1 package net.sf.openrocket.util;
3 import static java.lang.Math.PI;
4 import static org.junit.Assert.assertEquals;
5 import static org.junit.Assert.assertArrayEquals;
7 import java.nio.charset.Charset;
8 import java.util.Random;
10 import org.junit.Test;
12 public class TextUtilTest {
15 public void testConvertStringToBytes() {
17 Charset us_ascii = Charset.forName("US-ASCII");
19 byte[] ZIP_SIGNATURE_CORRECT = "PK".getBytes(us_ascii);
20 byte[] ZIP_SIGNATURE_TEST = TextUtil.convertStringToBytes( "PK", us_ascii);
22 assertArrayEquals( ZIP_SIGNATURE_CORRECT, ZIP_SIGNATURE_TEST );
24 byte[] OPENROCKET_SIGNATURE_CORRECT = "<openrocket".getBytes(us_ascii);
25 byte[] OPENROCKET_SIGNATURE_TEST = TextUtil.convertStringToBytes( "<openrocket", us_ascii);
27 assertArrayEquals( OPENROCKET_SIGNATURE_CORRECT, OPENROCKET_SIGNATURE_TEST);
29 byte[] ROCKSIM_SIGNATURE_CORRECT = "<RockSimDoc".getBytes(us_ascii);
30 byte[] ROCKSIM_SIGNATURE_TEST = TextUtil.convertStringToBytes( "<RockSimDoc", us_ascii);
32 assertArrayEquals( ROCKSIM_SIGNATURE_CORRECT, ROCKSIM_SIGNATURE_TEST );
36 public void testHexString() {
37 assertEquals("", TextUtil.hexString(new byte[0]));
38 assertEquals("00", TextUtil.hexString(new byte[] { 0x00 }));
39 assertEquals("ff", TextUtil.hexString(new byte[] { (byte) 0xff }));
41 for (int i = 0; i <= 0xff; i++) {
42 assertEquals(String.format("%02x", i), TextUtil.hexString(new byte[] { (byte) i }));
45 assertEquals("0f1e2d3c4b5a6978", TextUtil.hexString(new byte[] {
46 0x0f, 0x1e, 0x2d, 0x3c, 0x4b, 0x5a, 0x69, 0x78
49 Random rnd = new Random();
50 for (int count = 0; count < 10; count++) {
51 int n = rnd.nextInt(100);
52 byte[] bytes = new byte[n];
54 StringBuilder sb = new StringBuilder();
55 for (byte b : bytes) {
56 sb.append(String.format("%02x", b & 0xFF));
58 assertEquals(sb.toString(), TextUtil.hexString(bytes));
63 public void specialCaseTest() {
64 assertEquals("NaN", TextUtil.doubleToString(Double.NaN));
65 assertEquals("Inf", TextUtil.doubleToString(Double.POSITIVE_INFINITY));
66 assertEquals("-Inf", TextUtil.doubleToString(Double.NEGATIVE_INFINITY));
67 assertEquals("0", TextUtil.doubleToString(0.0));
68 assertEquals("0", TextUtil.doubleToString(MathUtil.EPSILON / 3));
69 assertEquals("0", TextUtil.doubleToString(-MathUtil.EPSILON / 3));
73 public void longTest() {
75 assertEquals("3.1416e-5", TextUtil.doubleToString(PI * 1e-5));
76 assertEquals("3.1416e-4", TextUtil.doubleToString(PI * 1e-4));
77 assertEquals("0.0031416", TextUtil.doubleToString(PI * 1e-3));
78 assertEquals("0.031416", TextUtil.doubleToString(PI * 1e-2));
79 assertEquals("0.31416", TextUtil.doubleToString(PI * 1e-1));
80 assertEquals("3.1416", TextUtil.doubleToString(PI));
81 assertEquals("31.416", TextUtil.doubleToString(PI * 1e1));
82 assertEquals("314.16", TextUtil.doubleToString(PI * 1e2));
83 assertEquals("3141.6", TextUtil.doubleToString(PI * 1e3));
84 assertEquals("31416", TextUtil.doubleToString(PI * 1e4));
85 assertEquals("314159", TextUtil.doubleToString(PI * 1e5));
86 assertEquals("3141593", TextUtil.doubleToString(PI * 1e6));
87 assertEquals("31415927", TextUtil.doubleToString(PI * 1e7));
88 assertEquals("3.1416e8", TextUtil.doubleToString(PI * 1e8));
89 assertEquals("3.1416e9", TextUtil.doubleToString(PI * 1e9));
90 assertEquals("3.1416e10", TextUtil.doubleToString(PI * 1e10));
