fix: rename BoxFile.getPreviewLink to BoxFile.getExpiringEmbedLink

BREAKING CHANGE: Any calls to BoxFile.getPreviewLink will need to be updated to
BoxFile.getExpiringEmbedLink.

Closes #1

Author: Drew Parker

src/classes/BoxFile.cls

@@ -44,7 +44,7 @@ public class BoxFile extends BoxItem {
     private static String GET_VERSIONS_URL = 'files/{0}/versions';
     private static String FILE_TRASH_URL = 'files/{0}/trash';
     private static string ADD_COMMENT_URL = 'comments';
-    private static string PREVIEW_LINK_URL = '/files/{0}?fields=expiring_embed_link';
+    private static string EXPIRING_EMBED_LINK_URL = '/files/{0}?fields=expiring_embed_link';
 
     /**
      * Constructs a BoxFile for a file with a given ID.
@@ -174,10 +174,13 @@ public class BoxFile extends BoxItem {
      *
      * @return preview link url, this link can be used in an embedded iframe to provide a rendering of the file.
      */
-    public String getPreviewLink() {
+    public String getExpiringEmbedLink() {
         String url =
             this.api.baseUrl +
-            String.format(PREVIEW_LINK_URL, new List<String>{ this.getId() });
+            String.format(
+                EXPIRING_EMBED_LINK_URL,
+                new List<String>{ this.getId() }
+            );
         BoxApiRequest request = new BoxApiRequest(
             this.api,
             url,
@@ -190,7 +193,7 @@ public class BoxFile extends BoxItem {
         HttpResponse response = request.send();
         String responseBody = BoxApiRequest.getBoxResourceResponseBody(
             response,
-            'BoxFile.getPreviewLink'
+            'BoxFile.getExpiringEmbedLink'
         );
 
         BoxGenericJsonObject responseObject = new BoxGenericJsonObject(

src/classes/BoxFileTests.cls

@@ -246,7 +246,7 @@ public class BoxFileTests {
         System.assertEquals('tigers.jpeg', fileInfo.getValue('name'));
     }
 
-    public static testMethod void testGetPreviewLink() {
+    public static testMethod void testGetExpiringEmbedLink() {
         String mockResponseBody = '{"type": "file", "id": "34122832467", "etag": "1", "expiring_embed_link": {"url": "https://app.box.com/preview/expiring_embed/gvoct6FE!Qz2rDey"}}';
         Test.setMock(
             HttpCalloutMock.class,
@@ -257,12 +257,12 @@ public class BoxFileTests {
         BoxFile file = new BoxFile(api, '5000948880');
 
         Test.startTest();
-        String previewLink = file.getPreviewLink();
+        String expiringEmbedLink = file.getExpiringEmbedLink();
         Test.stopTest();
 
         System.assertEquals(
             'https://app.box.com/preview/expiring_embed/gvoct6FE!Qz2rDey',
-            previewLink
+            expiringEmbedLink
         );
     }