1 files changed, 602 insertions, 0 deletions
diff --git a/addon-sdk/source/test/buffers/test-write-types.js b/addon-sdk/source/test/buffers/test-write-types.js
new file mode 100644
index 000000000..f7872aaaa
--- /dev/null
+++ b/addon-sdk/source/test/buffers/test-write-types.js
@@ -0,0 +1,602 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+const { Buffer } = require('sdk/io/buffer');
+
+exports.testWriteDouble = helper('writeDoubleBE/writeDoubleLE', function (assert) {
+  var buffer = new Buffer(16);
+
+  buffer.writeDoubleBE(2.225073858507201e-308, 0);
+  buffer.writeDoubleLE(2.225073858507201e-308, 8);
+  assert.equal(0x00, buffer[0]);
+  assert.equal(0x0f, buffer[1]);
+  assert.equal(0xff, buffer[2]);
+  assert.equal(0xff, buffer[3]);
+  assert.equal(0xff, buffer[4]);
+  assert.equal(0xff, buffer[5]);
+  assert.equal(0xff, buffer[6]);
+  assert.equal(0xff, buffer[7]);
+  assert.equal(0xff, buffer[8]);
+  assert.equal(0xff, buffer[9]);
+  assert.equal(0xff, buffer[10]);
+  assert.equal(0xff, buffer[11]);
+  assert.equal(0xff, buffer[12]);
+  assert.equal(0xff, buffer[13]);
+  assert.equal(0x0f, buffer[14]);
+  assert.equal(0x00, buffer[15]);
+
+  buffer.writeDoubleBE(1.0000000000000004, 0);
+  buffer.writeDoubleLE(1.0000000000000004, 8);
+  assert.equal(0x3f, buffer[0]);
+  assert.equal(0xf0, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x02, buffer[7]);
+  assert.equal(0x02, buffer[8]);
+  assert.equal(0x00, buffer[9]);
+  assert.equal(0x00, buffer[10]);
+  assert.equal(0x00, buffer[11]);
+  assert.equal(0x00, buffer[12]);
+  assert.equal(0x00, buffer[13]);
+  assert.equal(0xf0, buffer[14]);
+  assert.equal(0x3f, buffer[15]);
+
+  buffer.writeDoubleBE(-2, 0);
+  buffer.writeDoubleLE(-2, 8);
+  assert.equal(0xc0, buffer[0]);
+  assert.equal(0x00, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+  assert.equal(0x00, buffer[8]);
+  assert.equal(0x00, buffer[9]);
+  assert.equal(0x00, buffer[10]);
+  assert.equal(0x00, buffer[11]);
+  assert.equal(0x00, buffer[12]);
+  assert.equal(0x00, buffer[13]);
+  assert.equal(0x00, buffer[14]);
+  assert.equal(0xc0, buffer[15]);
+
+  buffer.writeDoubleBE(1.7976931348623157e+308, 0);
+  buffer.writeDoubleLE(1.7976931348623157e+308, 8);
+  assert.equal(0x7f, buffer[0]);
+  assert.equal(0xef, buffer[1]);
+  assert.equal(0xff, buffer[2]);
+  assert.equal(0xff, buffer[3]);
+  assert.equal(0xff, buffer[4]);
+  assert.equal(0xff, buffer[5]);
+  assert.equal(0xff, buffer[6]);
+  assert.equal(0xff, buffer[7]);
+  assert.equal(0xff, buffer[8]);
+  assert.equal(0xff, buffer[9]);
+  assert.equal(0xff, buffer[10]);
+  assert.equal(0xff, buffer[11]);
+  assert.equal(0xff, buffer[12]);
+  assert.equal(0xff, buffer[13]);
+  assert.equal(0xef, buffer[14]);
+  assert.equal(0x7f, buffer[15]);
+
+  buffer.writeDoubleBE(0 * -1, 0);
+  buffer.writeDoubleLE(0 * -1, 8);
+  assert.equal(0x80, buffer[0]);
+  assert.equal(0x00, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+  assert.equal(0x00, buffer[8]);
+  assert.equal(0x00, buffer[9]);
+  assert.equal(0x00, buffer[10]);
+  assert.equal(0x00, buffer[11]);
+  assert.equal(0x00, buffer[12]);
+  assert.equal(0x00, buffer[13]);
+  assert.equal(0x00, buffer[14]);
+  assert.equal(0x80, buffer[15]);
+
+  buffer.writeDoubleBE(Infinity, 0);
+  buffer.writeDoubleLE(Infinity, 8);
+  assert.equal(0x7F, buffer[0]);
+  assert.equal(0xF0, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+  assert.equal(0x00, buffer[8]);
+  assert.equal(0x00, buffer[9]);
+  assert.equal(0x00, buffer[10]);
+  assert.equal(0x00, buffer[11]);
