Add total number of pages in a section

src/file/paragraph/run/page-number.spec.ts

@@ -2,7 +2,7 @@ import { expect } from "chai";
 
 import { Formatter } from "export/formatter";
 
-import { NumberOfPages, Page } from "./page-number";
+import { NumberOfPages, NumberOfPagesSection, Page } from "./page-number";
 
 describe("Page", () => {
     describe("#constructor()", () => {
@@ -21,3 +21,12 @@ describe("NumberOfPages", () => {
         });
     });
 });
+
+describe("NumberOfPagesSection", () => {
+    describe("#constructor()", () => {
+        it("uses the font name for both ascii and hAnsi", () => {
+            const tree = new Formatter().format(new NumberOfPagesSection());
+            expect(tree).to.deep.equal({ "w:instrText": [{ _attr: { "xml:space": "preserve" } }, "SECTIONPAGES"] });
+        });
+    });
+});