1 package net.sf.openrocket.util;
3 import static org.junit.Assert.*;
7 public class ExpressionParserTest {
9 private static final double EPS = 1e-10;
11 private ExpressionParser parser = new ExpressionParser();
14 public void testPlainNumber() throws InvalidExpressionException {
15 assertEquals(1.0, parser.parse("1"), EPS);
16 assertEquals(1.0, parser.parse("\t 1 "), EPS);
17 assertEquals(0.9, parser.parse(".9"), EPS);
18 assertEquals(1.0, parser.parse("1."), EPS);
19 assertEquals(1.2, parser.parse("1.2"), EPS);
20 assertEquals(1.2, parser.parse("01.200"), EPS);
24 public void testNegativeNumber() throws InvalidExpressionException {
25 assertEquals(-1.0, parser.parse("-1"), EPS);
26 assertEquals(-15.0, parser.parse("-15"), EPS);
27 assertEquals(-0.9, parser.parse("-.9"), EPS);
28 assertEquals(-1.0, parser.parse("-1."), EPS);
29 assertEquals(-1.2, parser.parse("-1.2"), EPS);
30 assertEquals(-1.2, parser.parse("-01.200"), EPS);
35 public void testDecimalComma() throws InvalidExpressionException {
36 assertEquals(1.0, parser.parse("1,"), EPS);
37 assertEquals(1.2, parser.parse("1,2"), EPS);
38 assertEquals(1.2, parser.parse("01,200"), EPS);
39 assertEquals(0.9, parser.parse(",9"), EPS);
44 public void testSimpleExpression() throws InvalidExpressionException {
45 assertEquals(3.0, parser.parse("1+2"), EPS);
46 assertEquals(6.0, parser.parse("1+2.5*2"), EPS);
47 assertEquals(7.0, parser.parse("(1+2.5) * 2"), EPS);
48 assertEquals(1.0 + 2.0 / 3.0, parser.parse("1+2/3"), EPS);
52 public void testFraction() throws InvalidExpressionException {
53 assertEquals(1.5, parser.parse("1 1/2"), EPS);
54 assertEquals(11 + 11.0 / 22.0, parser.parse("11 11/22"), EPS);
55 assertEquals(-11 - 11.0 / 22.0, parser.parse("-11 11/22"), EPS);
56 assertEquals(1.5, parser.parse(" 1 1 / 2"), EPS);
57 assertEquals(11 + 11.0 / 22.0, parser.parse(" 11 11 / 22"), EPS);
58 assertEquals(2.0 + 3.0 / 7.0, parser.parse("1 + 1 3/7"), EPS);
59 assertEquals(2.0 + 3.0 / 7.0, parser.parse("1 + 1 3/7"), EPS);
60 assertEquals(3.0, parser.parse("1 1/2* 2"), EPS);
61 assertEquals(3.0, parser.parse("1 1/2* 2"), EPS);
65 public void testCharConversion() throws InvalidExpressionException {
66 assertEquals(1 + 1.0 / 9.0, parser.parse("1 \u2081 \u2044 \u2089"), EPS);
70 public void testInvalidExpression() {
72 expectInvalid("1+2/");
74 expectInvalid("12 2.5");
75 expectInvalid("1 2.5/4");
76 expectInvalid("11 22.55/44");
77 expectInvalid("1 2/4.1");
78 expectInvalid("11 22/44.11");
79 expectInvalid("1.2 3/4");
80 expectInvalid("12.23 34/45");
82 expectInvalid("1. 2");
83 expectInvalid("1 .2");
86 private void expectInvalid(String exp) {
88 double value = parser.parse(exp);
89 fail("Expression '" + exp + "' evaluated to " + value + ", expected failure");
90 } catch (InvalidExpressionException e) {