Jasmine ES6

gulpfile.js

var gulp = require('gulp')
  , jasmine = require('gulp-jasmine')

gulp.task('default', function() {
  require('babel/register');
  return gulp.src('test.js').pipe(jasmine())
});

spec.js

describe("A suite", () => {
  it("contains spec with an expectation", () => {
    expect(true).toBe(true);
  });
});