Test: import+export results in same timezone.

Part of #1296.

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.1'
+        classpath 'com.android.tools.build:gradle:7.3.0-beta04'
     }
 }
 

src/androidTest/java/de/dennisguse/opentracks/io/file/importer/GPXTrackImporterTest.java

@@ -15,11 +15,16 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.time.Instant;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import de.dennisguse.opentracks.content.data.TestDataUtil;
 import de.dennisguse.opentracks.data.ContentProviderUtils;
@@ -27,6 +32,8 @@ import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.models.TrackPoint;
+import de.dennisguse.opentracks.io.file.TrackFileFormat;
+import de.dennisguse.opentracks.io.file.exporter.TrackExporter;
 import de.dennisguse.opentracks.stats.TrackStatistics;
 
 /**
@@ -208,4 +215,31 @@ public class GPXTrackImporterTest {
                         .setSpeed(Speed.of(3))
         ), importedTrackPoints);
     }
+
+    @LargeTest
+    @Test
+    public void importExportTest_timezone() throws IOException {
+        // given
+        XMLImporter importer = new XMLImporter(new GpxTrackImporter(context, trackImporter));
+        InputStream inputStream = InstrumentationRegistry.getInstrumentation().getContext().getResources().openRawResource(de.dennisguse.opentracks.debug.test.R.raw.gpx_timezone);
+        InputStream inputStreamExpected = InstrumentationRegistry.getInstrumentation().getContext().getResources().openRawResource(de.dennisguse.opentracks.debug.test.R.raw.gpx_timezone);
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+        // when
+        // 1. import
+        importTrackId = importer.importFile(inputStream).get(0);
+        Track importedTrack = contentProviderUtils.getTrack(importTrackId);
+
+        TrackExporter trackExporter = TrackFileFormat.GPX.createTrackExporter(context);
+        trackExporter.writeTrack(importedTrack, outputStream);
+
+        // then
+        String expected = new BufferedReader(
+                new InputStreamReader(inputStreamExpected, StandardCharsets.UTF_8))
+                .lines()
+                .collect(Collectors.joining("\n")) + "\n";
+
+        assertEquals(expected, outputStream.toString()); //TODO inputStream.readAllBytes() ?
+    }
 }

src/androidTest/res/raw/gpx_timezone.gpx

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx
+version="1.1"
+creator="OpenTracks (Debug)"
+xmlns="http://www.topografix.com/GPX/1/1"
+xmlns:topografix="http://www.topografix.com/GPX/Private/TopoGrafix/0/1"
+xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+xmlns:opentracks="http://opentracksapp.com/xmlschemas/v1"
+xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v2"
+xmlns:gpxtrkx="http://www.garmin.com/xmlschemas/TrackStatsExtension/v1"
+xmlns:cluetrust="http://www.cluetrust.com/Schemas/"
+xmlns:pwr="http://www.garmin.com/xmlschemas/PowerExtension/v1"
+xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.topografix.com/GPX/Private/TopoGrafix/0/1 http://www.topografix.com/GPX/Private/TopoGrafix/0/1/topografix.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v2 https://www8.garmin.com/xmlschemas/TrackPointExtensionv2.xsd http://www.garmin.com/xmlschemas/PowerExtension/v1 https://www8.garmin.com/xmlschemas/PowerExtensionv1.xsd http://www.garmin.com/xmlschemas/TrackStatsExtension/v1 http://www.cluetrust.com/Schemas http://www.cluetrust.com/Schemas/gpxdata10.xsd http://opentracksapp.com/xmlschemas/v1 http://opentracksapp.com/xmlschemas/OpenTracks_v1.xsd">
+<wpt lat="3" lon="14">
+<ele>10</ele>
+<time>2021-01-07T21:51:59.179+01:15</time>
+<name><![CDATA[Marker 1]]></name>
+<desc><![CDATA[Marker 1 desc]]></desc>
+<type><![CDATA[Marker 1 category]]></type>
+</wpt>
+<trk>
+<name><![CDATA[2021-01-07 22:51]]></name>
+<desc><![CDATA[the description]]></desc>
+<type><![CDATA[the category]]></type>
+<extensions>
+<topografix:color>c0c0c0</topografix:color>
+<opentracks:trackid>7002101e-4198-4613-8c24-544e01ca3981</opentracks:trackid>
+<gpxtrkx:TrackStatsExtension>
+<gpxtrkx:Distance>0.0</gpxtrkx:Distance>
+<gpxtrkx:TimerTime>0</gpxtrkx:TimerTime>
+<gpxtrkx:MovingTime>0</gpxtrkx:MovingTime>
+<gpxtrkx:StoppedTime>0</gpxtrkx:StoppedTime>
+<gpxtrkx:MaxSpeed>0.0</gpxtrkx:MaxSpeed>
+<gpxtrkx:Ascent>null</gpxtrkx:Ascent>
+<gpxtrkx:Descent>null</gpxtrkx:Descent>
+</gpxtrkx:TrackStatsExtension>
+</extensions>
+<trkseg>
+<trkpt lat="3" lon="14">
+<ele>10</ele>
+<time>2021-01-07T21:51:59.179+01:15</time>
+</trkpt>
+</trkseg>
+</trk>
+</gpx>