PolylineEncodingTest.java

/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 *
 * 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 com.google.maps.internal;

import static com.google.maps.model.LatLngAssert.assertEquals;
import static org.junit.Assert.assertEquals;

import com.google.maps.SmallTests;
import com.google.maps.model.LatLng;

import org.junit.Test;
import org.junit.experimental.categories.Category;

import java.util.List;

/**
 * Test case for {@link PolylineEncoding}.
 */
@Category(SmallTests.class)
public class PolylineEncodingTest {

  private static final double EPSILON = .00001;
  private static final LatLng SYDNEY = new LatLng(-33.86746, 151.207090);
  private static final LatLng MELBOURNE = new LatLng(-37.814130, 144.963180);
  private static final String SYD_MELB_ROUTE =
      "rvumEis{y[`NsfA~tAbF`bEj^h{@{KlfA~eA~`AbmEghAt~D|e@jlRpO~yH_\\v}LjbBh~FdvCxu@`nCplDbcBf_B|w"
      + "BhIfhCnqEb~D~jCn_EngApdEtoBbfClf@t_CzcCpoEr_Gz_DxmAphDjjBxqCviEf}B|pEvsEzbE~qGfpExjBlqCx}"
      + "BvmLb`FbrQdpEvkAbjDllD|uDldDj`Ef|AzcEx_Gtm@vuI~xArwD`dArlFnhEzmHjtC~eDluAfkC|eAdhGpJh}N_m"
      + "ArrDlr@h|HzjDbsAvy@~~EdTxpJje@jlEltBboDjJdvKyZpzExrAxpHfg@pmJg[tgJuqBnlIarAh}DbN`hCeOf_Ib"
      + "xA~uFt|A|xEt_ArmBcN|sB|h@b_DjOzbJ{RlxCcfAp~AahAbqG~Gr}AerA`dCwlCbaFo]twKt{@bsG|}A~fDlvBvz"
      + "@tw@rpD_r@rqB{PvbHek@vsHlh@ptNtm@fkD[~xFeEbyKnjDdyDbbBtuA|~Br|Gx_AfxCt}CjnHv`Ew\\lnBdrBfq"
      + "BraD|{BldBxpG|]jqC`mArcBv]rdAxgBzdEb{InaBzyC}AzaEaIvrCzcAzsCtfD~qGoPfeEh]h`BxiB`e@`kBxfAv"
      + "^pyA`}BhkCdoCtrC~bCxhCbgEplKrk@tiAteBwAxbCwuAnnCc]b{FjrDdjGhhGzfCrlDruBzSrnGhvDhcFzw@n{@z"
      + "xAf}Fd{IzaDnbDjoAjqJjfDlbIlzAraBxrB}K~`GpuD~`BjmDhkBp{@r_AxCrnAjrCx`AzrBj{B|r@~qBbdAjtDnv"
      + "CtNzpHxeApyC|GlfM`fHtMvqLjuEtlDvoFbnCt|@xmAvqBkGreFm~@hlHw|AltC}NtkGvhBfaJ|~@riAxuC~gErwC"
      + "ttCzjAdmGuF`iFv`AxsJftD|nDr_QtbMz_DheAf~Buy@rlC`i@d_CljC`gBr|H|nAf_Fh{G|mE~kAhgKviEpaQnu@"
      + "zwAlrA`G~gFnvItz@j{Cng@j{D{]`tEftCdcIsPz{DddE~}PlnE|dJnzG`eG`mF|aJdqDvoAwWjzHv`H`wOtjGzeX"
      + "hhBlxErfCf{BtsCjpEjtD|}Aja@xnAbdDt|ErMrdFh{CzgAnlCnr@`wEM~mE`bA`uD|MlwKxmBvuFlhB|sN`_@fvB"
      + "p`CxhCt_@loDsS|eDlmChgFlqCbjCxk@vbGxmCjbMba@rpBaoClcCk_DhgEzYdzBl\\vsA_JfGztAbShkGtEhlDzh"
      + "C~w@hnB{e@yF}`D`_Ayx@~vGqn@l}CafC";


  @Test
  public void testPolylineEncodingRoundTrip() throws Exception {
    List<LatLng> points = PolylineEncoding.decode(SYD_MELB_ROUTE);
    String encodedPath = PolylineEncoding.encode(points);
    assertEquals(SYD_MELB_ROUTE, encodedPath);

  }

  @Test
  public void testDecode() throws Exception {
    List<LatLng> points = PolylineEncoding.decode(SYD_MELB_ROUTE);
    LatLng sydney = points.get(0);
    LatLng melbourne = points.get(points.size() - 1);

    assertEquals(SYDNEY, sydney, EPSILON);
    assertEquals(MELBOURNE, melbourne, EPSILON);
  }
}