1 files changed, 151 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-buffer-readdouble.js b/tests/node_compat/test/parallel/test-buffer-readdouble.js
new file mode 100644
index 000000000..f4ab9ba88
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-buffer-readdouble.js
@@ -0,0 +1,151 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+'use strict';
+
+require('../common');
+const assert = require('assert');
+
+// Test (64 bit) double
+const buffer = Buffer.allocUnsafe(8);
+
+buffer[0] = 0x55;
+buffer[1] = 0x55;
+buffer[2] = 0x55;
+buffer[3] = 0x55;
+buffer[4] = 0x55;
+buffer[5] = 0x55;
+buffer[6] = 0xd5;
+buffer[7] = 0x3f;
+assert.strictEqual(buffer.readDoubleBE(0), 1.1945305291680097e+103);
+assert.strictEqual(buffer.readDoubleLE(0), 0.3333333333333333);
+
+buffer[0] = 1;
+buffer[1] = 0;
+buffer[2] = 0;
+buffer[3] = 0;
+buffer[4] = 0;
+buffer[5] = 0;
+buffer[6] = 0xf0;
+buffer[7] = 0x3f;
+assert.strictEqual(buffer.readDoubleBE(0), 7.291122019655968e-304);
+assert.strictEqual(buffer.readDoubleLE(0), 1.0000000000000002);
+
+buffer[0] = 2;
+assert.strictEqual(buffer.readDoubleBE(0), 4.778309726801735e-299);
+assert.strictEqual(buffer.readDoubleLE(0), 1.0000000000000004);
+
+buffer[0] = 1;
+buffer[6] = 0;
+buffer[7] = 0;
+// eslint-disable-next-line no-loss-of-precision
+assert.strictEqual(buffer.readDoubleBE(0), 7.291122019556398e-304);
+assert.strictEqual(buffer.readDoubleLE(0), 5e-324);
+
+buffer[0] = 0xff;
+buffer[1] = 0xff;
+buffer[2] = 0xff;
+buffer[3] = 0xff;
+buffer[4] = 0xff;
+buffer[5] = 0xff;
+buffer[6] = 0x0f;
+buffer[7] = 0x00;
+assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
+assert.strictEqual(buffer.readDoubleLE(0), 2.225073858507201e-308);
+
+buffer[6] = 0xef;
+buffer[7] = 0x7f;
+assert.ok(Number.isNaN(buffer.readDoubleBE(0)));
+assert.strictEqual(buffer.readDoubleLE(0), 1.7976931348623157e+308);
+
+buffer[0] = 0;
+buffer[1] = 0;
+buffer[2] = 0;
+buffer[3] = 0;
+buffer[4] = 0;
+buffer[5] = 0;
+buffer[6] = 0xf0;
+buffer[7] = 0x3f;
+assert.strictEqual(buffer.readDoubleBE(0), 3.03865e-319);
+assert.strictEqual(buffer.readDoubleLE(0), 1);
+
+buffer[6] = 0;
+buffer[7] = 0x40;
+assert.strictEqual(buffer.readDoubleBE(0), 3.16e-322);
+assert.strictEqual(buffer.readDoubleLE(0), 2);
+
+buffer[7] = 0xc0;
+assert.strictEqual(buffer.readDoubleBE(0), 9.5e-322);
+assert.strictEqual(buffer.readDoubleLE(0), -2);
+
+buffer[6] = 0x10;
+buffer[7] = 0;
+assert.strictEqual(buffer.readDoubleBE(0), 2.0237e-320);
+assert.strictEqual(buffer.readDoubleLE(0), 2.2250738585072014e-308);
+
+buffer[6] = 0;
+assert.strictEqual(buffer.readDoubleBE(0), 0);
+assert.strictEqual(buffer.readDoubleLE(0), 0);
+assert.ok(1 / buffer.readDoubleLE(0) >= 0);
+
+buffer[7] = 0x80;
+assert.strictEqual(buffer.readDoubleBE(0), 6.3e-322);
+assert.strictEqual(buffer.readDoubleLE(0), -0);
+assert.ok(1 / buffer.readDoubleLE(0) < 0);
+
+buffer[6] = 0xf0;
+buffer[7] = 0x7f;
+assert.strictEqual(buffer.readDoubleBE(0), 3.0418e-319);
+assert.strictEqual(buffer.readDoubleLE(0), Infinity);
+
+buffer[7] = 0xff;
+assert.strictEqual(buffer.readDoubleBE(0), 3.04814e-319);
+assert.strictEqual(buffer.readDoubleLE(0), -Infinity);
+
+['readDoubleLE', 'readDoubleBE'].forEach((fn) => {
+
+  // Verify that default offset works fine.
+  buffer[fn](undefined);
+  buffer[fn]();
+
+  ['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
+    assert.throws(
+      () => buffer[fn](off),
+      { code: 'ERR_INVALID_ARG_TYPE' }
+    );
+  });
+
+  [Infinity, -1, 1].forEach((offset) => {
+    assert.throws(
+      () => buffer[fn](offset),
+      {
+        code: 'ERR_OUT_OF_RANGE',
+        name: 'RangeError',
+        message: 'The value of "offset" is out of range. ' +
+                 `It must be >= 0 and <= 0. Received ${offset}`
+      });
+  });
+
+  assert.throws(
+    () => Buffer.alloc(1)[fn](1),
+    {
+      code: 'ERR_BUFFER_OUT_OF_BOUNDS',
+      name: 'RangeError',
+      message: 'Attempt to access memory outside buffer bounds'
+    });
+
+  [NaN, 1.01].forEach((offset) => {
+    assert.throws(
+      () => buffer[fn](offset),
+      {
+        code: 'ERR_OUT_OF_RANGE',
+        name: 'RangeError',
+        message: 'The value of "offset" is out of range. ' +
+                 `It must be an integer. Received ${offset}`
+      });
+  });
+});