session-desktop/libtextsecure/test/helpers_test.js

'use strict';

describe("Helpers", function() {
  describe("ArrayBuffer->String conversion", function() {
      it('works', function() {
          var b = new ArrayBuffer(3);
          var a = new Uint8Array(b);
          a[0] = 0;
          a[1] = 255;
          a[2] = 128;
          assert.equal(getString(b), "\x00\xff\x80");
      });
  });

  describe("stringToArrayBuffer", function() {
      it('returns ArrayBuffer when passed string', function() {
          var StaticArrayBufferProto = new ArrayBuffer().__proto__;
          var anArrayBuffer = new ArrayBuffer(1);
          var typedArray = new Uint8Array(anArrayBuffer);
          typedArray[0] = 'a'.charCodeAt(0);
          assertEqualArrayBuffers(stringToArrayBuffer('a'), anArrayBuffer);
      });
      it('throws an error when passed a non string', function() {
          var notStringable = [{}, undefined, null, new ArrayBuffer()];
          notStringable.forEach(function(notString) {
            assert.throw(function() { stringToArrayBuffer(notString) }, Error);
          });
      });
  });
});