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

1 files changed, 229 insertions, 0 deletions

diff --git a/vanilla/node_modules/undici/lib/web/infra/index.js b/vanilla/node_modules/undici/lib/web/infra/index.js
new file mode 100644
index 0000000..391bb2e
--- /dev/null
+++ b/vanilla/node_modules/undici/lib/web/infra/index.js
@@ -0,0 +1,229 @@
+'use strict'
+
+const assert = require('node:assert')
+const { utf8DecodeBytes } = require('../../encoding')
+
+/**
+ * @param {(char: string) => boolean} condition
+ * @param {string} input
+ * @param {{ position: number }} position
+ * @returns {string}
+ *
+ * @see https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points
+ */
+function collectASequenceOfCodePoints (condition, input, position) {
+  // 1. Let result be the empty string.
+  let result = ''
+
+  // 2. While position doesn’t point past the end of input and the
+  // code point at position within input meets the condition condition:
+  while (position.position < input.length && condition(input[position.position])) {
+    // 1. Append that code point to the end of result.
+    result += input[position.position]
+
+    // 2. Advance position by 1.
+    position.position++
+  }
+
+  // 3. Return result.
+  return result
+}
+
+/**
+ * A faster collectASequenceOfCodePoints that only works when comparing a single character.
+ * @param {string} char
+ * @param {string} input
+ * @param {{ position: number }} position
+ * @returns {string}
+ *
+ * @see https://infra.spec.whatwg.org/#collect-a-sequence-of-code-points
+ */
+function collectASequenceOfCodePointsFast (char, input, position) {
+  const idx = input.indexOf(char, position.position)
+  const start = position.position
+
+  if (idx === -1) {
+    position.position = input.length
+    return input.slice(start)
+  }
+
+  position.position = idx
+  return input.slice(start, position.position)
+}
+
+const ASCII_WHITESPACE_REPLACE_REGEX = /[\u0009\u000A\u000C\u000D\u0020]/g // eslint-disable-line no-control-regex
+
+/**
+ * @param {string} data
+ * @returns {Uint8Array | 'failure'}
+ *
+ * @see https://infra.spec.whatwg.org/#forgiving-base64-decode
+ */
+function forgivingBase64 (data) {
+  // 1. Remove all ASCII whitespace from data.
+  data = data.replace(ASCII_WHITESPACE_REPLACE_REGEX, '')
+
+  let dataLength = data.length
+  // 2. If data’s code point length divides by 4 leaving
+  // no remainder, then:
+  if (dataLength % 4 === 0) {
+    // 1. If data ends with one or two U+003D (=) code points,
+    // then remove them from data.
+    if (data.charCodeAt(dataLength - 1) === 0x003D) {
+      --dataLength
+      if (data.charCodeAt(dataLength - 1) === 0x003D) {
+        --dataLength
+      }
+    }
+  }
+
+  // 3. If data’s code point length divides by 4 leaving
+  // a remainder of 1, then return failure.
+  if (dataLength % 4 === 1) {
+    return 'failure'
+  }
+
+  // 4. If data contains a code point that is not one of
+  //  U+002B (+)
+  //  U+002F (/)
+  //  ASCII alphanumeric
+  // then return failure.
+  if (/[^+/0-9A-Za-z]/.test(data.length === dataLength ? data : data.substring(0, dataLength))) {
+    return 'failure'
+  }
+
+  const buffer = Buffer.from(data, 'base64')
+  return new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength)
+}
+
+/**
+ * @param {number} char
+ * @returns {boolean}
+ *
+ * @see https://infra.spec.whatwg.org/#ascii-whitespace
+ */
+function isASCIIWhitespace (char) {
+  return (
+    char === 0x09 || // \t
+    char === 0x0a || // \n
+    char === 0x0c || // \f
+    char === 0x0d || // \r
+    char === 0x20    // space
+  )
+}
+
+/**
+ * @param {Uint8Array} input
+ * @returns {string}
+ *
+ * @see https://infra.spec.whatwg.org/#isomorphic-decode
+ */
+function isomorphicDecode (input) {
+  // 1. To isomorphic decode a byte sequence input, return a string whose code point
+  //    length is equal to input’s length and whose code points have the same values
+  //    as the values of input’s bytes, in the same order.
+  const length = input.length
+  if ((2 << 15) - 1 > length) {
+    return String.fromCharCode.apply(null, input)
+  }
+  let result = ''
+  let i = 0
+  let addition = (2 << 15) - 1
+  while (i < length) {
+    if (i + addition > length) {
+      addition = length - i
+    }
+    result += String.fromCharCode.apply(null, input.subarray(i, i += addition))
+  }
+  return result
+}
+
+const invalidIsomorphicEncodeValueRegex = /[^\x00-\xFF]/ // eslint-disable-line no-control-regex
+
+/**
+ * @param {string} input
+ * @returns {string}
+ *
+ * @see https://infra.spec.whatwg.org/#isomorphic-encode
+ */
+function isomorphicEncode (input) {
+  // 1. Assert: input contains no code points greater than U+00FF.
+  assert(!invalidIsomorphicEncodeValueRegex.test(input))
+
+  // 2. Return a byte sequence whose length is equal to input’s code
+  //    point length and whose bytes have the same values as the
+  //    values of input’s code points, in the same order
+  return input
+}
+
+/**
+ * @see https://infra.spec.whatwg.org/#parse-json-bytes-to-a-javascript-value
+ * @param {Uint8Array} bytes
+ */
+function parseJSONFromBytes (bytes) {
+  return JSON.parse(utf8DecodeBytes(bytes))
+}
+
+/**
+ * @param {string} str
+ * @param {boolean} [leading=true]
+ * @param {boolean} [trailing=true]
+ * @returns {string}
+ *
+ * @see https://infra.spec.whatwg.org/#strip-leading-and-trailing-ascii-whitespace
+ */
+function removeASCIIWhitespace (str, leading = true, trailing = true) {
+  return removeChars(str, leading, trailing, isASCIIWhitespace)
+}
+
+/**
+ * @param {string} str
+ * @param {boolean} leading
+ * @param {boolean} trailing
+ * @param {(charCode: number) => boolean} predicate
+ * @returns {string}
+ */
+function removeChars (str, leading, trailing, predicate) {
+  let lead = 0
+  let trail = str.length - 1
+
+  if (leading) {
+    while (lead < str.length && predicate(str.charCodeAt(lead))) lead++
+  }
+
+  if (trailing) {
+    while (trail > 0 && predicate(str.charCodeAt(trail))) trail--
+  }
+
+  return lead === 0 && trail === str.length - 1 ? str : str.slice(lead, trail + 1)
+}
+
+// https://infra.spec.whatwg.org/#serialize-a-javascript-value-to-a-json-string
+function serializeJavascriptValueToJSONString (value) {
+  // 1. Let result be ? Call(%JSON.stringify%, undefined, « value »).
+  const result = JSON.stringify(value)
+
+  // 2. If result is undefined, then throw a TypeError.
+  if (result === undefined) {
+    throw new TypeError('Value is not JSON serializable')
+  }
+
+  // 3. Assert: result is a string.
+  assert(typeof result === 'string')
+
+  // 4. Return result.
+  return result
+}
+
+module.exports = {
+  collectASequenceOfCodePoints,
+  collectASequenceOfCodePointsFast,
+  forgivingBase64,
+  isASCIIWhitespace,
+  isomorphicDecode,
+  isomorphicEncode,
+  parseJSONFromBytes,
+  removeASCIIWhitespace,
+  removeChars,
+  serializeJavascriptValueToJSONString
+}