Write first clunky test

Author: IanVS

index.test.js

@@ -0,0 +1,28 @@
+import postcss from "postcss";
+import { readFileSync } from "node:fs";
+import path from "node:path";
+import { describe, it, expect } from "vitest";
+
+const plugin = (await import(".")).default;
+
+async function run(input, output, opts = {}, postcssOpts = {}) {
+  let result = await postcss([plugin(opts)]).process(input, postcssOpts);
+  expect(result.css).toEqual(output);
+  expect(result.warnings()).toHaveLength(0);
+}
+
+describe("postcss-assign-layer", () => {
+  it("does the thing", async () => {
+    const filePath = path.resolve("test/fixtures/component.module.css");
+    const file = readFileSync(filePath, "utf-8");
+
+    await run(
+      file,
+      "@layer components {a {\n  color: BurlyWood;\n}\n}\n",
+      {},
+      {
+        from: filePath,
+      }
+    );
+  });
+});

index.test.mjs

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+a {
+  color: BurlyWood;
+}