1 | /**************************************************************** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one * |
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3 | * or more contributor license agreements. See the NOTICE file * |
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4 | * distributed with this work for additional information * |
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5 | * regarding copyright ownership. The ASF licenses this file * |
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6 | * to you under the Apache License, Version 2.0 (the * |
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7 | * "License"); you may not use this file except in compliance * |
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8 | * with the License. You may obtain a copy of the License at * |
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9 | * * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 * |
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11 | * * |
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12 | * Unless required by applicable law or agreed to in writing, * |
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13 | * software distributed under the License is distributed on an * |
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14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
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15 | * KIND, either express or implied. See the License for the * |
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16 | * specific language governing permissions and limitations * |
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17 | * under the License. * |
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18 | ****************************************************************/ |
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19 | |
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20 | package org.apache.james.mime4j.io; |
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21 | |
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22 | import java.io.ByteArrayInputStream; |
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23 | import java.io.IOException; |
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24 | |
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25 | import org.apache.james.mime4j.io.LineNumberInputStream; |
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26 | |
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27 | import junit.framework.TestCase; |
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28 | |
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29 | public class LineNumberInputStreamTest extends TestCase { |
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30 | /** |
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31 | * Tests that reading single bytes updates the line number appropriately. |
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32 | */ |
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33 | public void testReadSingleByte() throws IOException { |
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34 | String s = "Yada\r\nyada\r\nyada\r\n"; |
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35 | LineNumberInputStream is = new LineNumberInputStream( |
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36 | new ByteArrayInputStream(s.getBytes())); |
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37 | |
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38 | for (int i = 0; i < 6; i++) { |
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39 | assertEquals(1, is.getLineNumber()); |
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40 | is.read(); |
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41 | } |
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42 | |
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43 | for (int i = 6; i < 12; i++) { |
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44 | assertEquals(2, is.getLineNumber()); |
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45 | is.read(); |
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46 | } |
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47 | |
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48 | for (int i = 12; i < 18; i++) { |
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49 | assertEquals(3, is.getLineNumber()); |
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50 | is.read(); |
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51 | } |
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52 | |
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53 | assertEquals(4, is.getLineNumber()); |
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54 | assertEquals(-1, is.read()); |
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55 | } |
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56 | |
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57 | /** |
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58 | * Tests that reading multiple bytes at once updates the line number |
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59 | * appropriately. |
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60 | */ |
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61 | public void testReadManyBytes() throws IOException { |
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62 | String s = "Yada\r\nyada\r\nyada\r\n"; |
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63 | LineNumberInputStream is = new LineNumberInputStream( |
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64 | new ByteArrayInputStream(s.getBytes())); |
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65 | |
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66 | byte[] buf = new byte[4]; |
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67 | assertEquals(1, is.getLineNumber()); |
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68 | is.read(buf); |
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69 | assertEquals(1, is.getLineNumber()); |
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70 | is.read(buf); |
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71 | assertEquals(2, is.getLineNumber()); |
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72 | is.read(buf); |
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73 | assertEquals(3, is.getLineNumber()); |
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74 | is.read(buf); |
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75 | assertEquals(3, is.getLineNumber()); |
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76 | is.read(buf); |
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77 | assertEquals(4, is.getLineNumber()); |
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78 | |
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79 | assertEquals(-1, is.read()); |
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80 | } |
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81 | } |
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