test: add validation tests for esbuild and eslint config files

esbuild.config.js

@@ -8,7 +8,7 @@ import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { createRequire } from 'node:module';
 import { writeFileSync } from 'node:fs';
-import { wasmLoader } from 'esbuild-plugin-wasm';
+import { createCliConfig, createA2aServerConfig } from './esbuild.helpers.js';
 
 let esbuild;
 try {
@@ -23,96 +23,17 @@ const __dirname = path.dirname(__filename);
 const require = createRequire(import.meta.url);
 const pkg = require(path.resolve(__dirname, 'package.json'));
 
-function createWasmPlugins() {
-  const wasmBinaryPlugin = {
-    name: 'wasm-binary',
-    setup(build) {
-      build.onResolve({ filter: /\.wasm\?binary$/ }, (args) => {
-        const specifier = args.path.replace(/\?binary$/, '');
-        const resolveDir = args.resolveDir || '';
-        const isBareSpecifier =
-          !path.isAbsolute(specifier) &&
-          !specifier.startsWith('./') &&
-          !specifier.startsWith('../');
-
-        let resolvedPath;
-        if (isBareSpecifier) {
-          resolvedPath = require.resolve(specifier, {
-            paths: resolveDir ? [resolveDir, __dirname] : [__dirname],
-          });
-        } else {
-          resolvedPath = path.isAbsolute(specifier)
-            ? specifier
-            : path.join(resolveDir, specifier);
-        }
-
-        return { path: resolvedPath, namespace: 'wasm-embedded' };
-      });
-    },
-  };
-
-  return [wasmBinaryPlugin, wasmLoader({ mode: 'embedded' })];
-}
-
-const external = [
-  '@lydell/node-pty',
-  'node-pty',
-  '@lydell/node-pty-darwin-arm64',
-  '@lydell/node-pty-darwin-x64',
-  '@lydell/node-pty-linux-x64',
-  '@lydell/node-pty-win32-arm64',
-  '@lydell/node-pty-win32-x64',
-  'keytar',
-  '@google/gemini-cli-devtools',
-];
-
-const baseConfig = {
-  bundle: true,
-  platform: 'node',
-  format: 'esm',
-  external,
-  loader: { '.node': 'file' },
-  write: true,
-};
-
-const commonAliases = {
-  punycode: 'punycode/',
-};
-
-const cliConfig = {
-  ...baseConfig,
-  banner: {
-    js: `const require = (await import('node:module')).createRequire(import.meta.url); globalThis.__filename = (await import('node:url')).fileURLToPath(import.meta.url); globalThis.__dirname = (await import('node:path')).dirname(globalThis.__filename);`,
-  },
-  entryPoints: ['packages/cli/index.ts'],
-  outfile: 'bundle/gemini.js',
-  define: {
-    'process.env.CLI_VERSION': JSON.stringify(pkg.version),
-    'process.env.GEMINI_SANDBOX_IMAGE_DEFAULT': JSON.stringify(
-      pkg.config?.sandboxImageUri,
-    ),
-  },
-  plugins: createWasmPlugins(),
-  alias: {
-    'is-in-ci': path.resolve(__dirname, 'packages/cli/src/patches/is-in-ci.ts'),
-    ...commonAliases,
-  },
-  metafile: true,
-};
+const cliConfig = createCliConfig({
+  version: pkg.version,
+  dirname: __dirname,
+  requireFn: require,
+});
 
-const a2aServerConfig = {
-  ...baseConfig,
-  banner: {
-    js: `const require = (await import('node:module')).createRequire(import.meta.url); globalThis.__filename = (await import('node:url')).fileURLToPath(import.meta.url); globalThis.__dirname = (await import('node:path')).dirname(globalThis.__filename);`,
-  },
-  entryPoints: ['packages/a2a-server/src/http/server.ts'],
-  outfile: 'packages/a2a-server/dist/a2a-server.mjs',
-  define: {
-    'process.env.CLI_VERSION': JSON.stringify(pkg.version),
-  },
-  plugins: createWasmPlugins(),
-  alias: commonAliases,
-};
+const a2aServerConfig = createA2aServerConfig({
+  version: pkg.version,
+  dirname: __dirname,
+  requireFn: require,
+});
 
