1 files changed, 106 insertions, 0 deletions
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()
+})