test(core): add initial tests (#195)

.changeset/gold-dryers-bake.md

@@ -0,0 +1,5 @@
+---
+"@clack/core": patch
+---
+
+Fixes a bug which kept the terminal cursor hidden after a prompt is cancelled

.github/workflows/ci.yml

@@ -1,14 +1,7 @@
 name: CI
 
 on:
-  push:
-    branches:
-      - main
-
-permissions:
-  contents: write
-  pull-requests: write
-  packages: write
+  pull_request_target:
 
 # Automatically cancel in-progress actions on the same branch
 concurrency:
@@ -28,17 +21,5 @@ jobs:
           cache: "pnpm"
       - if: ${{ steps.cache-node.outputs.cache-hit != 'true' }}
         run: pnpm install
-      # TODO: is this manual build step actually needed?
-      # `prepack` hook _should_ run but doesn't seem to.
       - run: pnpm run type-check
-      - run: pnpm run build
-      - uses: changesets/action@v1
-        if: ${{ github.event_name != 'pull_request' }}
-        with:
-          version: pnpm run ci:version
-          publish: pnpm run ci:publish
-          commit: "[ci] release"
-          title: "[ci] release"
-        env:
-          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - run: pnpm run test

.github/workflows/release.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+  packages: write
+
+# Automatically cancel in-progress actions on the same branch
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request_target' && github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build Packages
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: pnpm/action-setup@v2
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: "pnpm"
+      - if: ${{ steps.cache-node.outputs.cache-hit != 'true' }}
+        run: pnpm install
+      # TODO: is this manual build step actually needed?
+      # `prepack` hook _should_ run but doesn't seem to.
+      - run: pnpm run type-check
+      - run: pnpm run build
+      - uses: changesets/action@v1
+        if: ${{ github.event_name != 'pull_request' }}
+        with:
+          version: pnpm run ci:version
+          publish: pnpm run ci:publish
+          commit: "[ci] release"
+          title: "[ci] release"
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

package.json

@@ -13,6 +13,7 @@
     "format:code": "prettier -w . --cache",
     "format:imports": "organize-imports-cli ./packages/*/tsconfig.json",
     "type-check": "tsc",
+    "test": "pnpm -r run test",
     "ci:version": "changeset version && pnpm install --no-frozen-lockfile",
     "ci:publish": "changeset publish",
     "ci:format": "pnpm run format"

packages/core/package.json

@@ -50,13 +50,15 @@
   "packageManager": "[email protected]",
   "scripts": {
     "build": "unbuild",
-    "prepack": "pnpm build"
+    "prepack": "pnpm build",
+    "test": "vitest run"
   },
   "dependencies": {
     "picocolors": "^1.0.0",
     "sisteransi": "^1.0.5"
   },
   "devDependencies": {
+    "vitest": "^1.6.0",
     "wrap-ansi": "^8.1.0"
   }
 }

packages/core/src/utils.ts

@@ -24,7 +24,9 @@ export function block({
 	const clear = (data: Buffer, { name }: Key) => {
 		const str = String(data);
 		if (str === '\x03') {
+			if (hideCursor) output.write(cursor.show);
 			process.exit(0);
+			return;
 		}
 		if (!overwrite) return;
 		let dx = name === 'return' ? 0 : -1;
@@ -36,12 +38,12 @@ export function block({
 			});
 		});
 	};
-	if (hideCursor) process.stdout.write(cursor.hide);
+	if (hideCursor) output.write(cursor.hide);
 	input.once('keypress', clear);
 
 	return () => {
 		input.off('keypress', clear);
-		if (hideCursor) process.stdout.write(cursor.show);
+		if (hideCursor) output.write(cursor.show);
 
 		// Prevent Windows specific issues: https://github.com/natemoo-re/clack/issues/176
 		if (input.isTTY && !isWindows) input.setRawMode(false);

packages/core/test/mock-readable.ts

@@ -0,0 +1,26 @@
+import { Readable } from 'node:stream';
+
+export class MockReadable extends Readable {
+	protected _buffer: unknown[] | null = [];
+
+	_read() {
+		if (this._buffer === null) {
+			this.push(null);
+			return;
+		}
+
+		for (const val of this._buffer) {
+			this.push(val);
+		}
+
+		this._buffer = [];
+	}
+
+	pushValue(val: unknown): void {
+		this._buffer?.push(val);
+	}
+
+	close(): void {
+		this._buffer = null;
+	}
+}

packages/core/test/mock-writable.ts

@@ -0,0 +1,11 @@
+import { Writable } from 'node:stream';
+
+export class MockWritable extends Writable {
+	public buffer: string[] = [];
+
+	// biome-ignore lint/suspicious/noExplicitAny: any is the official type
+	_write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null | undefined) => void): void {
+		this.buffer.push(chunk.toString());
+		callback();
+	}
+}