Use transfer acceleration

// FREEBIE

src/test/java/org/whispersystems/textsecuregcm/tests/util/UrlSignerTest.java

@@ -0,0 +1,30 @@
+package org.whispersystems.textsecuregcm.tests.util;
+
+import com.amazonaws.HttpMethod;
+import org.junit.Test;
+import org.whispersystems.textsecuregcm.configuration.S3Configuration;
+import org.whispersystems.textsecuregcm.util.UrlSigner;
+
+import java.net.URL;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class UrlSignerTest {
+
+  @Test
+  public void testTransferAcceleration() {
+    S3Configuration configuration = mock(S3Configuration.class);
+    when(configuration.getAccessKey()).thenReturn("foo");
+    when(configuration.getAccessSecret()).thenReturn("bar");
+    when(configuration.getAttachmentsBucket()).thenReturn("attachments-test");
+
+    UrlSigner signer = new UrlSigner(configuration);
+    URL url = signer.getPreSignedUrl(1234, HttpMethod.GET);
+
+    System.out.println("The URL: " + url);
+    assertThat(url).hasHost("attachments-test.s3-accelerate.amazonaws.com");
+  }
+
+}