92 assertEquals("-3.1416e-5", TextUtil.doubleToString(-PI * 1e-5));
93 assertEquals("-3.1416e-4", TextUtil.doubleToString(-PI * 1e-4));
94 assertEquals("-0.0031416", TextUtil.doubleToString(-PI * 1e-3));
95 assertEquals("-0.031416", TextUtil.doubleToString(-PI * 1e-2));
96 assertEquals("-0.31416", TextUtil.doubleToString(-PI * 1e-1));
97 assertEquals("-3.1416", TextUtil.doubleToString(-PI));
98 assertEquals("-31.416", TextUtil.doubleToString(-PI * 1e1));
99 assertEquals("-314.16", TextUtil.doubleToString(-PI * 1e2));
100 assertEquals("-3141.6", TextUtil.doubleToString(-PI * 1e3));
101 assertEquals("-31416", TextUtil.doubleToString(-PI * 1e4));
102 assertEquals("-314159", TextUtil.doubleToString(-PI * 1e5));
103 assertEquals("-3141593", TextUtil.doubleToString(-PI * 1e6));
104 assertEquals("-31415927", TextUtil.doubleToString(-PI * 1e7));
105 assertEquals("-3.1416e8", TextUtil.doubleToString(-PI * 1e8));
106 assertEquals("-3.1416e9", TextUtil.doubleToString(-PI * 1e9));
107 assertEquals("-3.1416e10", TextUtil.doubleToString(-PI * 1e10));
112 public void shortTest() {
114 assertEquals("3.1e-5", TextUtil.doubleToString(p * 1e-5));
115 assertEquals("3.1e-4", TextUtil.doubleToString(p * 1e-4));
116 assertEquals("0.0031", TextUtil.doubleToString(p * 1e-3));
117 assertEquals("0.031", TextUtil.doubleToString(p * 1e-2));
118 assertEquals("0.31", TextUtil.doubleToString(p * 1e-1));
119 assertEquals("3.1", TextUtil.doubleToString(p));
120 assertEquals("31", TextUtil.doubleToString(p * 1e1));
121 assertEquals("310", TextUtil.doubleToString(p * 1e2));
122 assertEquals("3100", TextUtil.doubleToString(p * 1e3));
123 assertEquals("31000", TextUtil.doubleToString(p * 1e4));
124 assertEquals("3.1e5", TextUtil.doubleToString(p * 1e5));
125 assertEquals("3.1e6", TextUtil.doubleToString(p * 1e6));
126 assertEquals("3.1e7", TextUtil.doubleToString(p * 1e7));
127 assertEquals("3.1e8", TextUtil.doubleToString(p * 1e8));
128 assertEquals("3.1e9", TextUtil.doubleToString(p * 1e9));
129 assertEquals("3.1e10", TextUtil.doubleToString(p * 1e10));
131 assertEquals("-3.1e-5", TextUtil.doubleToString(-p * 1e-5));
132 assertEquals("-3.1e-4", TextUtil.doubleToString(-p * 1e-4));
133 assertEquals("-0.0031", TextUtil.doubleToString(-p * 1e-3));
134 assertEquals("-0.031", TextUtil.doubleToString(-p * 1e-2));
135 assertEquals("-0.31", TextUtil.doubleToString(-p * 1e-1));
136 assertEquals("-3.1", TextUtil.doubleToString(-p));
137 assertEquals("-31", TextUtil.doubleToString(-p * 1e1));
138 assertEquals("-310", TextUtil.doubleToString(-p * 1e2));
139 assertEquals("-3100", TextUtil.doubleToString(-p * 1e3));
140 assertEquals("-31000", TextUtil.doubleToString(-p * 1e4));
141 assertEquals("-3.1e5", TextUtil.doubleToString(-p * 1e5));
142 assertEquals("-3.1e6", TextUtil.doubleToString(-p * 1e6));
143 assertEquals("-3.1e7", TextUtil.doubleToString(-p * 1e7));
144 assertEquals("-3.1e8", TextUtil.doubleToString(-p * 1e8));
145 assertEquals("-3.1e9", TextUtil.doubleToString(-p * 1e9));
146 assertEquals("-3.1e10", TextUtil.doubleToString(-p * 1e10));
149 assertEquals("3e-5", TextUtil.doubleToString(p * 1e-5));
150 assertEquals("3e-4", TextUtil.doubleToString(p * 1e-4));
151 assertEquals("3e-3", TextUtil.doubleToString(p * 1e-3));
152 assertEquals("0.03", TextUtil.doubleToString(p * 1e-2));
153 assertEquals("0.3", TextUtil.doubleToString(p * 1e-1));
154 assertEquals("3", TextUtil.doubleToString(p));
