3 files changed, 383 insertions, 0 deletions
diff --git a/test/webidl/converters.js b/test/webidl/converters.js
new file mode 100644
index 0000000..95bea88
--- /dev/null
+++ b/test/webidl/converters.js
@@ -0,0 +1,202 @@
+'use strict'
+
+const { test } = require('tap')
+const { webidl } = require('../../lib/fetch/webidl')
+
+test('sequence', (t) => {
+  const converter = webidl.sequenceConverter(
+    webidl.converters.DOMString
+  )
+
+  t.same(converter([1, 2, 3]), ['1', '2', '3'])
+
+  t.throws(() => {
+    converter(3)
+  }, TypeError, 'disallows non-objects')
+
+  t.throws(() => {
+    converter(null)
+  }, TypeError)
+
+  t.throws(() => {
+    converter(undefined)
+  }, TypeError)
+
+  t.throws(() => {
+    converter({})
+  }, TypeError, 'no Symbol.iterator')
+
+  t.throws(() => {
+    converter({
+      [Symbol.iterator]: 42
+    })
+  }, TypeError, 'invalid Symbol.iterator')
+
+  t.throws(() => {
+    converter(webidl.converters.sequence({
+      [Symbol.iterator] () {
+        return {
+          next: 'never!'
+        }
+      }
+    }))
+  }, TypeError, 'invalid generator')
+
+  t.end()
+})
+
+test('webidl.dictionaryConverter', (t) => {
+  t.test('arguments', (t) => {
+    const converter = webidl.dictionaryConverter([])
+
+    t.throws(() => {
+      converter(true)
+    }, TypeError)
+
+    for (const value of [{}, undefined, null]) {
+      t.doesNotThrow(() => {
+        converter(value)
+      })
+    }
+
+    t.end()
+  })
+
+  t.test('required key', (t) => {
+    const converter = webidl.dictionaryConverter([
+      {
+        converter: () => true,
+        key: 'Key',
+        required: true
+      }
+    ])
+
+    t.throws(() => {
+      converter({ wrongKey: 'key' })
+    }, TypeError)
+
+    t.doesNotThrow(() => {
+      converter({ Key: 'this key was required!' })
+    })
+
+    t.end()
+  })
+
+  t.end()
+})
+
+test('ArrayBuffer', (t) => {
+  t.throws(() => {
+    webidl.converters.ArrayBuffer(true)
+  }, TypeError)
+
+  t.throws(() => {
+    webidl.converters.ArrayBuffer({})
+  }, TypeError)
+
+  t.throws(() => {
+    const sab = new SharedArrayBuffer(1024)
+    webidl.converters.ArrayBuffer(sab, { allowShared: false })
+  }, TypeError)
+
+  t.doesNotThrow(() => {
+    const sab = new SharedArrayBuffer(1024)
+    webidl.converters.ArrayBuffer(sab)
+  })
+
+  t.doesNotThrow(() => {
+    const ab = new ArrayBuffer(8)
+    webidl.converters.ArrayBuffer(ab)
+  })
+
+  t.end()
+})
+
+test('TypedArray', (t) => {
+  t.throws(() => {
+    webidl.converters.TypedArray(3)
+  }, TypeError)
+
+  t.throws(() => {
+    webidl.converters.TypedArray({})
+  }, TypeError)
+
+  t.throws(() => {
+    const uint8 = new Uint8Array([1, 2, 3])
+    Object.defineProperty(uint8, 'buffer', {
+      get () {
+        return new SharedArrayBuffer(8)
+      }
+    })
+
+    webidl.converters.TypedArray(uint8, Uint8Array, {
+      allowShared: false
+    })
+  }, TypeError)
+
+  t.end()
+})
+
+test('DataView', (t) => {
+  t.throws(() => {
+    webidl.converters.DataView(3)
+  }, TypeError)
+
+  t.throws(() => {
+    webidl.converters.DataView({})
+  }, TypeError)
+
+  t.throws(() => {
+    const buffer = new ArrayBuffer(16)
+    const view = new DataView(buffer, 0)
+
+    Object.defineProperty(view, 'buffer', {
+      get () {
+        return new SharedArrayBuffer(8)
+      }
+    })
+
+    webidl.converters.DataView(view, {
+      allowShared: false
+    })
+  })
+
+  const buffer = new ArrayBuffer(16)
+  const view = new DataView(buffer, 0)
+
+  t.equal(webidl.converters.DataView(view), view)
+
+  t.end()
+})
+
+test('BufferSource', (t) => {
+  t.doesNotThrow(() => {
+    const buffer = new ArrayBuffer(16)
+    const view = new DataView(buffer, 0)
+
+    webidl.converters.BufferSource(view)
+  })
+
+  t.throws(() => {
+    webidl.converters.BufferSource(3)
+  }, TypeError)
+
+  t.end()
+})
+
+test('ByteString', (t) => {
+  t.doesNotThrow(() => {
+    webidl.converters.ByteString('')
+  })
+
+  // https://github.com/nodejs/undici/issues/1590
+  t.throws(() => {
+    const char = String.fromCharCode(256)
+    webidl.converters.ByteString(`invalid${char}char`)
+  }, {
+    message: 'Cannot convert argument to a ByteString because the character at ' +
+             'index 7 has a value of 256 which is greater than 255.'
