Initial tests set up (#10)

* Begin debugging

* Initial tests set up

This adds tests using uvu (we can switch if people want) and restructures things a bit so that it's easier to test.

Like in snowpack you set up a little project. In our tests you can say:

```js
const result = await runtime.load('/blog/hello-world')
```

And analyze the result. I included a `test-helpers.js` which has a function that will turn HTML into a cheerio instance, for inspecting the result HTML.

* Add CI

* Remove extra console logs

* Formatting

1 files changed, 2 insertions, 21 deletions

diff --git a/src/cli.ts b/src/cli.ts
index 62e50f3eb..0a5c9612d 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -1,10 +1,10 @@
 import type { AstroConfig } from './@types/astro';
 
 import * as colors from 'kleur/colors';
-import { join as pathJoin, resolve as pathResolve } from 'path';
-import { existsSync, promises as fsPromises } from 'fs';
+import { promises as fsPromises } from 'fs';
 import yargs from 'yargs-parser';
 
+import { loadConfig } from './config.js';
 import generate from './generate.js';
 import devServer from './dev.js';
 
@@ -49,25 +49,6 @@ async function printVersion() {
   console.error(pkg.version);
 }
 
-async function loadConfig(rawRoot: string | undefined): Promise<AstroConfig | undefined> {
-  if (typeof rawRoot === 'undefined') {
-    rawRoot = process.cwd();
-  }
-
-  const root = pathResolve(rawRoot);
-  const fileProtocolRoot = `file://${root}/`;
-  const astroConfigPath = pathJoin(root, 'astro.config.mjs');
-
-  if (!existsSync(astroConfigPath)) {
-    return undefined;
-  }
-
-  const astroConfig: AstroConfig = (await import(astroConfigPath)).default;
-  astroConfig.projectRoot = new URL(astroConfig.projectRoot + '/', fileProtocolRoot);
-  astroConfig.hmxRoot = new URL(astroConfig.hmxRoot + '/', fileProtocolRoot);
-  return astroConfig;
-}
-
 async function runCommand(rawRoot: string, cmd: (a: AstroConfig) => Promise<void>) {
   const astroConfig = await loadConfig(rawRoot);
   if (typeof astroConfig === 'undefined') {