155 assertEquals("30", TextUtil.doubleToString(p * 1e1));
156 assertEquals("300", TextUtil.doubleToString(p * 1e2));
157 assertEquals("3e3", TextUtil.doubleToString(p * 1e3));
158 assertEquals("3e4", TextUtil.doubleToString(p * 1e4));
159 assertEquals("3e5", TextUtil.doubleToString(p * 1e5));
160 assertEquals("3e6", TextUtil.doubleToString(p * 1e6));
161 assertEquals("3e7", TextUtil.doubleToString(p * 1e7));
162 assertEquals("3e8", TextUtil.doubleToString(p * 1e8));
163 assertEquals("3e9", TextUtil.doubleToString(p * 1e9));
164 assertEquals("3e10", TextUtil.doubleToString(p * 1e10));
166 assertEquals("-3e-5", TextUtil.doubleToString(-p * 1e-5));
167 assertEquals("-3e-4", TextUtil.doubleToString(-p * 1e-4));
168 assertEquals("-3e-3", TextUtil.doubleToString(-p * 1e-3));
169 assertEquals("-0.03", TextUtil.doubleToString(-p * 1e-2));
170 assertEquals("-0.3", TextUtil.doubleToString(-p * 1e-1));
171 assertEquals("-3", TextUtil.doubleToString(-p));
172 assertEquals("-30", TextUtil.doubleToString(-p * 1e1));
173 assertEquals("-300", TextUtil.doubleToString(-p * 1e2));
174 assertEquals("-3e3", TextUtil.doubleToString(-p * 1e3));
175 assertEquals("-3e4", TextUtil.doubleToString(-p * 1e4));
176 assertEquals("-3e5", TextUtil.doubleToString(-p * 1e5));
177 assertEquals("-3e6", TextUtil.doubleToString(-p * 1e6));
178 assertEquals("-3e7", TextUtil.doubleToString(-p * 1e7));
179 assertEquals("-3e8", TextUtil.doubleToString(-p * 1e8));
180 assertEquals("-3e9", TextUtil.doubleToString(-p * 1e9));
181 assertEquals("-3e10", TextUtil.doubleToString(-p * 1e10));
186 public void roundingTest() {
188 assertEquals("1.001", TextUtil.doubleToString(1.00096));
192 * Not testing with 1.00015 because it might be changed during number formatting
193 * calculations. Its rounding is basically arbitrary anyway.
196 assertEquals("1.0002e-5", TextUtil.doubleToString(1.0001500001e-5));
197 assertEquals("1.0001e-5", TextUtil.doubleToString(1.0001499999e-5));
198 assertEquals("1.0002e-4", TextUtil.doubleToString(1.0001500001e-4));
199 assertEquals("1.0001e-4", TextUtil.doubleToString(1.0001499999e-4));
200 assertEquals("0.0010002", TextUtil.doubleToString(1.0001500001e-3));
201 assertEquals("0.0010001", TextUtil.doubleToString(1.0001499999e-3));
202 assertEquals("0.010002", TextUtil.doubleToString(1.0001500001e-2));
203 assertEquals("0.010001", TextUtil.doubleToString(1.0001499999e-2));
204 assertEquals("0.10002", TextUtil.doubleToString(1.0001500001e-1));
205 assertEquals("0.10001", TextUtil.doubleToString(1.0001499999e-1));
206 assertEquals("1.0002", TextUtil.doubleToString(1.0001500001));
207 assertEquals("1.0001", TextUtil.doubleToString(1.0001499999));
208 assertEquals("10.002", TextUtil.doubleToString(1.0001500001e1));
209 assertEquals("10.001", TextUtil.doubleToString(1.0001499999e1));
210 assertEquals("100.02", TextUtil.doubleToString(1.0001500001e2));
211 assertEquals("100.01", TextUtil.doubleToString(1.0001499999e2));
212 assertEquals("1000.2", TextUtil.doubleToString(1.0001500001e3));
213 assertEquals("1000.1", TextUtil.doubleToString(1.0001499999e3));
214 assertEquals("10002", TextUtil.doubleToString(1.0001500001e4));
215 assertEquals("10001", TextUtil.doubleToString(1.0001499999e4));
216 assertEquals("100012", TextUtil.doubleToString(1.00011500001e5));
217 assertEquals("100011", TextUtil.doubleToString(1.00011499999e5));
