Work on moving Document into its own wrapper

src/file/document-wrapper.spec.ts

@@ -0,0 +1,50 @@
+import { expect } from "chai";
+import * as sinon from "sinon";
+
+import { FooterWrapper } from "./footer-wrapper";
+import { Media } from "./media";
+import { Paragraph } from "./paragraph";
+import { Table, TableCell, TableRow } from "./table";
+
+describe("FooterWrapper", () => {
+    describe("#add", () => {
+        it("should call the underlying footer's addParagraph", () => {
+            const file = new FooterWrapper(new Media(), 1);
+            const spy = sinon.spy(file.View, "add");
+            file.add(new Paragraph({}));
+
+            expect(spy.called).to.equal(true);
+        });
+
+        it("should call the underlying footer's addParagraph", () => {
+            const file = new FooterWrapper(new Media(), 1);
+            const spy = sinon.spy(file.View, "add");
+            file.add(
+                new Table({
+                    rows: [
+                        new TableRow({
+                            children: [
+                                new TableCell({
+                                    children: [new Paragraph("hello")],
+                                }),
+                            ],
+                        }),
+                    ],
+                }),
+            );
+
+            expect(spy.called).to.equal(true);
+        });
+    });
+
+    describe("#addChildElement", () => {
+        it("should call the underlying footer's addChildElement", () => {
+            const file = new FooterWrapper(new Media(), 1);
+            const spy = sinon.spy(file.View, "addChildElement");
+            // tslint:disable-next-line:no-any
+            file.addChildElement({} as any);
+
+            expect(spy.called).to.equal(true);
+        });
+    });
+});