| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.content.pm; |
| |
| import android.test.AndroidTestCase; |
| |
| import androidx.test.filters.MediumTest; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| |
| public class LimitedLengthInputStreamTest extends AndroidTestCase { |
| private final byte[] TEST_STRING1 = "This is a test".getBytes(); |
| |
| private InputStream mTestStream1; |
| |
| @Override |
| protected void setUp() throws Exception { |
| super.setUp(); |
| |
| mTestStream1 = new ByteArrayInputStream(TEST_STRING1); |
| } |
| |
| @MediumTest |
| public void testConstructor_NegativeOffset_Failure() throws Exception { |
| try { |
| InputStream is = new LimitedLengthInputStream(mTestStream1, -1, TEST_STRING1.length); |
| fail("Should throw IOException on negative index"); |
| } catch (IOException e) { |
| // success |
| } |
| } |
| |
| @MediumTest |
| public void testConstructor_NegativeLength_Failure() throws Exception { |
| try { |
| InputStream is = new LimitedLengthInputStream(mTestStream1, 0, -1); |
| fail("Should throw IOException on negative length"); |
| } catch (IOException e) { |
| // success |
| } |
| } |
| |
| @MediumTest |
| public void testConstructor_NullInputStream_Failure() throws Exception { |
| try { |
| InputStream is = new LimitedLengthInputStream(null, 0, 1); |
| fail("Should throw IOException on null input stream"); |
| } catch (IOException e) { |
| // success |
| } |
| } |
| |
| @MediumTest |
| public void testConstructor_OffsetLengthOverflow_Fail() throws Exception { |
| try { |
| InputStream is = new LimitedLengthInputStream(mTestStream1, Long.MAX_VALUE - 1, |
| Long.MAX_VALUE - 1); |
| fail("Should fail when offset + length is > Long.MAX_VALUE"); |
| } catch (IOException e) { |
| // success |
| } |
| } |
| |
| private void checkReadBytesWithOffsetAndLength_WithString1(int offset, int length) |
| throws Exception { |
| byte[] temp = new byte[TEST_STRING1.length]; |
| byte[] expected = new byte[length]; |
| byte[] actual = new byte[length]; |
| |
| System.arraycopy(TEST_STRING1, offset, expected, 0, length); |
| |
| InputStream is = new LimitedLengthInputStream(mTestStream1, offset, length); |
| assertEquals(length, is.read(temp, 0, temp.length)); |
| |
| System.arraycopy(temp, 0, actual, 0, length); |
| assertTrue(Arrays.equals(expected, actual)); |
| |
| assertEquals(-1, is.read(temp, 0, temp.length)); |
| } |
| |
| @MediumTest |
| public void testReadBytesWithOffsetAndLength_ZeroOffset_PartialLength_Success() |
| throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(0, 2); |
| } |
| |
| @MediumTest |
| public void testReadBytesWithOffsetAndLength_NonZeroOffset_PartialLength_Success() |
| throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(3, 2); |
| } |
| |
| @MediumTest |
| public void testReadBytesWithOffsetAndLength_ZeroOffset_FullLength_Success() throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(0, TEST_STRING1.length); |
| } |
| |
| @MediumTest |
| public void testReadBytesWithOffsetAndLength_NonZeroOffset_FullLength_Success() |
| throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(3, TEST_STRING1.length - 3); |
| } |
| |
| @MediumTest |
| public void testReadBytesWithOffsetAndLength_ZeroOffset_PastEnd_Success() throws Exception { |
| byte[] temp = new byte[TEST_STRING1.length + 10]; |
| InputStream is = new LimitedLengthInputStream(mTestStream1, 0, TEST_STRING1.length + 10); |
| assertEquals(TEST_STRING1.length, is.read(temp, 0, TEST_STRING1.length + 10)); |
| |
| byte[] actual = new byte[TEST_STRING1.length]; |
| System.arraycopy(temp, 0, actual, 0, actual.length); |
| assertTrue(Arrays.equals(TEST_STRING1, actual)); |
| } |
| |
| private void checkReadBytes_WithString1(int offset, int length) throws Exception { |
| byte[] temp = new byte[TEST_STRING1.length]; |
| byte[] expected = new byte[length]; |
| byte[] actual = new byte[length]; |
| |
| System.arraycopy(TEST_STRING1, offset, expected, 0, length); |
| |
| InputStream is = new LimitedLengthInputStream(mTestStream1, offset, length); |
| assertEquals(length, is.read(temp)); |
| |
| System.arraycopy(temp, 0, actual, 0, length); |
| assertTrue(Arrays.equals(expected, actual)); |
| |
| assertEquals(-1, is.read(temp)); |
| } |
| |
| @MediumTest |
| public void testReadBytes_ZeroOffset_PartialLength_Success() throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(0, 2); |
| } |
| |
| @MediumTest |
| public void testReadBytes_NonZeroOffset_PartialLength_Success() throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(3, 2); |
| } |
| |
| @MediumTest |
| public void testReadBytes_ZeroOffset_FullLength_Success() throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(0, TEST_STRING1.length); |
| } |
| |
| @MediumTest |
| public void testReadBytes_NonZeroOffset_FullLength_Success() throws Exception { |
| checkReadBytesWithOffsetAndLength_WithString1(3, TEST_STRING1.length - 3); |
| } |
| |
| private void checkSingleByteRead_WithString1(int offset, int length) throws Exception { |
| InputStream is = new LimitedLengthInputStream(mTestStream1, offset, length); |
| |
| for (int i = 0; i < length; i++) { |
| assertEquals(TEST_STRING1[offset + i], is.read()); |
| } |
| |
| assertEquals(-1, is.read()); |
| } |
| |
| @MediumTest |
| public void testSingleByteRead_ZeroOffset_PartialLength_Success() throws Exception { |
| checkSingleByteRead_WithString1(0, 2); |
| } |
| |
| @MediumTest |
| public void testSingleByteRead_NonZeroOffset_PartialLength_Success() throws Exception { |
| checkSingleByteRead_WithString1(3, 2); |
| } |
| |
| @MediumTest |
| public void testSingleByteRead_ZeroOffset_FullLength_Success() throws Exception { |
| checkSingleByteRead_WithString1(0, TEST_STRING1.length); |
| } |
| |
| @MediumTest |
| public void testSingleByteRead_NonZeroOffset_FullLength_Success() throws Exception { |
| checkSingleByteRead_WithString1(3, TEST_STRING1.length - 3); |
| } |
| } |