Add brave as alternative WebSearchTool

src/tools/WebSearchTool/__tests__/adapterFactory.test.ts

@@ -0,0 +1,70 @@
+import { afterEach, describe, expect, mock, test } from 'bun:test'
+
+let isFirstPartyBaseUrl = true
+
+mock.module('../adapters/apiAdapter.js', () => ({
+  ApiSearchAdapter: class ApiSearchAdapter {},
+}))
+
+mock.module('../adapters/bingAdapter.js', () => ({
+  BingSearchAdapter: class BingSearchAdapter {},
+}))
+
+mock.module('../adapters/braveAdapter.js', () => ({
+  BraveSearchAdapter: class BraveSearchAdapter {},
+}))
+
+mock.module('../../../utils/model/providers.js', () => ({
+  isFirstPartyAnthropicBaseUrl: () => isFirstPartyBaseUrl,
+}))
+
+const { createAdapter } = await import('../adapters/index')
+
+const originalWebSearchAdapter = process.env.WEB_SEARCH_ADAPTER
+
+afterEach(() => {
+  isFirstPartyBaseUrl = true
+
+  if (originalWebSearchAdapter === undefined) {
+    delete process.env.WEB_SEARCH_ADAPTER
+  } else {
+    process.env.WEB_SEARCH_ADAPTER = originalWebSearchAdapter
+  }
+})
+
+describe('createAdapter', () => {
+  test('reuses the same instance when the selected backend does not change', () => {
+    process.env.WEB_SEARCH_ADAPTER = 'brave'
+
+    const firstAdapter = createAdapter()
+    const secondAdapter = createAdapter()
+
+    expect(firstAdapter).toBe(secondAdapter)
+    expect(firstAdapter.constructor.name).toBe('BraveSearchAdapter')
+  })
+
+  test('rebuilds the adapter when WEB_SEARCH_ADAPTER changes', () => {
+    process.env.WEB_SEARCH_ADAPTER = 'brave'
+    const braveAdapter = createAdapter()
+
+    process.env.WEB_SEARCH_ADAPTER = 'bing'
+    const bingAdapter = createAdapter()
+
+    expect(bingAdapter).not.toBe(braveAdapter)
+    expect(bingAdapter.constructor.name).toBe('BingSearchAdapter')
+  })
+
+  test('selects the API adapter for first-party Anthropic URLs', () => {
+    delete process.env.WEB_SEARCH_ADAPTER
+    isFirstPartyBaseUrl = true
+
+    expect(createAdapter().constructor.name).toBe('ApiSearchAdapter')
+  })
+
+  test('selects the Bing adapter for third-party Anthropic base URLs', () => {
+    delete process.env.WEB_SEARCH_ADAPTER
+    isFirstPartyBaseUrl = false
+
+    expect(createAdapter().constructor.name).toBe('BingSearchAdapter')
+  })
+})