+  })
+
+  t.end()
+})
diff --git a/test/webidl/helpers.js b/test/webidl/helpers.js
new file mode 100644
index 0000000..f44d501
--- /dev/null
+++ b/test/webidl/helpers.js
@@ -0,0 +1,75 @@
+'use strict'
+
+const { test } = require('tap')
+const { webidl } = require('../../lib/fetch/webidl')
+
+test('webidl.interfaceConverter', (t) => {
+  class A {}
+  class B {}
+
+  const converter = webidl.interfaceConverter(A)
+
+  t.throws(() => {
+    converter(new B())
+  }, TypeError)
+
+  t.doesNotThrow(() => {
+    converter(new A())
+  })
+
+  t.end()
+})
+
+test('webidl.dictionaryConverter', (t) => {
+  t.test('extraneous keys are provided', (t) => {
+    const converter = webidl.dictionaryConverter([
+      {
+        key: 'key',
+        converter: webidl.converters.USVString,
+        defaultValue: 420,
+        required: true
+      }
+    ])
+
+    t.same(
+      converter({
+        a: 'b',
+        key: 'string',
+        c: 'd',
+        get value () {
+          return 6
+        }
+      }),
+      { key: 'string' }
+    )
+
+    t.end()
+  })
+
+  t.test('defaultValue with key = null', (t) => {
+    const converter = webidl.dictionaryConverter([
+      {
+        key: 'key',
+        converter: webidl.converters['unsigned short'],
+        defaultValue: 200
+      }
+    ])
+
+    t.same(converter({ key: null }), { key: 0 })
+    t.end()
+  })
+
+  t.test('no defaultValue and optional', (t) => {
+    const converter = webidl.dictionaryConverter([
+      {
+        key: 'key',
+        converter: webidl.converters.ByteString
+      }
+    ])
+
+    t.same(converter({ a: 'b', c: 'd' }), {})
+    t.end()
+  })
+
+  t.end()
+})
diff --git a/test/webidl/util.js b/test/webidl/util.js
new file mode 100644
index 0000000..c451590
--- /dev/null
+++ b/test/webidl/util.js
@@ -0,0 +1,106 @@
+'use strict'
+
+const { test } = require('tap')
+const { webidl } = require('../../lib/fetch/webidl')
+
+test('Type(V)', (t) => {
+  const Type = webidl.util.Type
+
+  t.equal(Type(undefined), 'Undefined')
+  t.equal(Type(null), 'Null')
+  t.equal(Type(true), 'Boolean')
+  t.equal(Type('string'), 'String')
+  t.equal(Type(Symbol('symbol')), 'Symbol')
+  t.equal(Type(1.23), 'Number')
+  t.equal(Type(1n), 'BigInt')
+  t.equal(Type({ a: 'b' }), 'Object')
+
+  t.end()
+})
+
+test('ConvertToInt(V)', (t) => {
+  const ConvertToInt = webidl.util.ConvertToInt
+
+  t.equal(ConvertToInt(63, 64, 'signed'), 63, 'odd int')
+  t.equal(ConvertToInt(64.49, 64, 'signed'), 64)
+  t.equal(ConvertToInt(64.51, 64, 'signed'), 64)
+
+  const max = 2 ** 53
+  t.equal(ConvertToInt(max + 1, 64, 'signed'), max, 'signed pos')
+  t.equal(ConvertToInt(-max - 1, 64, 'signed'), -max, 'signed neg')
+
+  t.equal(ConvertToInt(max + 1, 64, 'unsigned'), max + 1, 'unsigned pos')
+  t.equal(ConvertToInt(-max - 1, 64, 'unsigned'), -max - 1, 'unsigned neg')
+
+  for (const signedness of ['signed', 'unsigned']) {
+    t.equal(ConvertToInt(Infinity, 64, signedness), 0)
+    t.equal(ConvertToInt(-Infinity, 64, signedness), 0)
+    t.equal(ConvertToInt(NaN, 64, signedness), 0)
+  }
+
+  for (const signedness of ['signed', 'unsigned']) {
+    t.throws(() => {
+      ConvertToInt(NaN, 64, signedness, {
+        enforceRange: true
+      })
+    }, TypeError)
+
+    t.throws(() => {
+      ConvertToInt(Infinity, 64, signedness, {
+        enforceRange: true
+      })
+    }, TypeError)
+
+    t.throws(() => {
+      ConvertToInt(-Infinity, 64, signedness, {
+        enforceRange: true
+      })
+    }, TypeError)
+
+    t.throws(() => {
+      ConvertToInt(2 ** 53 + 1, 32, 'signed', {
+        enforceRange: true
+      })
+    }, TypeError)
+
+    t.throws(() => {
+      ConvertToInt(-(2 ** 53 + 1), 32, 'unsigned', {
+        enforceRange: true
+      })
+    }, TypeError)
+
+    t.equal(
+      ConvertToInt(65.5, 64, signedness, {
+        enforceRange: true
+      }),
+      65
+    )
+  }
+
+  for (const signedness of ['signed', 'unsigned']) {
+    t.equal(
+      ConvertToInt(63.49, 64, signedness, {
+        clamp: true
+      }),
+      64
+    )
+
+    t.equal(
+      ConvertToInt(63.51, 64, signedness, {
+        clamp: true
+      }),
+      64
+    )
+
+    t.equal(
+      ConvertToInt(-0, 64, signedness, {
+        clamp: true
+      }),
+      0
+    )
+  }
+
+  t.equal(ConvertToInt(111, 2, 'signed'), -1)
+
+  t.end()
+})