create node-test

node-test/equal.test.js

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+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+test("1 + 2 = 3", () => {
+  assert.equal(1 + 2, 3);
+});

node-test/hello.js

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+export default "hello!";

node-test/hello.test.js

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+import { test } from "node:test";
+import assert from "node:assert/strict";
+import message from "./hello.js";
+
+test("say hello", () => {
+  assert.equal(message, "hello!");
+});

node-test/package.json

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+{
+  "type": "module",
+  "scripts": {
+    "test": "node --test"
+  },
+  "engines": {
+    "node": "^18.7.0"
+  }
+}

node-test/parse-json.test.js

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+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+test("parse json", () => {
+  const json = `{"name": "太郎", "age": 42}`;
+  const obj = JSON.parse(json);
+  assert.deepEqual(obj, { name: "太郎", age: 42 });
+});