| /* |
| * Copyright (C) 2011 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 com.android.internal.util; |
| |
| import android.test.AndroidTestCase; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| |
| /** |
| * Tests for {@link ProcFileReader}. |
| */ |
| public class ProcFileReaderTest extends AndroidTestCase { |
| |
| public void testEmpty() throws Exception { |
| final ProcFileReader reader = buildReader(""); |
| |
| assertFalse(reader.hasMoreData()); |
| try { |
| reader.finishLine(); |
| fail("somehow finished line beyond end of stream?"); |
| } catch (IOException e) { |
| // expected |
| } |
| assertFalse(reader.hasMoreData()); |
| } |
| |
| public void testSingleString() throws Exception { |
| final ProcFileReader reader = buildReader("a\nb\nc\n"); |
| |
| assertEquals("a", reader.nextString()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| |
| assertEquals("b", reader.nextString()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| |
| assertEquals("c", reader.nextString()); |
| reader.finishLine(); |
| assertFalse(reader.hasMoreData()); |
| } |
| |
| public void testMixedNumbersSkip() throws Exception { |
| final ProcFileReader reader = buildReader("1 2 3\n4 abc_def 5 6 7 8 9\n10\n"); |
| |
| assertEquals(1, reader.nextInt()); |
| assertEquals(2, reader.nextInt()); |
| assertEquals(3, reader.nextInt()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| |
| assertEquals(4, reader.nextInt()); |
| assertEquals("abc_def", reader.nextString()); |
| assertEquals(5, reader.nextInt()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| |
| assertEquals(10, reader.nextInt()); |
| reader.finishLine(); |
| assertFalse(reader.hasMoreData()); |
| } |
| |
| public void testBufferSize() throws Exception { |
| // read numbers using very small buffer size, exercising fillBuf() |
| final ProcFileReader reader = buildReader("1 21 3 41 5 61 7 81 9 10\n", 3); |
| |
| assertEquals(1, reader.nextInt()); |
| assertEquals(21, reader.nextInt()); |
| assertEquals(3, reader.nextInt()); |
| assertEquals(41, reader.nextInt()); |
| assertEquals(5, reader.nextInt()); |
| assertEquals(61, reader.nextInt()); |
| assertEquals(7, reader.nextInt()); |
| assertEquals(81, reader.nextInt()); |
| assertEquals(9, reader.nextInt()); |
| assertEquals(10, reader.nextInt()); |
| reader.finishLine(); |
| assertFalse(reader.hasMoreData()); |
| } |
| |
| public void testBlankLines() throws Exception { |
| final ProcFileReader reader = buildReader("1\n\n2\n\n3\n"); |
| |
| assertEquals(1, reader.nextInt()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| |
| assertEquals(2, reader.nextInt()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| reader.finishLine(); |
| assertTrue(reader.hasMoreData()); |
| |
| assertEquals(3, reader.nextInt()); |
| reader.finishLine(); |
| assertFalse(reader.hasMoreData()); |
| } |
| |
| public void testMinMax() throws Exception { |
| final ProcFileReader reader = buildReader( |
| "1 -1024 9223372036854775807 -9223372036854775808\n"); |
| |
| assertEquals(1, reader.nextLong()); |
| assertEquals(-1024, reader.nextLong()); |
| assertEquals(Long.MAX_VALUE, reader.nextLong()); |
| assertEquals(Long.MIN_VALUE, reader.nextLong()); |
| reader.finishLine(); |
| assertFalse(reader.hasMoreData()); |
| } |
| |
| public void testDelimiterNeverFound() throws Exception { |
| final ProcFileReader reader = buildReader("teststringwithoutdelimiters"); |
| |
| try { |
| reader.nextString(); |
| fail("somehow read a string value?"); |
| } catch (IOException e) { |
| // expected |
| assertTrue(e.getMessage().contains("End of stream")); |
| } |
| } |
| |
| public void testLargerThanBuffer() throws Exception { |
| // try finishing line larger than buffer |
| final ProcFileReader reader = buildReader("1 teststringlongerthanbuffer\n", 4); |
| |
| assertEquals(1, reader.nextLong()); |
| try { |
| reader.finishLine(); |
| fail("somehow finished line?"); |
| } catch (IOException e) { |
| // expected |
| assertTrue(e.getMessage().contains("already-full buffer")); |
| } |
| } |
| |
| public void testOptionalLongs() throws Exception { |
| final ProcFileReader reader = buildReader("123 456\n789\n"); |
| |
| assertEquals(123L, reader.nextLong()); |
| assertEquals(456L, reader.nextOptionalLong(-1L)); |
| assertEquals(-1L, reader.nextOptionalLong(-1L)); |
| assertEquals(-1L, reader.nextOptionalLong(-1L)); |
| assertEquals(-1L, reader.nextOptionalLong(-1L)); |
| reader.finishLine(); |
| |
| assertEquals(789L, reader.nextOptionalLong(-1L)); |
| assertEquals(-1L, reader.nextOptionalLong(-1L)); |
| } |
| |
| private static ProcFileReader buildReader(String string) throws IOException { |
| return buildReader(string, 2048); |
| } |
| |
| private static ProcFileReader buildReader(String string, int bufferSize) throws IOException { |
| return new ProcFileReader( |
| new ByteArrayInputStream(string.getBytes(StandardCharsets.US_ASCII)), bufferSize); |
| } |
| } |