fix: should check lib array non-empty (#820)

packages/core/src/config.ts

@@ -1571,9 +1571,11 @@ export async function composeCreateRsbuildConfig(
     ...sharedRsbuildConfig
   } = rslibConfig;
 
-  if (!libConfigsArray) {
+  if (!Array.isArray(libConfigsArray) || libConfigsArray.length === 0) {
     throw new Error(
-      `Expect lib field to be an array, but got ${libConfigsArray}.`,
+      `Expect "lib" field to be a non-empty array, but got: ${color.cyan(
+        JSON.stringify(libConfigsArray),
+      )}.`,
     );
   }
 

tests/integration/config-check/index.test.ts

@@ -0,0 +1,15 @@
+import { join } from 'node:path';
+import stripAnsi from 'strip-ansi';
+import { buildAndGetResults } from 'test-helper';
+import { expect, test } from 'vitest';
+
+test('should throw error when lib array not exists or empty', async () => {
+  const fixturePath = join(__dirname, 'lib-array');
+  try {
+    await buildAndGetResults({ fixturePath });
+  } catch (error) {
+    expect(stripAnsi((error as Error).message)).toMatchInlineSnapshot(
+      `"Expect "lib" field to be a non-empty array, but got: []."`,
+    );
+  }
+});

tests/integration/config-check/lib-array/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "config-check-lib-array-test",
+  "version": "1.0.0",
+  "private": true,
+  "type": "module"
+}

tests/integration/config-check/lib-array/rslib.config.ts

@@ -0,0 +1,5 @@
+import { defineConfig } from '@rslib/core';
+
+export default defineConfig({
+  lib: [],
+});