feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

2 files changed, 695 insertions, 0 deletions

diff --git a/vanilla/node_modules/undici/lib/cache/memory-cache-store.js b/vanilla/node_modules/undici/lib/cache/memory-cache-store.js
new file mode 100644
index 0000000..dba29ae
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/cache/memory-cache-store.js
@@ -0,0 +1,234 @@
+'use strict'
+
+const { Writable } = require('node:stream')
+const { EventEmitter } = require('node:events')
+const { assertCacheKey, assertCacheValue } = require('../util/cache.js')
+
+/**
+ * @typedef {import('../../types/cache-interceptor.d.ts').default.CacheKey} CacheKey
+ * @typedef {import('../../types/cache-interceptor.d.ts').default.CacheValue} CacheValue
+ * @typedef {import('../../types/cache-interceptor.d.ts').default.CacheStore} CacheStore
+ * @typedef {import('../../types/cache-interceptor.d.ts').default.GetResult} GetResult
+ */
+
+/**
+ * @implements {CacheStore}
+ * @extends {EventEmitter}
+ */
+class MemoryCacheStore extends EventEmitter {
+  #maxCount = 1024
+  #maxSize = 104857600 // 100MB
+  #maxEntrySize = 5242880 // 5MB
+
+  #size = 0
+  #count = 0
+  #entries = new Map()
+  #hasEmittedMaxSizeEvent = false
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.MemoryCacheStoreOpts | undefined} [opts]
+   */
+  constructor (opts) {
+    super()
+    if (opts) {
+      if (typeof opts !== 'object') {
+        throw new TypeError('MemoryCacheStore options must be an object')
+      }
+
+      if (opts.maxCount !== undefined) {
+        if (
+          typeof opts.maxCount !== 'number' ||
+          !Number.isInteger(opts.maxCount) ||
+          opts.maxCount < 0
+        ) {
+          throw new TypeError('MemoryCacheStore options.maxCount must be a non-negative integer')
+        }
+        this.#maxCount = opts.maxCount
+      }
+
+      if (opts.maxSize !== undefined) {
+        if (
+          typeof opts.maxSize !== 'number' ||
+          !Number.isInteger(opts.maxSize) ||
+          opts.maxSize < 0
+        ) {
+          throw new TypeError('MemoryCacheStore options.maxSize must be a non-negative integer')
+        }
+        this.#maxSize = opts.maxSize
+      }
+
+      if (opts.maxEntrySize !== undefined) {
+        if (
+          typeof opts.maxEntrySize !== 'number' ||
+          !Number.isInteger(opts.maxEntrySize) ||
+          opts.maxEntrySize < 0
+        ) {
+          throw new TypeError('MemoryCacheStore options.maxEntrySize must be a non-negative integer')
+        }
+        this.#maxEntrySize = opts.maxEntrySize
+      }
+    }
+  }
+
+  /**
+   * Get the current size of the cache in bytes
+   * @returns {number} The current size of the cache in bytes
+   */
+  get size () {
+    return this.#size
+  }
+
+  /**
+   * Check if the cache is full (either max size or max count reached)
+   * @returns {boolean} True if the cache is full, false otherwise
+   */
+  isFull () {
+    return this.#size >= this.#maxSize || this.#count >= this.#maxCount
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} req
+   * @returns {import('../../types/cache-interceptor.d.ts').default.GetResult | undefined}
+   */
+  get (key) {
+    assertCacheKey(key)
+
+    const topLevelKey = `${key.origin}:${key.path}`
+
+    const now = Date.now()
+    const entries = this.#entries.get(topLevelKey)
+
+    const entry = entries ? findEntry(key, entries, now) : null
+
+    return entry == null
+      ? undefined
+      : {
+          statusMessage: entry.statusMessage,
+          statusCode: entry.statusCode,
+          headers: entry.headers,
+          body: entry.body,
+          vary: entry.vary ? entry.vary : undefined,
+          etag: entry.etag,
+          cacheControlDirectives: entry.cacheControlDirectives,
+          cachedAt: entry.cachedAt,
+          staleAt: entry.staleAt,
+          deleteAt: entry.deleteAt