 Promise.allSettled([
   esbuild.build(cliConfig).then(({ metafile }) => {

esbuild.helpers.js

@@ -0,0 +1,102 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import path from 'node:path';
+import { wasmLoader } from 'esbuild-plugin-wasm';
+
+export const external = [
+  '@lydell/node-pty',
+  'node-pty',
+  '@lydell/node-pty-darwin-arm64',
+  '@lydell/node-pty-darwin-x64',
+  '@lydell/node-pty-linux-x64',
+  '@lydell/node-pty-win32-arm64',
+  '@lydell/node-pty-win32-x64',
+  'keytar',
+  '@google/gemini-cli-devtools',
+];
+
+export const baseConfig = {
+  bundle: true,
+  platform: 'node',
+  format: 'esm',
+  external,
+  loader: { '.node': 'file' },
+  write: true,
+};
+
+export const commonAliases = {
+  punycode: 'punycode/',
+};
+
+export function createWasmPlugins(requireFn, rootDir) {
+  const wasmBinaryPlugin = {
+    name: 'wasm-binary',
+    setup(build) {
+      build.onResolve({ filter: /\.wasm\?binary$/ }, (args) => {
+        const specifier = args.path.replace(/\?binary$/, '');
+        const resolveDir = args.resolveDir || '';
+        const isBareSpecifier =
+          !path.isAbsolute(specifier) &&
+          !specifier.startsWith('./') &&
+          !specifier.startsWith('../');
+
+        let resolvedPath;
+        if (isBareSpecifier) {
+          resolvedPath = requireFn.resolve(specifier, {
+            paths: resolveDir ? [resolveDir, rootDir] : [rootDir],
+          });
+        } else {
+          resolvedPath = path.isAbsolute(specifier)
+            ? specifier
+            : path.join(resolveDir, specifier);
+        }
+
+        return { path: resolvedPath, namespace: 'wasm-embedded' };
+      });
+    },
+  };
+
+  return [wasmBinaryPlugin, wasmLoader({ mode: 'embedded' })];
+}
+
+/** Creates the CLI bundle configuration. */
+export function createCliConfig({ version, dirname, requireFn }) {
+  return {
+    ...baseConfig,
+    banner: {
+      js: `import { createRequire } from 'module'; const require = createRequire(import.meta.url); globalThis.__filename = require('url').fileURLToPath(import.meta.url); globalThis.__dirname = require('path').dirname(globalThis.__filename);`,
+    },
+    entryPoints: ['packages/cli/index.ts'],
+    outfile: 'bundle/gemini.js',
+    define: {
+      'process.env.CLI_VERSION': JSON.stringify(version),
+    },
+    plugins: createWasmPlugins(requireFn, dirname),
+    alias: {
+      'is-in-ci': path.resolve(dirname, 'packages/cli/src/patches/is-in-ci.ts'),
+      ...commonAliases,
+    },
+    metafile: true,
+  };
+}
+
+/** Creates the A2A server bundle configuration. */
+export function createA2aServerConfig({ version, dirname, requireFn }) {
+  return {
+    ...baseConfig,
+    banner: {
+      js: `const require = (await import('module')).createRequire(import.meta.url); globalThis.__filename = require('url').fileURLToPath(import.meta.url); globalThis.__dirname = require('path').dirname(globalThis.__filename);`,
+    },
+    entryPoints: ['packages/a2a-server/src/http/server.ts'],
+    outfile: 'packages/a2a-server/dist/a2a-server.mjs',
+    define: {
+      'process.env.CLI_VERSION': JSON.stringify(version),
+    },
+    plugins: createWasmPlugins(requireFn, dirname),
+    alias: commonAliases,
+  };
+}