position(b.limit() + 1);
            fail("IllegalArgumentException expected for position beyond limit");
        } catch (IllegalArgumentException e) {
            if (e.getMessage() == null) {
                fail("Non-null IllegalArgumentException message expected for"
                     + " position beyond limit");
            }
        }

        try {
            b.position(-1);
            fail("IllegalArgumentException expected for negative position");
        } catch (IllegalArgumentException e) {
            if (e.getMessage() == null) {
                fail("Non-null IllegalArgumentException message expected for"
                     + " negative position");
            }
        }

        try {
            b.limit(b.capacity() + 1);
            fail("IllegalArgumentException expected for limit beyond capacity");
        } catch (IllegalArgumentException e) {
            if (e.getMessage() == null) {
                fail("Non-null IllegalArgumentException message expected for"
                     + " limit beyond capacity");
            }
        }

        try {
            b.limit(-1);
            fail("IllegalArgumentException expected for negative limit");
        } catch (IllegalArgumentException e) {
            if (e.getMessage() == null) {
                fail("Non-null IllegalArgumentException message expected for"
                     + " negative limit");
            }
        }

        // Values

        b.clear();
        b.put((char)0);
        b.put((char)-1);
        b.put((char)1);
        b.put(Character.MAX_VALUE);
        b.put(Character.MIN_VALUE);


        b.flip();
        ck(b, b.get(), 0);
        ck(b, b.get(), (char)-1);
        ck(b, b.get(), 1);
        ck(b, b.get(), Character.MAX_VALUE);
        ck(b, b.get(), Character.MIN_VALUE);


        // Comparison
        b.rewind();
        CharBuffer b2 = CharBuffer.allocate(b.capacity());
        b2.put(b);
        b2.flip();
        b.position(2);
        b2.position(2);
        if (!b.equals(b2)) {
            for (int i = 2; i < b.limit(); i++) {
                char x = b.get(i);
                char y = b2.get(i);
                if (x != y


                    ) {
                    out.println("[" + i + "] " + x + " != " + y);
                }
            }
            fail("Identical buffers not equal", b, b2);
        }
        if (b.compareTo(b2) != 0) {
            fail("Comparison to identical buffer != 0", b, b2);
        }
        b.limit(b.limit() + 1);
        b.position(b.limit() - 1);
        b.put((char)99);
        b.rewind();
        b2.rewind();
        if (b.equals(b2))
            fail("Non-identical buffers equal", b, b2);
        if (b.compareTo(b2) <= 0)
            fail("Comparison to shorter buffer <= 0", b, b2);
        b.limit(b.limit() - 1);

        b.put(2, (char)42);
        if (b.equals(b2))
            fail("Non-identical buffers equal", b, b2);
        if (b.compareTo(b2) <= 0)
            fail("Comparison to lesser buffer <= 0", b, b2);

        // Check equals and compareTo with interesting values
        for (char x : VALUES) {
            CharBuffer xb = CharBuffer.wrap(new char[] { x });
            if (xb.compareTo(xb) != 0) {
                fail("compareTo not reflexive", xb, xb, x, x);
            }
            if (!xb.equals(xb)) {
                fail("equals not reflexive", xb, xb, x, x);
            }
            for (char y : VALUES) {
                CharBuffer yb = CharBuffer.wrap(new char[] { y });
                if (xb.compareTo(yb) != - yb.compareTo(xb)) {
                    fail("compareTo not anti-symmetric",
                         xb, yb, x, y);
                }
                if ((xb.compareTo(yb) == 0) != xb.equals(yb)) {
                    fail("compareTo inconsistent with equals",
                         xb, yb, x, y);
                }
                if (xb.compareTo(yb) != Character.compare(x, y)) {


                    fail("Incorrect results for CharBuffer.compareTo",
                         xb, yb, x, y);
                }
                if (xb.equals(yb) != ((x == y) || ((x != x) && (y != y)))) {
                    fail("Incorrect results for CharBuffer.equals",
                         xb, yb, x, y);
                }
            }
        }

        // Sub, dup

        relPut(b);
        relGet(b.duplicate());
        b.position(13);
        relGet(b.duplicate(), 13);
        relGet(b.duplicate().slice(), 13);
        relGet(b.slice(), 13);
        relGet(b.slice().duplicate(), 13);

        // Slice

        b.position(5);
        CharBuffer sb = b.slice();
        checkSlice(b, sb);
        b.position(0);
        CharBuffer sb2 = sb.slice();
        checkSlice(sb, sb2);

        if (!sb.equals(sb2))
            fail("Sliced slices do not match", sb, sb2);
        if ((sb.hasArray()) && (sb.arrayOffset() != sb2.arrayOffset())) {
            fail("Array offsets do not match: "
                 + sb.arrayOffset() + " != " + sb2.arrayOffset(), sb, sb2);
        }


