Add tests

src/patcher/from-docx.spec.ts

@@ -0,0 +1,41 @@
+import { expect } from "chai";
+import * as sinon from "sinon";
+import * as JSZip from "jszip";
+
+import { TextRun } from "@file/paragraph";
+
+import { patchDocument, PatchType } from "./from-docx";
+
+describe("from-docx", () => {
+    describe("patchDocument", () => {
+        before(() => {
+            sinon.createStubInstance(JSZip, {});
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any
+            sinon.stub(JSZip, "loadAsync").callsFake(
+                () =>
+                    new Promise<JSZip>((resolve) => {
+                        const zip = new JSZip();
+
+                        zip.file("word/document.xml", `<?xml version="1.0" encoding="UTF-8" standalone="yes"?>`);
+                        resolve(zip);
+                    }),
+            );
+        });
+
+        after(() => {
+            (JSZip.loadAsync as unknown as sinon.SinonStub).restore();
+        });
+
+        it("should find the index of a run element with a token", async () => {
+            const output = await patchDocument(Buffer.from(""), {
+                patches: {
+                    name: {
+                        type: PatchType.PARAGRAPH,
+                        children: [new TextRun("Sir. "), new TextRun("John Doe"), new TextRun("(The Conqueror)")],
+                    },
+                },
+            });
+            expect(output).to.not.be.undefined;
+        });
+    });
+});