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added Niall's patch for improved double constructor test 

added test for construction failure (golden-ratio)
JIRA: MATH-179

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@614320 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Luc Maisonobe 2008-01-22 20:58:20 +00:00
parent db70272e68
commit 09e2f3940c
1 changed files with 58 additions and 1 deletions
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59
src/test/org/apache/commons/math/fraction/FractionTest.java
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@ -63,7 +63,64 @@ public class FractionTest extends TestCase {
fail(ex.getMessage());
}
}
public void testGoldenRatio() {
try {
// the golden ratio is notoriously a difficult number for continuous fraction
new Fraction((1 + Math.sqrt(5)) / 2, 1.0e-12, 25);
fail("an exception should have been thrown");
} catch (ConvergenceException ce) {
// expected behavior
} catch (Exception e) {
fail("wrong exception caught");
}
}
// MATH-179
public void testDoubleConstructor() throws ConvergenceException {
assertFraction(1, 2, new Fraction((double)1 / (double)2));
assertFraction(1, 3, new Fraction((double)1 / (double)3));
assertFraction(2, 3, new Fraction((double)2 / (double)3));
assertFraction(1, 4, new Fraction((double)1 / (double)4));
assertFraction(3, 4, new Fraction((double)3 / (double)4));
assertFraction(1, 5, new Fraction((double)1 / (double)5));
assertFraction(2, 5, new Fraction((double)2 / (double)5));
assertFraction(3, 5, new Fraction((double)3 / (double)5));
assertFraction(4, 5, new Fraction((double)4 / (double)5));
assertFraction(1, 6, new Fraction((double)1 / (double)6));
assertFraction(5, 6, new Fraction((double)5 / (double)6));
assertFraction(1, 7, new Fraction((double)1 / (double)7));
assertFraction(2, 7, new Fraction((double)2 / (double)7));
assertFraction(3, 7, new Fraction((double)3 / (double)7));
assertFraction(4, 7, new Fraction((double)4 / (double)7));
assertFraction(5, 7, new Fraction((double)5 / (double)7));
assertFraction(6, 7, new Fraction((double)6 / (double)7));
assertFraction(1, 8, new Fraction((double)1 / (double)8));
assertFraction(3, 8, new Fraction((double)3 / (double)8));
assertFraction(5, 8, new Fraction((double)5 / (double)8));
assertFraction(7, 8, new Fraction((double)7 / (double)8));
assertFraction(1, 9, new Fraction((double)1 / (double)9));
assertFraction(2, 9, new Fraction((double)2 / (double)9));
assertFraction(4, 9, new Fraction((double)4 / (double)9));
assertFraction(5, 9, new Fraction((double)5 / (double)9));
assertFraction(7, 9, new Fraction((double)7 / (double)9));
assertFraction(8, 9, new Fraction((double)8 / (double)9));
assertFraction(1, 10, new Fraction((double)1 / (double)10));
assertFraction(3, 10, new Fraction((double)3 / (double)10));
assertFraction(7, 10, new Fraction((double)7 / (double)10));
assertFraction(9, 10, new Fraction((double)9 / (double)10));
assertFraction(1, 11, new Fraction((double)1 / (double)11));
assertFraction(2, 11, new Fraction((double)2 / (double)11));
assertFraction(3, 11, new Fraction((double)3 / (double)11));
assertFraction(4, 11, new Fraction((double)4 / (double)11));
assertFraction(5, 11, new Fraction((double)5 / (double)11));
assertFraction(6, 11, new Fraction((double)6 / (double)11));
assertFraction(7, 11, new Fraction((double)7 / (double)11));
assertFraction(8, 11, new Fraction((double)8 / (double)11));
assertFraction(9, 11, new Fraction((double)9 / (double)11));
assertFraction(10, 11, new Fraction((double)10 / (double)11));
}
public void testCompareTo() {
Fraction first = new Fraction(1, 2);
Fraction second = new Fraction(1, 3);