        // Read-only views

        b.rewind();
        final CharBuffer rb = b.asReadOnlyBuffer();
        if (!b.equals(rb))
            fail("Buffer not equal to read-only view", b, rb);
        show(level + 1, rb);

        catchReadOnlyBuffer(b, () -> relPut(rb));
        catchReadOnlyBuffer(b, () -> absPut(rb));
        catchReadOnlyBuffer(b, () -> bulkPutArray(rb));
        catchReadOnlyBuffer(b, () -> bulkPutBuffer(rb));

        // put(CharBuffer) should not change source position
        final CharBuffer src = CharBuffer.allocate(1);
        catchReadOnlyBuffer(b, () -> rb.put(src));
        ck(src, src.position(), 0);

        catchReadOnlyBuffer(b, () -> rb.compact());


        // 7199551
        catchReadOnlyBuffer(b, () -> rb.put(new String(new char[rb.remaining() + 1])));
        catchReadOnlyBuffer(b, () -> rb.append(new String(new char[rb.remaining() + 1])));


        if (rb.getClass().getName().startsWith("java.nio.Heap")) {
            catchReadOnlyBuffer(b, () -> rb.array());
            catchReadOnlyBuffer(b, () -> rb.arrayOffset());
            if (rb.hasArray()) {
                fail("Read-only heap buffer's backing array is accessible", rb);
            }
        }

        // Bulk puts from read-only buffers

        b.clear();
        rb.rewind();
        b.put(rb);


        relPut(b);                       // Required by testViews


    }


    private static void testStr() {
        final String s = "abcdefghijklm";
        int start = 3;
        int end = 9;
        final CharBuffer b = CharBuffer.wrap(s, start, end);
        show(0, b);
        ck(b, b.toString().equals(s.substring(start, end)));
        ck(b, b.toString().equals("defghi"));
        ck(b, b.isReadOnly());
        catchReadOnlyBuffer(b, () -> b.put('x'));
        ck(b, start, b.position());
        ck(b, end, b.limit());
        ck(b, s.length(), b.capacity());
        b.position(6);
        ck(b, b.subSequence(0,3).toString().equals("ghi"));

        // The index, relative to the position, must be non-negative and
        // smaller than remaining().
        catchIndexOutOfBounds(b, () -> b.charAt(-1));
        catchIndexOutOfBounds(b, () -> b.charAt(b.remaining()));
        // The index must be non-negative and less than the buffer's limit.
        catchIndexOutOfBounds(b, () -> b.get(b.limit()));
        catchIndexOutOfBounds(b, () -> b.get(-1));
        // The start must be non-negative and no larger than remaining().
        catchIndexOutOfBounds(b, () -> b.subSequence(-1, b.remaining()));
        catchIndexOutOfBounds(b, () -> b.subSequence(b.remaining() + 1, b.remaining()));

        // The end must be no smaller than start and no larger than
        // remaining().
        catchIndexOutOfBounds(b, () -> b.subSequence(2, 1));
        catchIndexOutOfBounds(b, () -> b.subSequence(0, b.remaining() + 1));

        // The offset must be non-negative and no larger than <array.length>.
        catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, -1, s.length()));
        catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, s.length() + 1, s.length()));
        catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, 1, 0));
        catchIndexOutOfBounds(b, () -> CharBuffer.wrap(s, 0, s.length() + 1));
    }


    public static void test(final char [] ba) {
        int offset = 47;
        int length = 900;
        final CharBuffer b = CharBuffer.wrap(ba, offset, length);
        show(0, b);
        ck(b, b.capacity(), ba.length);
        ck(b, b.position(), offset);
        ck(b, b.limit(), offset + length);

        // The offset must be non-negative and no larger than <array.length>.
        catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, -1, ba.length));
        catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, ba.length + 1, ba.length));
        catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, 0, -1));
        catchIndexOutOfBounds(ba, () -> CharBuffer.wrap(ba, 0, ba.length + 1));

        // A NullPointerException will be thrown if the array is null.
        tryCatch(ba, NullPointerException.class,
                () -> CharBuffer.wrap((char []) null, 0, 5));
        tryCatch(ba, NullPointerException.class,
                () -> CharBuffer.wrap((char []) null));
    }

    private static void testAllocate() {
        // An IllegalArgumentException will be thrown for negative capacities.
        catchIllegalArgument((Buffer) null, () -> CharBuffer.allocate(-1));
        try {
            CharBuffer.allocate(-1);
        } catch (IllegalArgumentException e) {
            if (e.getMessage() == null) {
                fail("Non-null IllegalArgumentException message expected for"
                     + " attempt to allocate negative capacity buffer");
            }
        }


    }

    public static void test() {
        testAllocate();
        test(0, CharBuffer.allocate(7 * 1024), false);
        test(0, CharBuffer.wrap(new char[7 * 1024], 0, 7 * 1024), false);
        test(new char[1024]);


        testStr();


        callReset(CharBuffer.allocate(10));


        putBuffer();

    }

}