test: add buffer handling test and implement getBuffer function

Author: mayank1513

lib/__tests__/index.test.ts

@@ -36,6 +36,17 @@ describe("Raw plugin", () => {
     expect(generatedCodeContent2.toString("base64")).toBe(fileContent.toString("base64"));
   });
 
+  test("test buffer", async ({ expect }) => {
+    await esbuild.build({ ...buildOptions, entryPoints: [path.resolve(__dirname, "test4.ts")] });
+    const fileContent = fs.readFileSync(path.resolve(__dirname, "../src/index.ts"));
+    // @ts-ignore
+    const generatedCodeContent = (await import("./dist/test4.js")).getBuffer();
+    // @ts-ignore
+    expect(Buffer.from(generatedCodeContent).toString("base64")).toBe(
+      fileContent.toString("base64"),
+    );
+  });
+
   test("throws error if no file is found", async ({ expect }) => {
     let didThrow = false;
     try {

lib/__tests__/test4.ts

@@ -0,0 +1,5 @@
+// test auto complete
+
+import buffer from "../src?binary";
+
+export const getBuffer = () => buffer;