[android] - replace low level json parsing

platform/android/MapboxGLAndroidSDKTestApp/src/androidTest/java/com/mapbox/mapboxsdk/testapp/offline/OfflineUtilsTest.java

@@ -0,0 +1,44 @@
+package com.mapbox.mapboxsdk.testapp.offline;
+
+import com.mapbox.mapboxsdk.testapp.activity.BaseActivityTest;
+import com.mapbox.mapboxsdk.testapp.activity.espresso.EspressoTestActivity;
+import com.mapbox.mapboxsdk.testapp.utils.OfflineUtils;
+
+import org.junit.Test;
+
+import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+
+import static com.mapbox.mapboxsdk.testapp.activity.offline.OfflineActivity.JSON_CHARSET;
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.TestCase.assertTrue;
+
+public class OfflineUtilsTest extends BaseActivityTest {
+
+  private static final String REGION_NAME = "hello world";
+  private static final String CONVERTED_REGION_NAME = "{\"FIELD_REGION_NAME\":\"hello world\"}";
+
+  @Override
+  protected Class getActivityClass() {
+    return EspressoTestActivity.class;
+  }
+
+  @Test
+  public void testOfflineUtilsConvertToBytes() throws UnsupportedEncodingException {
+    byte[] expected = CONVERTED_REGION_NAME.getBytes(JSON_CHARSET);
+    byte[] actual = OfflineUtils.convertRegionName(REGION_NAME);
+    assertTrue("Bytes arrays should match", Arrays.equals(expected, actual));
+  }
+
+  @Test
+  public void testOfflineUtilsConvertToString() throws UnsupportedEncodingException {
+    String actual = OfflineUtils.convertRegionName(CONVERTED_REGION_NAME.getBytes(JSON_CHARSET));
+    assertEquals("Strings should match", REGION_NAME, actual);
+  }
+
+  @Test
+  public void testOfflineUtilsConvertNoOp() {
+    String convertNoOp = OfflineUtils.convertRegionName(OfflineUtils.convertRegionName(REGION_NAME));
+    assertEquals("Strings should match", REGION_NAME, convertNoOp);
+  }
+}