+  assert.equal(0x00, buffer[12]);
+  assert.equal(0x00, buffer[13]);
+  assert.equal(0xF0, buffer[14]);
+  assert.equal(0x7F, buffer[15]);
+  assert.equal(Infinity, buffer.readDoubleBE(0));
+  assert.equal(Infinity, buffer.readDoubleLE(8));
+
+  buffer.writeDoubleBE(-Infinity, 0);
+  buffer.writeDoubleLE(-Infinity, 8);
+  assert.equal(0xFF, buffer[0]);
+  assert.equal(0xF0, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+  assert.equal(0x00, buffer[8]);
+  assert.equal(0x00, buffer[9]);
+  assert.equal(0x00, buffer[10]);
+  assert.equal(0x00, buffer[11]);
+  assert.equal(0x00, buffer[12]);
+  assert.equal(0x00, buffer[13]);
+  assert.equal(0xF0, buffer[14]);
+  assert.equal(0xFF, buffer[15]);
+  assert.equal(-Infinity, buffer.readDoubleBE(0));
+  assert.equal(-Infinity, buffer.readDoubleLE(8));
+
+  buffer.writeDoubleBE(NaN, 0);
+  buffer.writeDoubleLE(NaN, 8);
+  // Darwin ia32 does the other kind of NaN.
+  // Compiler bug.  No one really cares.
+  assert.ok(0x7F === buffer[0] || 0xFF === buffer[0]);
+  assert.equal(0xF8, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+  assert.equal(0x00, buffer[8]);
+  assert.equal(0x00, buffer[9]);
+  assert.equal(0x00, buffer[10]);
+  assert.equal(0x00, buffer[11]);
+  assert.equal(0x00, buffer[12]);
+  assert.equal(0x00, buffer[13]);
+  assert.equal(0xF8, buffer[14]);
+  // Darwin ia32 does the other kind of NaN.
+  // Compiler bug.  No one really cares.
+  assert.ok(0x7F === buffer[15] || 0xFF === buffer[15]);
+  assert.ok(isNaN(buffer.readDoubleBE(0)));
+  assert.ok(isNaN(buffer.readDoubleLE(8)));
+});
+
+exports.testWriteFloat = helper('writeFloatBE/writeFloatLE', function (assert) {
+  var buffer = new Buffer(8);
+
+  buffer.writeFloatBE(1, 0);
+  buffer.writeFloatLE(1, 4);
+  assert.equal(0x3f, buffer[0]);
+  assert.equal(0x80, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x80, buffer[6]);
+  assert.equal(0x3f, buffer[7]);
+
+  buffer.writeFloatBE(1 / 3, 0);
+  buffer.writeFloatLE(1 / 3, 4);
+  assert.equal(0x3e, buffer[0]);
+  assert.equal(0xaa, buffer[1]);
+  assert.equal(0xaa, buffer[2]);
+  assert.equal(0xab, buffer[3]);
+  assert.equal(0xab, buffer[4]);
+  assert.equal(0xaa, buffer[5]);
+  assert.equal(0xaa, buffer[6]);
+  assert.equal(0x3e, buffer[7]);
+
+  buffer.writeFloatBE(3.4028234663852886e+38, 0);
+  buffer.writeFloatLE(3.4028234663852886e+38, 4);
+  assert.equal(0x7f, buffer[0]);
+  assert.equal(0x7f, buffer[1]);
+  assert.equal(0xff, buffer[2]);
+  assert.equal(0xff, buffer[3]);
+  assert.equal(0xff, buffer[4]);
+  assert.equal(0xff, buffer[5]);
+  assert.equal(0x7f, buffer[6]);
+  assert.equal(0x7f, buffer[7]);
+
+  buffer.writeFloatLE(1.1754943508222875e-38, 0);
+  buffer.writeFloatBE(1.1754943508222875e-38, 4);
+  assert.equal(0x00, buffer[0]);
+  assert.equal(0x00, buffer[1]);
+  assert.equal(0x80, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x80, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+
+  buffer.writeFloatBE(0 * -1, 0);
+  buffer.writeFloatLE(0 * -1, 4);
+  assert.equal(0x80, buffer[0]);
+  assert.equal(0x00, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x80, buffer[7]);
+
+  buffer.writeFloatBE(Infinity, 0);
+  buffer.writeFloatLE(Infinity, 4);
+  assert.equal(0x7F, buffer[0]);
+  assert.equal(0x80, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x80, buffer[6]);
+  assert.equal(0x7F, buffer[7]);
+  assert.equal(Infinity, buffer.readFloatBE(0));
+  assert.equal(Infinity, buffer.readFloatLE(4));
+
+  buffer.writeFloatBE(-Infinity, 0);
+  buffer.writeFloatLE(-Infinity, 4);
+  // Darwin ia32 does the other kind of NaN.
