feat(interim): support multiple as a default preset method (#9737)

* Dialogs, Bottom-Sheets and Toasts have presets, which all depend on the `build` preset automatically.

* Due to the new `muliple` property in the `$$interimElement` factory, developers can explicitly pass the multiple property per JSON, but not as a preset method.

Author: devversion

src/core/services/interimElement/interimElement.js

@@ -53,7 +53,7 @@ function InterimElementProvider() {
      * all interim elements will come with the 'build' preset
      */
     provider.addPreset('build', {
-      methods: ['controller', 'controllerAs', 'resolve',
+      methods: ['controller', 'controllerAs', 'resolve', 'multiple',
         'template', 'templateUrl', 'themable', 'transformTemplate', 'parent', 'contentElement']
     });
 

src/core/services/interimElement/interimElement.spec.js

@@ -250,6 +250,53 @@ describe('$$interimElement service', function() {
       });
     });
 
+    it('should support multiple interims as a preset method', function() {
+
+      var showCount = 0;
+
+      createInterimProvider('interimTest');
+
+      inject(function(interimTest) {
+
+        showInterim(interimTest);
+        expect(showCount).toBe(1);
+
+        showInterim(interimTest);
+        expect(showCount).toBe(2);
+
+        interimTest.hide();
+        flush();
+
+        expect(showCount).toBe(1);
+
+        interimTest.hide();
+        flush();
+
+        expect(showCount).toBe(0);
+
+      });
+
+      function showInterim(service) {
+
+        var preset = service
+          .build()
+          .template('<div>Interim Element</div>')
+          .multiple(true);
+
+        preset._options.onShow = function() {
+          showCount++;
+        };
+
+        preset._options.onRemove = function() {
+          showCount--;
+        };
+
+        service.show(preset);
+        flush();
+      }
+
+    });
+
   });
 
   describe('a service', function() {