+package net.sf.openrocket.util;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class ExpressionParserTest {
+
+ private static final double EPS = 1e-10;
+
+ private ExpressionParser parser = new ExpressionParser();
+
+ @Test
+ public void testPlainNumber() throws InvalidExpressionException {
+ assertEquals(1.0, parser.parse("1"), EPS);
+ assertEquals(1.0, parser.parse("\t 1 "), EPS);
+ assertEquals(0.9, parser.parse(".9"), EPS);
+ assertEquals(1.0, parser.parse("1."), EPS);
+ assertEquals(1.2, parser.parse("1.2"), EPS);
+ assertEquals(1.2, parser.parse("01.200"), EPS);
+ }
+
+ @Test
+ public void testNegativeNumber() throws InvalidExpressionException {
+ assertEquals(-1.0, parser.parse("-1"), EPS);
+ assertEquals(-15.0, parser.parse("-15"), EPS);
+ assertEquals(-0.9, parser.parse("-.9"), EPS);
+ assertEquals(-1.0, parser.parse("-1."), EPS);
+ assertEquals(-1.2, parser.parse("-1.2"), EPS);
+ assertEquals(-1.2, parser.parse("-01.200"), EPS);
+ }
+
+
+ @Test
+ public void testDecimalComma() throws InvalidExpressionException {
+ assertEquals(1.0, parser.parse("1,"), EPS);
+ assertEquals(1.2, parser.parse("1,2"), EPS);
+ assertEquals(1.2, parser.parse("01,200"), EPS);
+ assertEquals(0.9, parser.parse(",9"), EPS);
+ }
+
+
+ @Test
+ public void testSimpleExpression() throws InvalidExpressionException {
+ assertEquals(3.0, parser.parse("1+2"), EPS);
+ assertEquals(6.0, parser.parse("1+2.5*2"), EPS);
+ assertEquals(7.0, parser.parse("(1+2.5) * 2"), EPS);
+ assertEquals(1.0 + 2.0 / 3.0, parser.parse("1+2/3"), EPS);
+ }
+
+ @Test
+ public void testFraction() throws InvalidExpressionException {
+ assertEquals(1.5, parser.parse("1 1/2"), EPS);
+ assertEquals(11 + 11.0 / 22.0, parser.parse("11 11/22"), EPS);
+ assertEquals(-11 - 11.0 / 22.0, parser.parse("-11 11/22"), EPS);
+ assertEquals(1.5, parser.parse(" 1 1 / 2"), EPS);
+ assertEquals(11 + 11.0 / 22.0, parser.parse(" 11 11 / 22"), EPS);
+ assertEquals(2.0 + 3.0 / 7.0, parser.parse("1 + 1 3/7"), EPS);
+ assertEquals(2.0 + 3.0 / 7.0, parser.parse("1 + 1 3/7"), EPS);
+ assertEquals(3.0, parser.parse("1 1/2* 2"), EPS);
+ assertEquals(3.0, parser.parse("1 1/2* 2"), EPS);
+ }
+
+ @Test
+ public void testCharConversion() throws InvalidExpressionException {
+ assertEquals(1 + 1.0 / 9.0, parser.parse("1 \u2081 \u2044 \u2089"), EPS);
+ }
+
+ @Test
+ public void testInvalidExpression() {
+ expectInvalid("1+");
+ expectInvalid("1+2/");
+ expectInvalid("1 2");
+ expectInvalid("12 2.5");
+ expectInvalid("1 2.5/4");
+ expectInvalid("11 22.55/44");
+ expectInvalid("1 2/4.1");
+ expectInvalid("11 22/44.11");
+ expectInvalid("1.2 3/4");
+ expectInvalid("12.23 34/45");
+
+ expectInvalid("1. 2");
+ expectInvalid("1 .2");
+ }
+
+ private void expectInvalid(String exp) {
+ try {
+ double value = parser.parse(exp);
+ fail("Expression '" + exp + "' evaluated to " + value + ", expected failure");
+ } catch (InvalidExpressionException e) {
+ // expected
+ }
+ }
+}