+        }
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheValue} val
+   * @returns {Writable | undefined}
+   */
+  createWriteStream (key, val) {
+    assertCacheKey(key)
+    assertCacheValue(val)
+
+    const topLevelKey = `${key.origin}:${key.path}`
+
+    const store = this
+    const entry = { ...key, ...val, body: [], size: 0 }
+
+    return new Writable({
+      write (chunk, encoding, callback) {
+        if (typeof chunk === 'string') {
+          chunk = Buffer.from(chunk, encoding)
+        }
+
+        entry.size += chunk.byteLength
+
+        if (entry.size >= store.#maxEntrySize) {
+          this.destroy()
+        } else {
+          entry.body.push(chunk)
+        }
+
+        callback(null)
+      },
+      final (callback) {
+        let entries = store.#entries.get(topLevelKey)
+        if (!entries) {
+          entries = []
+          store.#entries.set(topLevelKey, entries)
+        }
+        const previousEntry = findEntry(key, entries, Date.now())
+        if (previousEntry) {
+          const index = entries.indexOf(previousEntry)
+          entries.splice(index, 1, entry)
+          store.#size -= previousEntry.size
+        } else {
+          entries.push(entry)
+          store.#count += 1
+        }
+
+        store.#size += entry.size
+
+        // Check if cache is full and emit event if needed
+        if (store.#size > store.#maxSize || store.#count > store.#maxCount) {
+          // Emit maxSizeExceeded event if we haven't already
+          if (!store.#hasEmittedMaxSizeEvent) {
+            store.emit('maxSizeExceeded', {
+              size: store.#size,
+              maxSize: store.#maxSize,
+              count: store.#count,
+              maxCount: store.#maxCount
+            })
+            store.#hasEmittedMaxSizeEvent = true
+          }
+
+          // Perform eviction
+          for (const [key, entries] of store.#entries) {
+            for (const entry of entries.splice(0, entries.length / 2)) {
+              store.#size -= entry.size
+              store.#count -= 1
+            }
+            if (entries.length === 0) {
+              store.#entries.delete(key)
+            }
+          }
+
+          // Reset the event flag after eviction
+          if (store.#size < store.#maxSize && store.#count < store.#maxCount) {
+            store.#hasEmittedMaxSizeEvent = false
+          }
+        }
+
+        callback(null)
+      }
+    })
+  }
+
+  /**
+   * @param {CacheKey} key
+   */
+  delete (key) {
+    if (typeof key !== 'object') {
+      throw new TypeError(`expected key to be object, got ${typeof key}`)
+    }
+
+    const topLevelKey = `${key.origin}:${key.path}`
+
+    for (const entry of this.#entries.get(topLevelKey) ?? []) {
+      this.#size -= entry.size
+      this.#count -= 1
+    }
+    this.#entries.delete(topLevelKey)
+  }
+}
+
+function findEntry (key, entries, now) {
+  return entries.find((entry) => (
+    entry.deleteAt > now &&
+    entry.method === key.method &&
+    (entry.vary == null || Object.keys(entry.vary).every(headerName => {
+      if (entry.vary[headerName] === null) {
+        return key.headers[headerName] === undefined
+      }
+
+      return entry.vary[headerName] === key.headers[headerName]
+    }))
+  ))
+}
+
+module.exports = MemoryCacheStore
diff --git a/vanilla/node_modules/undici/lib/cache/sqlite-cache-store.js b/vanilla/node_modules/undici/lib/cache/sqlite-cache-store.js
new file mode 100644
index 0000000..7cb4aa7
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/cache/sqlite-cache-store.js
@@ -0,0 +1,461 @@
+'use strict'
+
+const { Writable } = require('node:stream')
+const { assertCacheKey, assertCacheValue } = require('../util/cache.js')
+
+let DatabaseSync
+
+const VERSION = 3
+
+// 2gb
+const MAX_ENTRY_SIZE = 2 * 1000 * 1000 * 1000
+
+/**
