Prettier support for `.astro` files (#106)

* docs: fix readme

* chore: scaffold prettier plugin

* chore(prettier): switch to cjs

* test(prettier): scaffold prettier tests

* test(prettier): add simple prettier tests

* feat(prettier): first pass

* refactor: expose parser as CJS export

* test(prettier): add long expression

* refactor(prettier): use Astro parser + built-in prettier doc for prettier plugin

* chore: remove parser from git

* chore: add prettier-plugin-astro `build` to workflow

* chore: update package-lock

* chore: do not build prettier-plugin-astro

* fix: update engines

* chore: remove NPM restriction

* chore: fix workflow paths

* chore: update build script

* test: fix prettier expr test

* chore: fix parser build on windows

* refactor: add parser tsconfig, extending base config

* chore: relax ban-ts-comment

* chore: fix lint issue

Co-authored-by: Nate Moore <nate@skypack.dev>

1 files changed, 44 insertions, 0 deletions

diff --git a/test/astro-prettier.test.js b/test/astro-prettier.test.js
new file mode 100644
index 000000000..1dd1887f4
--- /dev/null
+++ b/test/astro-prettier.test.js
@@ -0,0 +1,44 @@
+import { suite } from 'uvu';
+import * as assert from 'uvu/assert';
+import { format } from './test-utils.js';
+import { setup } from './helpers.js';
+
+const Prettier = suite('Prettier formatting');
+
+setup(Prettier, './fixtures/astro-prettier');
+
+/** 
+  * Utility to get `[src, out]` files 
+  * @param name {string}
+  * @param ctx {any}
+  */
+const getFiles = async (name, { readFile }) => {
+  const [src, out] = await Promise.all([readFile(`/in/${name}.astro`), readFile(`/out/${name}.astro`)]);
+  return [src, out];
+}
+
+Prettier('can format a basic Astro file', async (ctx) => {
+  const [src, out] = await getFiles('basic', ctx);
+  assert.not.equal(src, out);
+
+  const formatted = format(src);
+  assert.equal(formatted, out);
+});
+
+Prettier('can format an Astro file with frontmatter', async (ctx) => {
+  const [src, out] = await getFiles('frontmatter', ctx);
+  assert.not.equal(src, out);
+  
+  const formatted = format(src);
+  assert.equal(formatted, out);
+});
+
+Prettier('can format an Astro file with embedded JSX expressions', async (ctx) => {
+  const [src, out] = await getFiles('embedded-expr', ctx);
+  assert.not.equal(src, out);
+  
+  const formatted = format(src);
+  assert.equal(formatted, out);
+});
+
+Prettier.run();