Add sanity test of napi binding

Author: oblador

.gitignore

@@ -28,5 +28,6 @@ node_modules
 
 /napi/*
 !/napi/src
+!/napi/test
 !/napi/*.rs
 !/napi/Cargo.toml

napi/test/sanity.spec.mjs

@@ -0,0 +1,26 @@
+// @ts-check
+import * as assert from "node:assert";
+import { resolve, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import { getAffected } from "../index.js";
+
+const fixturesPath = resolve(
+  fileURLToPath(import.meta.url),
+  "../../../fixtures/nested"
+);
+
+const testFiles = [
+  join(fixturesPath, "module.spec.js"),
+  join(fixturesPath, "sub-module.spec.js"),
+];
+const changedFiles = [join(fixturesPath, "another-module.js")];
+const resolverOptions = {
+  extensions: [".js", ".jsx", ".ts", ".tsx"],
+  moduleDirectories: ["node_modules"],
+  rootDir: process.cwd(),
+};
+
+const affected = getAffected(testFiles, changedFiles, resolverOptions);
+
+assert.deepEqual(affected.errors, []);
+assert.deepEqual(affected.files.sort(), testFiles.sort());