+ * @typedef {import('../../types/cache-interceptor.d.ts').default.CacheStore} CacheStore
+ * @implements {CacheStore}
+ *
+ * @typedef {{
+ *  id: Readonly<number>,
+ *  body?: Uint8Array
+ *  statusCode: number
+ *  statusMessage: string
+ *  headers?: string
+ *  vary?: string
+ *  etag?: string
+ *  cacheControlDirectives?: string
+ *  cachedAt: number
+ *  staleAt: number
+ *  deleteAt: number
+ * }} SqliteStoreValue
+ */
+module.exports = class SqliteCacheStore {
+  #maxEntrySize = MAX_ENTRY_SIZE
+  #maxCount = Infinity
+
+  /**
+   * @type {import('node:sqlite').DatabaseSync}
+   */
+  #db
+
+  /**
+   * @type {import('node:sqlite').StatementSync}
+   */
+  #getValuesQuery
+
+  /**
+   * @type {import('node:sqlite').StatementSync}
+   */
+  #updateValueQuery
+
+  /**
+   * @type {import('node:sqlite').StatementSync}
+   */
+  #insertValueQuery
+
+  /**
+   * @type {import('node:sqlite').StatementSync}
+   */
+  #deleteExpiredValuesQuery
+
+  /**
+   * @type {import('node:sqlite').StatementSync}
+   */
+  #deleteByUrlQuery
+
+  /**
+   * @type {import('node:sqlite').StatementSync}
+   */
+  #countEntriesQuery
+
+  /**
+   * @type {import('node:sqlite').StatementSync | null}
+   */
+  #deleteOldValuesQuery
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.SqliteCacheStoreOpts | undefined} opts
+   */
+  constructor (opts) {
+    if (opts) {
+      if (typeof opts !== 'object') {
+        throw new TypeError('SqliteCacheStore options must be an object')
+      }
+
+      if (opts.maxEntrySize !== undefined) {
+        if (
+          typeof opts.maxEntrySize !== 'number' ||
+          !Number.isInteger(opts.maxEntrySize) ||
+          opts.maxEntrySize < 0
+        ) {
+          throw new TypeError('SqliteCacheStore options.maxEntrySize must be a non-negative integer')
+        }
+
+        if (opts.maxEntrySize > MAX_ENTRY_SIZE) {
+          throw new TypeError('SqliteCacheStore options.maxEntrySize must be less than 2gb')
+        }
+
+        this.#maxEntrySize = opts.maxEntrySize
+      }
+
+      if (opts.maxCount !== undefined) {
+        if (
+          typeof opts.maxCount !== 'number' ||
+          !Number.isInteger(opts.maxCount) ||
+          opts.maxCount < 0
+        ) {
+          throw new TypeError('SqliteCacheStore options.maxCount must be a non-negative integer')
+        }
+        this.#maxCount = opts.maxCount
+      }
+    }
+
+    if (!DatabaseSync) {
+      DatabaseSync = require('node:sqlite').DatabaseSync
+    }
+    this.#db = new DatabaseSync(opts?.location ?? ':memory:')
+
+    this.#db.exec(`
+      PRAGMA journal_mode = WAL;
+      PRAGMA synchronous = NORMAL;
+      PRAGMA temp_store = memory;
+      PRAGMA optimize;
+
+      CREATE TABLE IF NOT EXISTS cacheInterceptorV${VERSION} (
+        -- Data specific to us
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        url TEXT NOT NULL,
+        method TEXT NOT NULL,
+
+        -- Data returned to the interceptor
+        body BUF NULL,
+        deleteAt INTEGER NOT NULL,
+        statusCode INTEGER NOT NULL,
+        statusMessage TEXT NOT NULL,
+        headers TEXT NULL,
+        cacheControlDirectives TEXT NULL,
+        etag TEXT NULL,
+        vary TEXT NULL,
+        cachedAt INTEGER NOT NULL,
+        staleAt INTEGER NOT NULL
+      );
+
+      CREATE INDEX IF NOT EXISTS idx_cacheInterceptorV${VERSION}_getValuesQuery ON cacheInterceptorV${VERSION}(url, method, deleteAt);
+      CREATE INDEX IF NOT EXISTS idx_cacheInterceptorV${VERSION}_deleteByUrlQuery ON cacheInterceptorV${VERSION}(deleteAt);
+    `)
+
+    this.#getValuesQuery = this.#db.prepare(`
+      SELECT
+        id,
+        body,
+        deleteAt,
+        statusCode,
+        statusMessage,
+        headers,
+        etag,
+        cacheControlDirectives,
+        vary,
+        cachedAt,
+        staleAt
+      FROM cacheInterceptorV${VERSION}
+      WHERE
+        url = ?
