Add a selftest and support for .cargo/bin

src/restore.ts

@@ -1,6 +1,6 @@
 import * as cache from "@actions/cache";
 import * as core from "@actions/core";
-import { cleanTarget, getCacheConfig, getPackages, stateKey } from "./common";
+import { cleanTarget, getCacheConfig, getCargoBins, getPackages, stateBins, stateKey } from "./common";
 
 async function run() {
   try {
@@ -8,6 +8,9 @@ async function run() {
 
     const { paths, key, restoreKeys } = await getCacheConfig();
 
+    const bins = await getCargoBins();
+    core.saveState(stateBins, JSON.stringify([...bins]));
+
     core.info(`Restoring paths:\n    ${paths.join("\n    ")}`);
     core.info(`In directory:\n    ${process.cwd()}`);
     core.info(`Using keys:\n    ${[key, ...restoreKeys].join("\n    ")}`);