Rebuild testing setup (#1226)

This PR basically rebuilds the testing infra with code in place to keep
existing tests working.

This was done so we can add tests for the CSS language server in a
followup PR.

packages/tailwindcss-language-server/src/config.ts

@@ -12,6 +12,7 @@ function getDefaultSettings(): Settings {
   return {
     editor: { tabSize: 2 },
     tailwindCSS: {
+      inspectPort: null,
       emmetCompletions: false,
       classAttributes: ['class', 'className', 'ngClass', 'class:list'],
       codeActions: true,

packages/tailwindcss-language-server/src/testing/index.ts

@@ -1,4 +1,4 @@
-import { afterAll, onTestFinished, test, TestOptions } from 'vitest'
+import { onTestFinished, test, TestOptions } from 'vitest'
 import * as fs from 'node:fs/promises'
 import * as path from 'node:path'
 import * as proc from 'node:child_process'
@@ -16,7 +16,7 @@ export interface Storage {
 
 export interface TestConfig<Extras extends {}> {
   name: string
-  fs: Storage
+  fs?: Storage
   prepare?(utils: TestUtils): Promise<Extras>
   handle(utils: TestUtils & Extras): void | Promise<void>
 
@@ -43,8 +43,10 @@ async function setup<T>(config: TestConfig<T>): Promise<TestUtils> {
 
   await fs.mkdir(baseDir, { recursive: true })
 
-  await prepareFileSystem(baseDir, config.fs)
-  await installDependencies(baseDir, config.fs)
+  if (config.fs) {
+    await prepareFileSystem(baseDir, config.fs)
+    await installDependencies(baseDir, config.fs)
+  }
 
   onTestFinished(async (result) => {
     // Once done, move all the files to a new location

packages/tailwindcss-language-server/src/tw.ts

@@ -553,6 +553,7 @@ export class TW {
           configTailwindVersionMap.get(projectConfig.configPath),
           userLanguages,
           resolver,
+          baseUri,
         ),
       ),
     )
@@ -663,6 +664,11 @@ export class TW {
         }),
       )
     }
+
+    // TODO: This is a hack and shouldn't be necessary
+    if (isTestMode) {
+      await this.connection.sendNotification('@/tailwindCSS/serverReady')
+    }
   }
 
   private filterNewWatchPatterns(patterns: string[]) {
@@ -684,6 +690,7 @@ export class TW {
     tailwindVersion: string,
     userLanguages: Record<string, string>,
     resolver: Resolver,
+    baseUri: URI,
   ): Promise<void> {
     let key = String(this.projectCounter++)
     const project = await createProjectService(
@@ -717,6 +724,7 @@ export class TW {
     }
 
     this.connection.sendNotification('@/tailwindCSS/projectDetails', {
+      uri: baseUri.toString(),
       config: projectConfig.configPath,
       tailwind: projectConfig.tailwind,
     })