fix(pagination) Keep start page number (edcarroll#286)

* fix(pagination) Keep start page number

* Update pageCount inside collectionSize

* Move pageSize above collectionSize setter

* remove trailing whitespace

src/collections/pagination/components/pagination.spec.ts

@@ -196,4 +196,14 @@ describe("Pagination", () => {
         expect(pagination.pages.length).toBe(5);
         expect(pagination.hasNavigationLinks).toBe(true);
     });
+    it("should keep the start page number", () => {
+        comp.collectionSize = 100;
+        comp.pageSize = 10;
+        comp.maxSize = 5;
+        comp.currentPage = 5;
+
+        fixture.detectChanges();
+        expect(comp.currentPage).toBe(5);
+        expect(pagination.page).toBe(5);
+    });
 });

src/collections/pagination/components/pagination.ts

@@ -66,18 +66,19 @@ export class SuiPagination implements OnChanges {
         this._maxSize = (value != undefined) ? Math.max(value, 1) : undefined;
     }
 
+    @Input()
+    public pageSize:number;
+
     @Input()
     public get collectionSize():number {
         return this._collectionSize;
     }
 
     public set collectionSize(value:number) {
         this._collectionSize = Math.max(value, 0);
+        this.pageCount = Math.max(1, Math.ceil(this._collectionSize / this.pageSize));
     }
 
-    @Input()
-    public pageSize:number;
-
     @Input()
     public get hasNavigationLinks():boolean {
         const maxSize = this._maxSize || this.pageCount;