1 files changed, 158 insertions, 0 deletions
diff --git a/vanilla/node_modules/undici/lib/mock/snapshot-utils.js b/vanilla/node_modules/undici/lib/mock/snapshot-utils.js
new file mode 100644
index 0000000..a14b69c
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/mock/snapshot-utils.js
@@ -0,0 +1,158 @@
+'use strict'
+
+const { InvalidArgumentError } = require('../core/errors')
+const { runtimeFeatures } = require('../util/runtime-features.js')
+
+/**
+ * @typedef {Object} HeaderFilters
+ * @property {Set<string>} ignore - Set of headers to ignore for matching
+ * @property {Set<string>} exclude - Set of headers to exclude from matching
+ * @property {Set<string>} match - Set of headers to match (empty means match
+ */
+
+/**
+ * Creates cached header sets for performance
+ *
+ * @param {import('./snapshot-recorder').SnapshotRecorderMatchOptions} matchOptions - Matching options for headers
+ * @returns {HeaderFilters} - Cached sets for ignore, exclude, and match headers
+ */
+function createHeaderFilters (matchOptions = {}) {
+  const { ignoreHeaders = [], excludeHeaders = [], matchHeaders = [], caseSensitive = false } = matchOptions
+
+  return {
+    ignore: new Set(ignoreHeaders.map(header => caseSensitive ? header : header.toLowerCase())),
+    exclude: new Set(excludeHeaders.map(header => caseSensitive ? header : header.toLowerCase())),
+    match: new Set(matchHeaders.map(header => caseSensitive ? header : header.toLowerCase()))
+  }
+}
+
+const crypto = runtimeFeatures.has('crypto')
+  ? require('node:crypto')
+  : null
+
+/**
+ * @callback HashIdFunction
+ * @param {string} value - The value to hash
+ * @returns {string} - The base64url encoded hash of the value
+ */
+
+/**
+ * Generates a hash for a given value
+ * @type {HashIdFunction}
+ */
+const hashId = crypto?.hash
+  ? (value) => crypto.hash('sha256', value, 'base64url')
+  : (value) => Buffer.from(value).toString('base64url')
+
+/**
+ * @typedef {(url: string) => boolean} IsUrlExcluded Checks if a URL matches any of the exclude patterns
+ */
+
+/** @typedef {{[key: Lowercase<string>]: string}} NormalizedHeaders */
+/** @typedef {Array<string>} UndiciHeaders */
+/** @typedef {Record<string, string|string[]>} Headers */
+
+/**
+ * @param {*} headers
+ * @returns {headers is UndiciHeaders}
+ */
+function isUndiciHeaders (headers) {
+  return Array.isArray(headers) && (headers.length & 1) === 0
+}
+
+/**
+ * Factory function to create a URL exclusion checker
+ * @param {Array<string| RegExp>} [excludePatterns=[]] - Array of patterns to exclude
+ * @returns {IsUrlExcluded} - A function that checks if a URL matches any of the exclude patterns
+ */
+function isUrlExcludedFactory (excludePatterns = []) {
+  if (excludePatterns.length === 0) {
+    return () => false
+  }
+
+  return function isUrlExcluded (url) {
+    let urlLowerCased
+
+    for (const pattern of excludePatterns) {
+      if (typeof pattern === 'string') {
+        if (!urlLowerCased) {
+          // Convert URL to lowercase only once
+          urlLowerCased = url.toLowerCase()
+        }
+        // Simple string match (case-insensitive)
+        if (urlLowerCased.includes(pattern.toLowerCase())) {
+          return true
+        }
+      } else if (pattern instanceof RegExp) {
+        // Regex pattern match
+        if (pattern.test(url)) {
+          return true
+        }
+      }
+    }
+
+    return false
+  }
+}
+
+/**
+ * Normalizes headers for consistent comparison
+ *
+ * @param {Object|UndiciHeaders} headers - Headers to normalize
+ * @returns {NormalizedHeaders} - Normalized headers as a lowercase object
+ */
+function normalizeHeaders (headers) {
+  /** @type {NormalizedHeaders} */
+  const normalizedHeaders = {}
+
+  if (!headers) return normalizedHeaders
+
+  // Handle array format (undici internal format: [name, value, name, value, ...])
+  if (isUndiciHeaders(headers)) {
+    for (let i = 0; i < headers.length; i += 2) {
+      const key = headers[i]
+      const value = headers[i + 1]
+      if (key && value !== undefined) {
+        // Convert Buffers to strings if needed
+        const keyStr = Buffer.isBuffer(key) ? key.toString() : key
+        const valueStr = Buffer.isBuffer(value) ? value.toString() : value
+        normalizedHeaders[keyStr.toLowerCase()] = valueStr
+      }
+    }
+    return normalizedHeaders
+  }
+
+  // Handle object format
+  if (headers && typeof headers === 'object') {
+    for (const [key, value] of Object.entries(headers)) {
+      if (key && typeof key === 'string') {
+        normalizedHeaders[key.toLowerCase()] = Array.isArray(value) ? value.join(', ') : String(value)
+      }
+    }
+  }
+
+  return normalizedHeaders
+}
+
+const validSnapshotModes = /** @type {const} */ (['record', 'playback', 'update'])
+
+/** @typedef {typeof validSnapshotModes[number]} SnapshotMode */
+
+/**
+ * @param {*} mode - The snapshot mode to validate
+ * @returns {asserts mode is SnapshotMode}
+ */
+function validateSnapshotMode (mode) {
+  if (!validSnapshotModes.includes(mode)) {
+    throw new InvalidArgumentError(`Invalid snapshot mode: ${mode}. Must be one of: ${validSnapshotModes.join(', ')}`)
+  }
+}
+
+module.exports = {
+  createHeaderFilters,
+  hashId,
+  isUndiciHeaders,
+  normalizeHeaders,
+  isUrlExcludedFactory,
+  validateSnapshotMode
+}