From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 .../node_modules/undici/lib/mock/mock-client.js    | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 vanilla/node_modules/undici/lib/mock/mock-client.js

(limited to 'vanilla/node_modules/undici/lib/mock/mock-client.js')

diff --git a/vanilla/node_modules/undici/lib/mock/mock-client.js b/vanilla/node_modules/undici/lib/mock/mock-client.js
new file mode 100644
index 0000000..b3be7ab
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/mock/mock-client.js
@@ -0,0 +1,68 @@
+'use strict'
+
+const { promisify } = require('node:util')
+const Client = require('../dispatcher/client')
+const { buildMockDispatch } = require('./mock-utils')
+const {
+  kDispatches,
+  kMockAgent,
+  kClose,
+  kOriginalClose,
+  kOrigin,
+  kOriginalDispatch,
+  kConnected,
+  kIgnoreTrailingSlash
+} = require('./mock-symbols')
+const { MockInterceptor } = require('./mock-interceptor')
+const Symbols = require('../core/symbols')
+const { InvalidArgumentError } = require('../core/errors')
+
+/**
+ * MockClient provides an API that extends the Client to influence the mockDispatches.
+ */
+class MockClient extends Client {
+  constructor (origin, opts) {
+    if (!opts || !opts.agent || typeof opts.agent.dispatch !== 'function') {
+      throw new InvalidArgumentError('Argument opts.agent must implement Agent')
+    }
+
+    super(origin, opts)
+
+    this[kMockAgent] = opts.agent
+    this[kOrigin] = origin
+    this[kIgnoreTrailingSlash] = opts.ignoreTrailingSlash ?? false
+    this[kDispatches] = []
+    this[kConnected] = 1
+    this[kOriginalDispatch] = this.dispatch
+    this[kOriginalClose] = this.close.bind(this)
+
+    this.dispatch = buildMockDispatch.call(this)
+    this.close = this[kClose]
+  }
+
+  get [Symbols.kConnected] () {
+    return this[kConnected]
+  }
+
+  /**
+   * Sets up the base interceptor for mocking replies from undici.
+   */
+  intercept (opts) {
+    return new MockInterceptor(
+      opts && { ignoreTrailingSlash: this[kIgnoreTrailingSlash], ...opts },
+      this[kDispatches]
+    )
+  }
+
+  cleanMocks () {
+    this[kDispatches] = []
+  }
+
+  async [kClose] () {
+    await promisify(this[kOriginalClose])()
+    this[kConnected] = 0
+    this[kMockAgent][Symbols.kClients].delete(this[kOrigin])
+  }
+}
+
+module.exports = MockClient
-- 
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