Add support for format in Responsive breakpoints transformation. (#78)

Author: nitzanj

cloudinary-core/src/main/java/com/cloudinary/ResponsiveBreakpoint.java

@@ -2,6 +2,8 @@
 
 import org.cloudinary.json.JSONObject;
 
+import java.util.Collections;
+
 public class ResponsiveBreakpoint extends JSONObject {
     public ResponsiveBreakpoint() {
         put("create_derived", true);
@@ -21,7 +23,7 @@ public Transformation transformation() {
     }
 
     public ResponsiveBreakpoint transformation(Transformation transformation) {
-        put("transformation", transformation);
+        put("transformation", Util.buildEager(Collections.singletonList(transformation)));
         return this;
     }
 

cloudinary-test-common/src/main/java/com/cloudinary/test/AbstractUploaderTest.java

@@ -462,7 +462,7 @@ public void testFilenameOption() throws Exception {
 
     @Test
     public void testResponsiveBreakpoints() throws Exception {
-        ResponsiveBreakpoint breakpoint = new ResponsiveBreakpoint().maxImages(2).createDerived(false);
+        ResponsiveBreakpoint breakpoint = new ResponsiveBreakpoint().maxImages(2).createDerived(false).transformation(new EagerTransformation().format("gif").effect("sepia"));
 
         // A single breakpoint
         Map result = cloudinary.uploader().upload(SRC_TEST_IMAGE, asMap("responsive_breakpoints",
@@ -471,6 +471,7 @@ public void testResponsiveBreakpoints() throws Exception {
         java.util.ArrayList breakpointsResponse = (java.util.ArrayList) result.get("responsive_breakpoints");
         java.util.ArrayList breakpoints = (java.util.ArrayList) ((Map) breakpointsResponse.get(0)).get("breakpoints");
         assertEquals(2, breakpoints.size());
+        assertTrue(((Map)breakpoints.get(0)).get("url").toString().endsWith("gif"));
 
         // an array of breakpoints
         result = cloudinary.uploader().upload(SRC_TEST_IMAGE, asMap("responsive_breakpoints",