+  // Compiler bug.  No one really cares.
+  assert.ok(0xFF === buffer[0] || 0x7F === buffer[0]);
+  assert.equal(0x80, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x80, buffer[6]);
+  assert.equal(0xFF, buffer[7]);
+  assert.equal(-Infinity, buffer.readFloatBE(0));
+  assert.equal(-Infinity, buffer.readFloatLE(4));
+
+  buffer.writeFloatBE(NaN, 0);
+  buffer.writeFloatLE(NaN, 4);
+  // Darwin ia32 does the other kind of NaN.
+  // Compiler bug.  No one really cares.
+  assert.ok(0x7F === buffer[0] || 0xFF === buffer[0]);
+  assert.equal(0xc0, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0xc0, buffer[6]);
+  // Darwin ia32 does the other kind of NaN.
+  // Compiler bug.  No one really cares.
+  assert.ok(0x7F === buffer[7] || 0xFF === buffer[7]);
+  assert.ok(isNaN(buffer.readFloatBE(0)));
+  assert.ok(isNaN(buffer.readFloatLE(4)));
+});
+
+
+exports.testWriteInt8 = helper('writeInt8', function (assert) {
+  var buffer = new Buffer(2);
+
+  buffer.writeInt8(0x23, 0);
+  buffer.writeInt8(-5, 1);
+
+  assert.equal(0x23, buffer[0]);
+  assert.equal(0xfb, buffer[1]);
+
+  /* Make sure we handle truncation correctly */
+  assert.throws(function() {
+    buffer.writeInt8(0xabc, 0);
+  });
+  assert.throws(function() {
+    buffer.writeInt8(0xabc, 0);
+  });
+
+  /* Make sure we handle min/max correctly */
+  buffer.writeInt8(0x7f, 0);
+  buffer.writeInt8(-0x80, 1);
+
+  assert.equal(0x7f, buffer[0]);
+  assert.equal(0x80, buffer[1]);
+  assert.throws(function() {
+    buffer.writeInt8(0x7f + 1, 0);
+  });
+  assert.throws(function() {
+    buffer.writeInt8(-0x80 - 1, 0);
+  });
+});
+
+
+exports.testWriteInt16 = helper('writeInt16LE/writeInt16BE', function (assert) {
+  var buffer = new Buffer(6);
+
+  buffer.writeInt16BE(0x0023, 0);
+  buffer.writeInt16LE(0x0023, 2);
+  assert.equal(0x00, buffer[0]);
+  assert.equal(0x23, buffer[1]);
+  assert.equal(0x23, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+
+  buffer.writeInt16BE(-5, 0);
+  buffer.writeInt16LE(-5, 2);
+  assert.equal(0xff, buffer[0]);
+  assert.equal(0xfb, buffer[1]);
+  assert.equal(0xfb, buffer[2]);
+  assert.equal(0xff, buffer[3]);
+
+  buffer.writeInt16BE(-1679, 1);
+  buffer.writeInt16LE(-1679, 3);
+  assert.equal(0xf9, buffer[1]);
+  assert.equal(0x71, buffer[2]);
+  assert.equal(0x71, buffer[3]);
+  assert.equal(0xf9, buffer[4]);
+
+  /* Make sure we handle min/max correctly */
+  buffer.writeInt16BE(0x7fff, 0);
+  buffer.writeInt16BE(-0x8000, 2);
+  assert.equal(0x7f, buffer[0]);
+  assert.equal(0xff, buffer[1]);
+  assert.equal(0x80, buffer[2]);
+  assert.equal(0x00, buffer[3]);
+  assert.throws(function() {
+    buffer.writeInt16BE(0x7fff + 1, 0);
+  });
+  assert.throws(function() {
+    buffer.writeInt16BE(-0x8000 - 1, 0);
+  });
+
+  buffer.writeInt16LE(0x7fff, 0);
+  buffer.writeInt16LE(-0x8000, 2);
+  assert.equal(0xff, buffer[0]);
+  assert.equal(0x7f, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x80, buffer[3]);
+  assert.throws(function() {
+    buffer.writeInt16LE(0x7fff + 1, 0);
+  });
+  assert.throws(function() {
+    buffer.writeInt16LE(-0x8000 - 1, 0);
+  });
+});
+
+exports.testWriteInt32 = helper('writeInt32BE/writeInt32LE', function (assert) {