+        AND method = ?
+      ORDER BY
+        deleteAt ASC
+    `)
+
+    this.#updateValueQuery = this.#db.prepare(`
+      UPDATE cacheInterceptorV${VERSION} SET
+        body = ?,
+        deleteAt = ?,
+        statusCode = ?,
+        statusMessage = ?,
+        headers = ?,
+        etag = ?,
+        cacheControlDirectives = ?,
+        cachedAt = ?,
+        staleAt = ?
+      WHERE
+        id = ?
+    `)
+
+    this.#insertValueQuery = this.#db.prepare(`
+      INSERT INTO cacheInterceptorV${VERSION} (
+        url,
+        method,
+        body,
+        deleteAt,
+        statusCode,
+        statusMessage,
+        headers,
+        etag,
+        cacheControlDirectives,
+        vary,
+        cachedAt,
+        staleAt
+      ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+    `)
+
+    this.#deleteByUrlQuery = this.#db.prepare(
+      `DELETE FROM cacheInterceptorV${VERSION} WHERE url = ?`
+    )
+
+    this.#countEntriesQuery = this.#db.prepare(
+      `SELECT COUNT(*) AS total FROM cacheInterceptorV${VERSION}`
+    )
+
+    this.#deleteExpiredValuesQuery = this.#db.prepare(
+      `DELETE FROM cacheInterceptorV${VERSION} WHERE deleteAt <= ?`
+    )
+
+    this.#deleteOldValuesQuery = this.#maxCount === Infinity
+      ? null
+      : this.#db.prepare(`
+        DELETE FROM cacheInterceptorV${VERSION}
+        WHERE id IN (
+          SELECT
+            id
+          FROM cacheInterceptorV${VERSION}
+          ORDER BY cachedAt DESC
+          LIMIT ?
+        )
+      `)
+  }
+
+  close () {
+    this.#db.close()
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   * @returns {(import('../../types/cache-interceptor.d.ts').default.GetResult & { body?: Buffer }) | undefined}
+   */
+  get (key) {
+    assertCacheKey(key)
+
+    const value = this.#findValue(key)
+    return value
+      ? {
+          body: value.body ? Buffer.from(value.body.buffer, value.body.byteOffset, value.body.byteLength) : undefined,
+          statusCode: value.statusCode,
+          statusMessage: value.statusMessage,
+          headers: value.headers ? JSON.parse(value.headers) : undefined,
+          etag: value.etag ? value.etag : undefined,
+          vary: value.vary ? JSON.parse(value.vary) : undefined,
+          cacheControlDirectives: value.cacheControlDirectives
+            ? JSON.parse(value.cacheControlDirectives)
+            : undefined,
+          cachedAt: value.cachedAt,
+          staleAt: value.staleAt,
+          deleteAt: value.deleteAt
+        }
+      : undefined
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheValue & { body: null | Buffer | Array<Buffer>}} value
+   */
+  set (key, value) {
+    assertCacheKey(key)
+
+    const url = this.#makeValueUrl(key)
+    const body = Array.isArray(value.body) ? Buffer.concat(value.body) : value.body
+    const size = body?.byteLength
+
+    if (size && size > this.#maxEntrySize) {
+      return
+    }
+
+    const existingValue = this.#findValue(key, true)
+    if (existingValue) {
+      // Updating an existing response, let's overwrite it
+      this.#updateValueQuery.run(
+        body,
+        value.deleteAt,
+        value.statusCode,
+        value.statusMessage,
+        value.headers ? JSON.stringify(value.headers) : null,
+        value.etag ? value.etag : null,
+        value.cacheControlDirectives ? JSON.stringify(value.cacheControlDirectives) : null,
+        value.cachedAt,
+        value.staleAt,
+        existingValue.id
+      )
+    } else {
+      this.#prune()
+      // New response, let's insert it
+      this.#insertValueQuery.run(
+        url,
+        key.method,
+        body,
+        value.deleteAt,
