| /* |
| * Copyright (C) 2013 The Guava Authors |
| * |
| * 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.google.common.io; |
| |
| import java.io.IOException; |
| import java.nio.CharBuffer; |
| import junit.framework.TestCase; |
| |
| /** |
| * Tests for {@link CharSequenceReader}. |
| * |
| * @author Colin Decker |
| */ |
| public class CharSequenceReaderTest extends TestCase { |
| |
| public void testReadEmptyString() throws IOException { |
| assertReadsCorrectly(""); |
| } |
| |
| public void testReadsStringsCorrectly() throws IOException { |
| assertReadsCorrectly("abc"); |
| assertReadsCorrectly("abcde"); |
| assertReadsCorrectly("abcdefghijkl"); |
| assertReadsCorrectly( |
| "" |
| + "abcdefghijklmnopqrstuvwxyz\n" |
| + "ABCDEFGHIJKLMNOPQRSTUVWXYZ\r" |
| + "0123456789\r\n" |
| + "!@#$%^&*()-=_+\t[]{};':\",./<>?\\| "); |
| } |
| |
| public void testMarkAndReset() throws IOException { |
| String string = "abcdefghijklmnopqrstuvwxyz"; |
| CharSequenceReader reader = new CharSequenceReader(string); |
| assertTrue(reader.markSupported()); |
| |
| assertEquals(string, readFully(reader)); |
| assertFullyRead(reader); |
| |
| // reset and read again |
| reader.reset(); |
| assertEquals(string, readFully(reader)); |
| assertFullyRead(reader); |
| |
| // reset, skip, mark, then read the rest |
| reader.reset(); |
| assertEquals(5, reader.skip(5)); |
| reader.mark(Integer.MAX_VALUE); |
| assertEquals(string.substring(5), readFully(reader)); |
| assertFullyRead(reader); |
| |
| // reset to the mark and then read the rest |
| reader.reset(); |
| assertEquals(string.substring(5), readFully(reader)); |
| assertFullyRead(reader); |
| } |
| |
| public void testIllegalArguments() throws IOException { |
| CharSequenceReader reader = new CharSequenceReader("12345"); |
| |
| char[] buf = new char[10]; |
| try { |
| reader.read(buf, 0, 11); |
| fail(); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| |
| try { |
| reader.read(buf, 10, 1); |
| fail(); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| |
| try { |
| reader.read(buf, 11, 0); |
| fail(); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| |
| try { |
| reader.read(buf, -1, 5); |
| fail(); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| |
| try { |
| reader.read(buf, 5, -1); |
| fail(); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| |
| try { |
| reader.read(buf, 0, 11); |
| fail(); |
| } catch (IndexOutOfBoundsException expected) { |
| } |
| |
| try { |
| reader.skip(-1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| |
| try { |
| reader.mark(-1); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| } |
| |
| public void testMethodsThrowWhenClosed() throws IOException { |
| CharSequenceReader reader = new CharSequenceReader(""); |
| reader.close(); |
| |
| try { |
| reader.read(); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.read(new char[10]); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.read(new char[10], 0, 10); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.read(CharBuffer.allocate(10)); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.skip(10); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.ready(); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.mark(10); |
| fail(); |
| } catch (IOException expected) { |
| } |
| |
| try { |
| reader.reset(); |
| fail(); |
| } catch (IOException expected) { |
| } |
| } |
| |
| /** |
| * Creates a CharSequenceReader wrapping the given CharSequence and tests that the reader produces |
| * the same sequence when read using each type of read method it provides. |
| */ |
| private static void assertReadsCorrectly(CharSequence charSequence) throws IOException { |
| String expected = charSequence.toString(); |
| |
| // read char by char |
| CharSequenceReader reader = new CharSequenceReader(charSequence); |
| for (int i = 0; i < expected.length(); i++) { |
| assertEquals(expected.charAt(i), reader.read()); |
| } |
| assertFullyRead(reader); |
| |
| // read all to one array |
| reader = new CharSequenceReader(charSequence); |
| char[] buf = new char[expected.length()]; |
| assertEquals(expected.length() == 0 ? -1 : expected.length(), reader.read(buf)); |
| assertEquals(expected, new String(buf)); |
| assertFullyRead(reader); |
| |
| // read in chunks to fixed array |
| reader = new CharSequenceReader(charSequence); |
| buf = new char[5]; |
| StringBuilder builder = new StringBuilder(); |
| int read; |
| while ((read = reader.read(buf, 0, buf.length)) != -1) { |
| builder.append(buf, 0, read); |
| } |
| assertEquals(expected, builder.toString()); |
| assertFullyRead(reader); |
| |
| // read all to one CharBuffer |
| reader = new CharSequenceReader(charSequence); |
| CharBuffer buf2 = CharBuffer.allocate(expected.length()); |
| assertEquals(expected.length() == 0 ? -1 : expected.length(), reader.read(buf2)); |
| buf2.flip(); |
| assertEquals(expected, buf2.toString()); |
| assertFullyRead(reader); |
| |
| // read in chunks to fixed CharBuffer |
| reader = new CharSequenceReader(charSequence); |
| buf2 = CharBuffer.allocate(5); |
| builder = new StringBuilder(); |
| while (reader.read(buf2) != -1) { |
| buf2.flip(); |
| builder.append(buf2); |
| buf2.clear(); |
| } |
| assertEquals(expected, builder.toString()); |
| assertFullyRead(reader); |
| |
| // skip fully |
| reader = new CharSequenceReader(charSequence); |
| assertEquals(expected.length(), reader.skip(Long.MAX_VALUE)); |
| assertFullyRead(reader); |
| |
| // skip 5 and read the rest |
| if (expected.length() > 5) { |
| reader = new CharSequenceReader(charSequence); |
| assertEquals(5, reader.skip(5)); |
| |
| buf = new char[expected.length() - 5]; |
| assertEquals(buf.length, reader.read(buf, 0, buf.length)); |
| assertEquals(expected.substring(5), new String(buf)); |
| assertFullyRead(reader); |
| } |
| } |
| |
| private static void assertFullyRead(CharSequenceReader reader) throws IOException { |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read(new char[10], 0, 10)); |
| assertEquals(-1, reader.read(CharBuffer.allocate(10))); |
| assertEquals(0, reader.skip(10)); |
| } |
| |
| private static String readFully(CharSequenceReader reader) throws IOException { |
| StringBuilder builder = new StringBuilder(); |
| int read; |
| while ((read = reader.read()) != -1) { |
| builder.append((char) read); |
| } |
| return builder.toString(); |
| } |
| } |