1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server.wifi.hotspot2.anqp; 18 19 import java.io.ByteArrayOutputStream; 20 import java.io.IOException; 21 import java.nio.charset.StandardCharsets; 22 23 /** 24 * Utility class containing test data and object for {@link IconInfo}. 25 */ 26 public class IconInfoTestUtil { 27 // Test data 28 private static final int TEST_WIDTH = 9811; 29 private static final int TEST_HEIGHT = 4523; 30 private static final String TEST_LANGUAGE = "en"; 31 private static final String TEST_TYPE = "png"; 32 private static final String TEST_FILENAME = "testicon.png"; 33 34 /** 35 * {@link IconInfo} object with pre-defined test data. 36 */ 37 public static final IconInfo TEST_ICON_INFO = 38 new IconInfo(TEST_WIDTH, TEST_HEIGHT, TEST_LANGUAGE, TEST_TYPE, TEST_FILENAME); 39 40 /** 41 * Raw bytes of icon info with pre-defined test data. 42 */ 43 public static final byte[] TEST_ICON_INFO_RAW_BYTES = getTestData(); 44 45 /** 46 * Generate raw bytes based on the pre-defined test data. 47 * 48 * @return array of bytes 49 */ 50 private static byte[] getTestData() { 51 try { 52 ByteArrayOutputStream out = new ByteArrayOutputStream(); 53 writeShortLE(out, TEST_WIDTH); 54 writeShortLE(out, TEST_HEIGHT); 55 out.write(TEST_LANGUAGE.getBytes(StandardCharsets.US_ASCII)); 56 out.write((byte) 0); // Padding for language code. 57 writeByteArrayWithLength(out, TEST_TYPE.getBytes(StandardCharsets.US_ASCII)); 58 writeByteArrayWithLength(out, TEST_FILENAME.getBytes(StandardCharsets.UTF_8)); 59 return out.toByteArray(); 60 } catch (IOException e) { 61 return null; 62 } 63 } 64 65 /** 66 * Write the lower 2-bytes of an integer to the given output stream in Little-Endian. 67 * 68 * @param out The output stream to write to 69 * @param value The integer value to write 70 */ 71 private static void writeShortLE(ByteArrayOutputStream out, int value) { 72 out.write(value & 0xFF); 73 out.write((value >> 8) & 0xFF); 74 } 75 76 /** 77 * Write the given byte array to the given output stream, the array data is prefixed with a 78 * byte specifying the length of the byte array. 79 * 80 * @param out The output stream to write to 81 * @param data The byte array to write 82 * @throws IOException 83 */ 84 private static void writeByteArrayWithLength(ByteArrayOutputStream out, byte[] data) 85 throws IOException { 86 out.write((byte) data.length); 87 out.write(data); 88 } 89 } 90