+        value.statusCode,
+        value.statusMessage,
+        value.headers ? JSON.stringify(value.headers) : null,
+        value.etag ? value.etag : null,
+        value.cacheControlDirectives ? JSON.stringify(value.cacheControlDirectives) : null,
+        value.vary ? JSON.stringify(value.vary) : null,
+        value.cachedAt,
+        value.staleAt
+      )
+    }
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheValue} value
+   * @returns {Writable | undefined}
+   */
+  createWriteStream (key, value) {
+    assertCacheKey(key)
+    assertCacheValue(value)
+
+    let size = 0
+    /**
+     * @type {Buffer[] | null}
+     */
+    const body = []
+    const store = this
+
+    return new Writable({
+      decodeStrings: true,
+      write (chunk, encoding, callback) {
+        size += chunk.byteLength
+
+        if (size < store.#maxEntrySize) {
+          body.push(chunk)
+        } else {
+          this.destroy()
+        }
+
+        callback()
+      },
+      final (callback) {
+        store.set(key, { ...value, body })
+        callback()
+      }
+    })
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   */
+  delete (key) {
+    if (typeof key !== 'object') {
+      throw new TypeError(`expected key to be object, got ${typeof key}`)
+    }
+
+    this.#deleteByUrlQuery.run(this.#makeValueUrl(key))
+  }
+
+  #prune () {
+    if (Number.isFinite(this.#maxCount) && this.size <= this.#maxCount) {
+      return 0
+    }
+
+    {
+      const removed = this.#deleteExpiredValuesQuery.run(Date.now()).changes
+      if (removed) {
+        return removed
+      }
+    }
+
+    {
+      const removed = this.#deleteOldValuesQuery?.run(Math.max(Math.floor(this.#maxCount * 0.1), 1)).changes
+      if (removed) {
+        return removed
+      }
+    }
+
+    return 0
+  }
+
+  /**
+   * Counts the number of rows in the cache
+   * @returns {Number}
+   */
+  get size () {
+    const { total } = this.#countEntriesQuery.get()
+    return total
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   * @returns {string}
+   */
+  #makeValueUrl (key) {
+    return `${key.origin}/${key.path}`
+  }
+
+  /**
+   * @param {import('../../types/cache-interceptor.d.ts').default.CacheKey} key
+   * @param {boolean} [canBeExpired=false]
+   * @returns {SqliteStoreValue | undefined}
+   */
+  #findValue (key, canBeExpired = false) {
+    const url = this.#makeValueUrl(key)
+    const { headers, method } = key
+
+    /**
+     * @type {SqliteStoreValue[]}
+     */
+    const values = this.#getValuesQuery.all(url, method)
+
+    if (values.length === 0) {
+      return undefined
+    }
+
+    const now = Date.now()
+    for (const value of values) {
+      if (now >= value.deleteAt && !canBeExpired) {
+        return undefined
+      }
+
+      let matches = true
+
+      if (value.vary) {
+        const vary = JSON.parse(value.vary)
+
+        for (const header in vary) {
+          if (!headerValueEquals(headers[header], vary[header])) {
+            matches = false
+            break
+          }
+        }
+      }
+
+      if (matches) {
+        return value
+      }
+    }
+
+    return undefined
+  }
+}
+
+/**
+ * @param {string|string[]|null|undefined} lhs
+ * @param {string|string[]|null|undefined} rhs
+ * @returns {boolean}
+ */
+function headerValueEquals (lhs, rhs) {
+  if (lhs == null && rhs == null) {
+    return true
+  }
+
+  if ((lhs == null && rhs != null) ||
+      (lhs != null && rhs == null)) {
+    return false
+  }
+
+  if (Array.isArray(lhs) && Array.isArray(rhs)) {
+    if (lhs.length !== rhs.length) {
+      return false
+    }
+
+    return lhs.every((x, i) => x === rhs[i])
+  }
+
+  return lhs === rhs
+}