+  var buffer = new Buffer(8);
+
+  buffer.writeInt32BE(0x23, 0);
+  buffer.writeInt32LE(0x23, 4);
+  assert.equal(0x00, buffer[0]);
+  assert.equal(0x00, buffer[1]);
+  assert.equal(0x00, buffer[2]);
+  assert.equal(0x23, buffer[3]);
+  assert.equal(0x23, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+
+  buffer.writeInt32BE(-5, 0);
+  buffer.writeInt32LE(-5, 4);
+  assert.equal(0xff, buffer[0]);
+  assert.equal(0xff, buffer[1]);
+  assert.equal(0xff, buffer[2]);
+  assert.equal(0xfb, buffer[3]);
+  assert.equal(0xfb, buffer[4]);
+  assert.equal(0xff, buffer[5]);
+  assert.equal(0xff, buffer[6]);
+  assert.equal(0xff, buffer[7]);
+
+  buffer.writeInt32BE(-805306713, 0);
+  buffer.writeInt32LE(-805306713, 4);
+  assert.equal(0xcf, buffer[0]);
+  assert.equal(0xff, buffer[1]);
+  assert.equal(0xfe, buffer[2]);
+  assert.equal(0xa7, buffer[3]);
+  assert.equal(0xa7, buffer[4]);
+  assert.equal(0xfe, buffer[5]);
+  assert.equal(0xff, buffer[6]);
+  assert.equal(0xcf, buffer[7]);
+
+  /* Make sure we handle min/max correctly */
+  buffer.writeInt32BE(0x7fffffff, 0);
+  buffer.writeInt32BE(-0x80000000, 4);
+  assert.equal(0x7f, buffer[0]);
+  assert.equal(0xff, buffer[1]);
+  assert.equal(0xff, buffer[2]);
+  assert.equal(0xff, buffer[3]);
+  assert.equal(0x80, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x00, buffer[7]);
+  assert.throws(function() {
+    buffer.writeInt32BE(0x7fffffff + 1, 0);
+  });
+  assert.throws(function() {
+    buffer.writeInt32BE(-0x80000000 - 1, 0);
+  });
+
+  buffer.writeInt32LE(0x7fffffff, 0);
+  buffer.writeInt32LE(-0x80000000, 4);
+  assert.equal(0xff, buffer[0]);
+  assert.equal(0xff, buffer[1]);
+  assert.equal(0xff, buffer[2]);
+  assert.equal(0x7f, buffer[3]);
+  assert.equal(0x00, buffer[4]);
+  assert.equal(0x00, buffer[5]);
+  assert.equal(0x00, buffer[6]);
+  assert.equal(0x80, buffer[7]);
+  assert.throws(function() {
+    buffer.writeInt32LE(0x7fffffff + 1, 0);
+  });
+  assert.throws(function() {
+    buffer.writeInt32LE(-0x80000000 - 1, 0);
+  });
+});
+
+/*
+ * We need to check the following things:
+ *  - We are correctly resolving big endian (doesn't mean anything for 8 bit)
+ *  - Correctly resolving little endian (doesn't mean anything for 8 bit)
+ *  - Correctly using the offsets
+ *  - Correctly interpreting values that are beyond the signed range as unsigned
+ */
+exports.testWriteUInt8 = helper('writeUInt8', function (assert) {
+  var data = new Buffer(4);
+
+  data.writeUInt8(23, 0);
+  data.writeUInt8(23, 1);
+  data.writeUInt8(23, 2);
+  data.writeUInt8(23, 3);
+  assert.equal(23, data[0]);
+  assert.equal(23, data[1]);
+  assert.equal(23, data[2]);
+  assert.equal(23, data[3]);
+
+  data.writeUInt8(23, 0);
+  data.writeUInt8(23, 1);
+  data.writeUInt8(23, 2);
+  data.writeUInt8(23, 3);
+  assert.equal(23, data[0]);
+  assert.equal(23, data[1]);
+  assert.equal(23, data[2]);
+  assert.equal(23, data[3]);
+
+  data.writeUInt8(255, 0);
+  assert.equal(255, data[0]);
+
+  data.writeUInt8(255, 0);
+  assert.equal(255, data[0]);
+});
+
+
+exports.testWriteUInt16 = helper('writeUInt16BE/writeUInt16LE', function (assert) {
+  var value = 0x2343;
+  var data = new Buffer(4);
