[TC] Improve the coverage of the Scrollview widget

[Issue] N/A
[Problem] Scrollview coverage is low
[Solution] Add new test cases

Signed-off-by: Hunseop Jeong <hs85.jeong@samsung.com>

tests/js/profile/wearable/widget/wearable/Scrollview/Scrollview.js

@@ -44,6 +44,74 @@
 			helpers.restoreStub(ns.support.shape, "circle");
 		});
 
+		QUnit.test("_init", 4, function (assert) {
+			var element = document.getElementById("scrollview-page-w"),
+				scrollview = new Scrollview();
+
+			helpers.stub(scrollview, "_setBouncingEffect", function () {
+				assert.ok(true, "_setBouncingEffect should be called");
+			});
+
+			scrollview.element = element;
+			scrollview._init();
+
+			assert.equal(scrollview.maxScrollX, 0, "maxScrollX is 0");
+			assert.equal(scrollview.maxScrollY, 0, "maxScrollY is 0");
+			assert.notEqual(scrollview.bouncingEffect, undefined, "bouncing effect is created");
+
+			helpers.restoreStub(scrollview, "_setBouncingEffect");
+		});
+
+		QUnit.test("_start & _end", 6, function (assert) {
+			var element = document.getElementById("scrollview-page-w"),
+				scrollview = new Scrollview();
+
+			helpers.stub(scrollview, "_setBouncingEffect", function () {
+				assert.ok(true, "_setBouncingEffect should be called");
+			});
+
+			scrollview.element = element;
+			scrollview._build(element);
+			scrollview._init();
+
+			scrollview._start();
+
+			assert.equal(scrollview.scrolled, false, "scrolled is false");
+			assert.equal(scrollview.dragging, true, "dragging is true");
+			assert.equal(scrollview.scrollCanceled, false, "scrollCanceled is false");
+
+			helpers.stub(scrollview.bouncingEffect, "dragEnd", function () {
+				assert.ok(true, "dragEnd should be called");
+			});
+
+			scrollview._end();
+
+			assert.equal(scrollview.dragging, false, "dragging is false");
+
+			helpers.restoreStub(scrollview.bouncingEffect, "dragEnd");
+			helpers.restoreStub(scrollview, "_setBouncingEffect");
+		});
+
+		QUnit.test("showBouncingEffect & hideBouncingEffect", 4, function (assert) {
+			var scrollview = new Scrollview();
+
+			scrollview.bouncingEffect = {
+				drag: function (x, y) {
+					assert.ok(true, "drag should be called");
+					assert.equal(x, 0, "x is 0");
+					assert.equal(y, 0, "y is 0");
+				},
+				dragEnd: function () {
+					assert.ok(true, "dragEnd should be called");
+				}
+			}
+
+			scrollview.showBouncingEffect();
+			scrollview.hideBouncingEffect();
+
+			helpers.restoreStub(scrollview.bouncingEffect, "dragEnd");
+			helpers.restoreStub(scrollview, "_setBouncingEffect");
+		});
 	}
 	if (typeof define === "function") {
 		define(function () {