Add tests

src/file/file.spec.ts

@@ -1,8 +1,11 @@
 import { expect } from "chai";
+import * as sinon from "sinon";
 
 import { Formatter } from "export/formatter";
 
 import { File } from "./file";
+import { Paragraph } from "./paragraph";
+import { Table } from "./table";
 
 describe("File", () => {
     describe("#constructor", () => {
@@ -55,4 +58,24 @@ describe("File", () => {
             expect(tree["w:body"][1]["w:sectPr"][9]["w:footerReference"][0]._attr["w:type"]).to.equal("even");
         });
     });
+
+    describe("#addParagraph", () => {
+        it("should call the underlying header's addParagraph", () => {
+            const file = new File();
+            const spy = sinon.spy(file.Document, "addParagraph");
+            file.addParagraph(new Paragraph());
+
+            expect(spy.called).to.equal(true);
+        });
+    });
+
+    describe("#addTable", () => {
+        it("should call the underlying header's addParagraph", () => {
+            const wrapper = new File();
+            const spy = sinon.spy(wrapper.Document, "addTable");
+            wrapper.addTable(new Table(1, 1));
+
+            expect(spy.called).to.equal(true);
+        });
+    });
 });