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- /*
- * Copyright (C) 2021, Thomas Wolf <thomas.wolf@paranor.ch> and others
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Distribution License v. 1.0 which is available at
- * https://www.eclipse.org/org/documents/edl-v10.php.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
- package org.eclipse.jgit.util;
-
- import static org.junit.Assert.assertArrayEquals;
- import static org.junit.Assert.assertEquals;
-
- import java.io.ByteArrayInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.nio.charset.StandardCharsets;
- import java.util.Arrays;
-
- import org.junit.Test;
-
- public class IOTest {
-
- private static final byte[] DATA = "abcdefghijklmnopqrstuvwxyz"
- .getBytes(StandardCharsets.US_ASCII);
-
- private byte[] initBuffer(int size) {
- byte[] buffer = new byte[size];
- for (int i = 0; i < size; i++) {
- buffer[i] = (byte) ('0' + (i % 10));
- }
- return buffer;
- }
-
- private int read(byte[] buffer, int from) throws IOException {
- try (InputStream in = new ByteArrayInputStream(DATA)) {
- return IO.readFully(in, buffer, from);
- }
- }
-
- @Test
- public void readFullyBufferShorter() throws Exception {
- byte[] buffer = initBuffer(9);
- int length = read(buffer, 0);
- assertEquals(buffer.length, length);
- assertArrayEquals(buffer, Arrays.copyOfRange(DATA, 0, length));
- }
-
- @Test
- public void readFullyBufferLonger() throws Exception {
- byte[] buffer = initBuffer(50);
- byte[] initial = Arrays.copyOf(buffer, buffer.length);
- int length = read(buffer, 0);
- assertEquals(DATA.length, length);
- assertArrayEquals(Arrays.copyOfRange(buffer, 0, length), DATA);
- assertArrayEquals(Arrays.copyOfRange(buffer, length, buffer.length),
- Arrays.copyOfRange(initial, length, initial.length));
- }
-
- @Test
- public void readFullyBufferShorterOffset() throws Exception {
- byte[] buffer = initBuffer(9);
- byte[] initial = Arrays.copyOf(buffer, buffer.length);
- int length = read(buffer, 6);
- assertEquals(3, length);
- assertArrayEquals(Arrays.copyOfRange(buffer, 0, 6),
- Arrays.copyOfRange(initial, 0, 6));
- assertArrayEquals(Arrays.copyOfRange(buffer, 6, buffer.length),
- Arrays.copyOfRange(DATA, 0, 3));
- }
-
- @Test
- public void readFullyBufferLongerOffset() throws Exception {
- byte[] buffer = initBuffer(50);
- byte[] initial = Arrays.copyOf(buffer, buffer.length);
- int length = read(buffer, 40);
- assertEquals(10, length);
- assertArrayEquals(Arrays.copyOfRange(buffer, 0, 40),
- Arrays.copyOfRange(initial, 0, 40));
- assertArrayEquals(Arrays.copyOfRange(buffer, 40, buffer.length),
- Arrays.copyOfRange(DATA, 0, 10));
- }
- }
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