/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.common.math;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class DoubleOperationsTest {
private DoubleOperations ops = new DoubleOperations();
@Test
public void shouldReturnProperExponenentInScientificNotation() {
assertEquals(-3, ops.getExponentInScientificNotation(0.0010d));
assertEquals(-3, ops.getExponentInScientificNotation(0.0020d));
assertEquals(-3, ops.getExponentInScientificNotation(0.009999d));
assertEquals(-2, ops.getExponentInScientificNotation(0.010d));
assertEquals(-2, ops.getExponentInScientificNotation(0.020d));
assertEquals(-2, ops.getExponentInScientificNotation(0.09999d));
assertEquals(-1, ops.getExponentInScientificNotation(0.10d));
assertEquals(-1, ops.getExponentInScientificNotation(0.20d));
assertEquals(-1, ops.getExponentInScientificNotation(0.9999d));
assertEquals(0, ops.getExponentInScientificNotation(0.0d));
assertEquals(0, ops.getExponentInScientificNotation(1.0d));
assertEquals(0, ops.getExponentInScientificNotation(2.0d));
assertEquals(0, ops.getExponentInScientificNotation(9.999d));
assertEquals(1, ops.getExponentInScientificNotation(10.0d));
assertEquals(1, ops.getExponentInScientificNotation(20.0d));
assertEquals(1, ops.getExponentInScientificNotation(99.999d));
assertEquals(2, ops.getExponentInScientificNotation(100.0d));
assertEquals(2, ops.getExponentInScientificNotation(200.0d));
assertEquals(2, ops.getExponentInScientificNotation(999.999d));
assertEquals(3, ops.getExponentInScientificNotation(1000.0d));
assertEquals(3, ops.getExponentInScientificNotation(2000.0d));
assertEquals(3, ops.getExponentInScientificNotation(9999.999d));
}
@Test
public void shouldRoundNumbersGreaterThan10() {
assertEquals(101.0d, ops.roundUp(101.2523d, 0), 0.01d);
assertEquals(101.0d, ops.roundUp(101.2323d, 0), 0.01d);
assertEquals(101.3d, ops.roundUp(101.2523d, 1), 0.01d);
assertEquals(101.2d, ops.roundUp(101.2323d, 1), 0.01d);
assertEquals(110.0d, ops.roundUp(109.2323d, -1), 1d);
assertEquals(100.0d, ops.roundUp(101.2323d, -1), 1d);
}
@Test
public void shouldKeepSignificantFigures() {
assertEquals(12.012d, ops.keepSignificantFigures(12.0123456, 5), 0.0001d);
assertEquals(12.013d, ops.keepSignificantFigures(12.0125456, 5), 0.0001d);
assertEquals(12.01d, ops.keepSignificantFigures(12.0123456, 4), 0.0001d);
assertEquals(12.0d, ops.keepSignificantFigures(12.0123456, 3), 0.0001d);
assertEquals(12.0d, ops.keepSignificantFigures(12.0123456, 2), 0.0001d);
assertEquals(10.0d, ops.keepSignificantFigures(12.0123456, 1), 0.0001d);
assertEquals(1300.0d, ops.keepSignificantFigures(1320.0d, 2), 0.001d);
}
}