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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.commons.geometry.euclidean.twod;
    18
    19  import org.apache.commons.geometry.core.precision.DoublePrecisionContext;
    20  import org.apache.commons.geometry.core.precision.EpsilonDoublePrecisionContext;
    21  import org.apache.commons.geometry.euclidean.EuclideanTestUtils;
    22  import org.apache.commons.geometry.euclidean.oned.Vector1D;
    23  import org.junit.Test;
    24
    25  public class LineSubsetTest {
    26
    27      private static final double TEST_EPS = 1e-10;
    28
    29      private static final DoublePrecisionContext TEST_PRECISION =
    30              new EpsilonDoublePrecisionContext(TEST_EPS);
    31
    32      @Test
    33      public void testToSubspaceAndToSpace() {
    34          // arrange
    35          final LineSubset subset = Lines.fromPointAndAngle(Vector2D.of(0, 1), 0.0, TEST_PRECISION)
    36                  .span();
    37
    38          // act/assert
    39          EuclideanTestUtils.assertCoordinatesEqual(Vector2D.of(2, 1), subset.toSpace(Vector1D.of(2)), TEST_EPS);
    40          EuclideanTestUtils.assertCoordinatesEqual(Vector1D.of(2), subset.toSubspace(Vector2D.of(2, 1)), TEST_EPS);
    41      }
    42  }