+
+  data.writeUInt16BE(value, 0);
+  assert.equal(0x23, data[0]);
+  assert.equal(0x43, data[1]);
+
+  data.writeUInt16BE(value, 1);
+  assert.equal(0x23, data[1]);
+  assert.equal(0x43, data[2]);
+
+  data.writeUInt16BE(value, 2);
+  assert.equal(0x23, data[2]);
+  assert.equal(0x43, data[3]);
+
+  data.writeUInt16LE(value, 0);
+  assert.equal(0x23, data[1]);
+  assert.equal(0x43, data[0]);
+
+  data.writeUInt16LE(value, 1);
+  assert.equal(0x23, data[2]);
+  assert.equal(0x43, data[1]);
+
+  data.writeUInt16LE(value, 2);
+  assert.equal(0x23, data[3]);
+  assert.equal(0x43, data[2]);
+
+  value = 0xff80;
+  data.writeUInt16LE(value, 0);
+  assert.equal(0xff, data[1]);
+  assert.equal(0x80, data[0]);
+
+  data.writeUInt16BE(value, 0);
+  assert.equal(0xff, data[0]);
+  assert.equal(0x80, data[1]);
+});
+
+
+exports.testWriteUInt32 = helper('writeUInt32BE/writeUInt32LE', function (assert) {
+  var data = new Buffer(6);
+  var value = 0xe7f90a6d;
+
+  data.writeUInt32BE(value, 0);
+  assert.equal(0xe7, data[0]);
+  assert.equal(0xf9, data[1]);
+  assert.equal(0x0a, data[2]);
+  assert.equal(0x6d, data[3]);
+
+  data.writeUInt32BE(value, 1);
+  assert.equal(0xe7, data[1]);
+  assert.equal(0xf9, data[2]);
+  assert.equal(0x0a, data[3]);
+  assert.equal(0x6d, data[4]);
+
+  data.writeUInt32BE(value, 2);
+  assert.equal(0xe7, data[2]);
+  assert.equal(0xf9, data[3]);
+  assert.equal(0x0a, data[4]);
+  assert.equal(0x6d, data[5]);
+
+  data.writeUInt32LE(value, 0);
+  assert.equal(0xe7, data[3]);
+  assert.equal(0xf9, data[2]);
+  assert.equal(0x0a, data[1]);
+  assert.equal(0x6d, data[0]);
+
+  data.writeUInt32LE(value, 1);
+  assert.equal(0xe7, data[4]);
+  assert.equal(0xf9, data[3]);
+  assert.equal(0x0a, data[2]);
+  assert.equal(0x6d, data[1]);
+
+  data.writeUInt32LE(value, 2);
+  assert.equal(0xe7, data[5]);
+  assert.equal(0xf9, data[4]);
+  assert.equal(0x0a, data[3]);
+  assert.equal(0x6d, data[2]);
+});
+
+function helper (description, fn) {
+  return function (assert) {
+    let bulkAssert = {
+      equal: function (a, b) {
+        if (a !== b) throw new Error('Error found in ' + description);
+      },
+      ok: function (value) {
+        if (!value) throw new Error('Error found in ' + description);
+      },
+      /*
+       * TODO
+       * There should be errors when setting outside of the value range
+       * of the data type (like writeInt8 with value of 1000), but DataView
+       * does not throw; seems to just grab the appropriate max bits.
+       * So ignoring this test for now
+       */
+      throws: function (shouldThrow) {
+        assert.pass(description + ': Need to implement error handling for setting buffer values ' +
+          'outside of the data types\' range.');
+        /*
+        let didItThrow = false;
+        try {
+          shouldThrow();
+        } catch (e) {
+          didItThrow = e;
+        }
+        if (!didItThrow)
+          throw new Error('Error found in ' + description + ': ' + shouldThrow + ' should have thrown');
+        */
+      }
+    };
+    fn(bulkAssert);
+    // If we get here, no errors thrown
+    assert.pass('All tests passed for ' + description);
+  };
+}