Add node modules and compiled JavaScript from main

node_modules/typedarray-to-buffer/test/basic.js

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+var test = require('tape')
+var toBuffer = require('../')
+
+test('convert to buffer from Uint8Array', function (t) {
+  if (typeof Uint8Array !== 'undefined') {
+    var arr = new Uint8Array([1, 2, 3])
+    arr = toBuffer(arr)
+
+    t.deepEqual(arr, Buffer.from([1, 2, 3]), 'contents equal')
+    t.ok(Buffer.isBuffer(arr), 'is buffer')
+    t.equal(arr.readUInt8(0), 1)
+    t.equal(arr.readUInt8(1), 2)
+    t.equal(arr.readUInt8(2), 3)
+  } else {
+    t.pass('browser lacks Uint8Array support, skip test')
+  }
+  t.end()
+})
+
+test('convert to buffer from another arrayview type (Uint32Array)', function (t) {
+  if (typeof Uint32Array !== 'undefined' && Buffer.TYPED_ARRAY_SUPPORT !== false) {
+    var arr = new Uint32Array([1, 2, 3])
+    arr = toBuffer(arr)
+
+    t.deepEqual(arr, Buffer.from([1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0]), 'contents equal')
+    t.ok(Buffer.isBuffer(arr), 'is buffer')
+    t.equal(arr.readUInt32LE(0), 1)
+    t.equal(arr.readUInt32LE(4), 2)
+    t.equal(arr.readUInt32LE(8), 3)
+    t.equal(arr instanceof Uint8Array, true)
+  } else {
+    t.pass('browser lacks Uint32Array support, skip test')
+  }
+  t.end()
+})
+
+test('convert to buffer from ArrayBuffer', function (t) {
+  if (typeof Uint32Array !== 'undefined' && Buffer.TYPED_ARRAY_SUPPORT !== false) {
+    var arr = new Uint32Array([1, 2, 3]).subarray(1, 2)
+    arr = toBuffer(arr)
+
+    t.deepEqual(arr, Buffer.from([2, 0, 0, 0]), 'contents equal')
+    t.ok(Buffer.isBuffer(arr), 'is buffer')
+    t.equal(arr.readUInt32LE(0), 2)
+    t.equal(arr instanceof Uint8Array, true)
+  } else {
+    t.pass('browser lacks ArrayBuffer support, skip test')
+  }
+  t.end()
+})