218 assertEquals("1000112", TextUtil.doubleToString(1.000111500001e6));
219 assertEquals("1000111", TextUtil.doubleToString(1.000111499999e6));
220 assertEquals("10001112", TextUtil.doubleToString(1.0001111500001e7));
221 assertEquals("10001111", TextUtil.doubleToString(1.0001111499999e7));
222 assertEquals("1.0002e8", TextUtil.doubleToString(1.0001500001e8));
223 assertEquals("1.0001e8", TextUtil.doubleToString(1.0001499999e8));
224 assertEquals("1.0002e9", TextUtil.doubleToString(1.0001500001e9));
225 assertEquals("1.0001e9", TextUtil.doubleToString(1.0001499999e9));
226 assertEquals("1.0002e10", TextUtil.doubleToString(1.0001500001e10));
227 assertEquals("1.0001e10", TextUtil.doubleToString(1.0001499999e10));
230 assertEquals("-1.0002e-5", TextUtil.doubleToString(-1.0001500001e-5));
231 assertEquals("-1.0001e-5", TextUtil.doubleToString(-1.0001499999e-5));
232 assertEquals("-1.0002e-4", TextUtil.doubleToString(-1.0001500001e-4));
233 assertEquals("-1.0001e-4", TextUtil.doubleToString(-1.0001499999e-4));
234 assertEquals("-0.0010002", TextUtil.doubleToString(-1.0001500001e-3));
235 assertEquals("-0.0010001", TextUtil.doubleToString(-1.0001499999e-3));
236 assertEquals("-0.010002", TextUtil.doubleToString(-1.0001500001e-2));
237 assertEquals("-0.010001", TextUtil.doubleToString(-1.0001499999e-2));
238 assertEquals("-0.10002", TextUtil.doubleToString(-1.0001500001e-1));
239 assertEquals("-0.10001", TextUtil.doubleToString(-1.0001499999e-1));
240 assertEquals("-1.0002", TextUtil.doubleToString(-1.0001500001));
241 assertEquals("-1.0001", TextUtil.doubleToString(-1.0001499999));
242 assertEquals("-10.002", TextUtil.doubleToString(-1.0001500001e1));
243 assertEquals("-10.001", TextUtil.doubleToString(-1.0001499999e1));
244 assertEquals("-100.02", TextUtil.doubleToString(-1.0001500001e2));
245 assertEquals("-100.01", TextUtil.doubleToString(-1.0001499999e2));
246 assertEquals("-1000.2", TextUtil.doubleToString(-1.0001500001e3));
247 assertEquals("-1000.1", TextUtil.doubleToString(-1.0001499999e3));
248 assertEquals("-10002", TextUtil.doubleToString(-1.0001500001e4));
249 assertEquals("-10001", TextUtil.doubleToString(-1.0001499999e4));
250 assertEquals("-100012", TextUtil.doubleToString(-1.00011500001e5));
251 assertEquals("-100011", TextUtil.doubleToString(-1.00011499999e5));
252 assertEquals("-1000112", TextUtil.doubleToString(-1.000111500001e6));
253 assertEquals("-1000111", TextUtil.doubleToString(-1.000111499999e6));
254 assertEquals("-10001112", TextUtil.doubleToString(-1.0001111500001e7));
255 assertEquals("-10001111", TextUtil.doubleToString(-1.0001111499999e7));
256 assertEquals("-1.0002e8", TextUtil.doubleToString(-1.0001500001e8));
257 assertEquals("-1.0001e8", TextUtil.doubleToString(-1.0001499999e8));
258 assertEquals("-1.0002e9", TextUtil.doubleToString(-1.0001500001e9));
259 assertEquals("-1.0001e9", TextUtil.doubleToString(-1.0001499999e9));
260 assertEquals("-1.0002e10", TextUtil.doubleToString(-1.0001500001e10));
261 assertEquals("-1.0001e10", TextUtil.doubleToString(-1.0001499999e10));
267 public void randomTest() {
268 for (int i = 0; i < 10000; i++) {
269 double orig = Math.random();
271 double expected = Math.rint(orig * 100000) / 100000.0;
275 String s = TextUtil.doubleToString(orig);
276 result = Double.parseDouble(s);
277 assertEquals(expected, result, 0.00000001);