| /* |
| * Copyright 2018 Google Inc. |
| * |
| * 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.gwt.emultest.java.io; |
| |
| import com.google.gwt.junit.client.GWTTestCase; |
| |
| import java.io.StringReader; |
| import java.util.Arrays; |
| |
| /** |
| * Unit test for the {@link java.io.StringReader} emulated class. |
| */ |
| public class StringReaderTest extends GWTTestCase { |
| @Override |
| public String getModuleName() { |
| return "com.google.gwt.emultest.EmulSuite"; |
| } |
| |
| public void testEmptyString() throws Exception { |
| StringReader reader = new StringReader(""); |
| assertEquals(-1, reader.read()); |
| char[] buf = new char[5]; |
| assertEquals(-1, reader.read(buf)); |
| assertEquals(-1, reader.read(buf, 2, 0)); |
| } |
| |
| public void testString() throws Exception { |
| StringReader reader = new StringReader("The q\u00DCuick brown fox jumped over the lazy dog"); |
| assertEquals('T', reader.read()); |
| |
| char[] buf = new char[10]; |
| assertEquals(6, reader.read(buf, 3, 6)); |
| assertEquals("\u0000\u0000\u0000he q\u00DCi\u0000", String.valueOf(buf)); |
| |
| assertEquals('k', reader.read()); |
| assertEquals(' ', reader.read()); |
| |
| assertEquals(2, reader.read(buf, 0, 2)); |
| // First 2 characters now filled. |
| assertEquals("br\u0000he q\u00DCi\u0000", String.valueOf(buf)); |
| |
| assertEquals(10, reader.read(buf)); |
| assertEquals("own fox ju", String.valueOf(buf)); |
| |
| char[] four = new char[4]; |
| assertEquals(4, reader.read(four)); |
| assertEquals("mped", String.valueOf(four)); |
| |
| char[] emptyBuf = new char[0]; |
| assertEquals(0, reader.read(emptyBuf)); |
| |
| assertEquals(10, reader.read(buf)); |
| assertEquals(" over the ", String.valueOf(buf)); |
| |
| char[] eight = new char[8]; |
| assertEquals(7, reader.read(eight)); |
| assertEquals("lazy dog\u0000", String.valueOf(eight)); |
| |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read(eight)); |
| assertEquals(-1, reader.read(eight, 0, 0)); |
| assertEquals(-1, reader.read(eight, 0, 1)); |
| } |
| |
| public void testSkip_stringOverBufferSize() throws Exception { |
| StringReader reader = new StringReader(repeat('x', 1025)); |
| |
| assertEquals(1025, reader.skip(2000)); |
| |
| assertEquals(-1, reader.read()); |
| } |
| |
| public void testSkip_longString() throws Exception { |
| int n = 10000; |
| char[] arr = new char[n]; |
| for (char i = 0; i < n; i++) { |
| arr[i] = i; |
| } |
| |
| StringReader reader = new StringReader(String.valueOf(arr)); |
| assertEquals(5000, reader.skip(5000)); |
| assertEquals(5000, reader.read()); |
| assertEquals(5001, reader.read()); |
| |
| assertEquals(4000, reader.skip(4000)); |
| assertEquals(9002, reader.read()); |
| |
| assertEquals(997, reader.skip(4000)); |
| assertEquals(-1, reader.read()); |
| } |
| |
| private static String repeat(char c, int count) { |
| char[] arr = new char[count]; |
| Arrays.fill(arr, c); |
| return String.valueOf(arr); |
| } |
| } |