add test

src/setup.test.ts

@@ -1,5 +1,5 @@
 import nock from "nock";
-import { downloadCage, getLatestVersion } from "./setup";
+import { downloadCage, getLatestVersion, parseChecksum } from "./setup";
 import os from "node:os";
 import fs from "node:fs/promises";
 import path from "node:path";
@@ -107,3 +107,17 @@ describe("downloadCage", () => {
     ).rejects.toThrow("Checksum mismatch:");
   });
 });
+
+describe("parseChecksum", () => {
+  test("basic", async () => {
+    const map = await parseChecksum(
+      path.resolve(__dirname, "testdata/0.1.0/canarycage_0.1.0_checksums.txt"),
+    );
+    expect(map.get("canarycage_linux_amd64.zip")).toBe(
+      "e00aeaebd63dc17194891514411426aa50ec51b1095fe85df927106184c71b47",
+    );
+    expect(map.get("canarycage_darwin_arm64.zip")).toBe(
+      "e00aeaebd63dc17194891514411426aa50ec51b1095fe85df927106184c71b47",
+    );
+  });
+});

src/setup.ts

@@ -82,7 +82,9 @@ function getPlatformArch(): string {
   return `${platform}_${arch}`;
 }
 
-async function parseChecksum(file: string): Promise<Map<string, string>> {
+export async function parseChecksum(
+  file: string,
+): Promise<Map<string, string>> {
   const buf = await fs.readFile(file, "utf-8");
   const entries: [string, string][] = buf
     .split("\n")