Add gulpfile

gulpfile.js

@@ -0,0 +1,27 @@
+const gulp = require('gulp');
+const ts = require('gulp-typescript');
+const typescript = require('typescript');
+const del = require('del');
+const mocha = require('gulp-mocha');
+const gutil = require('gulp-util');
+
+const tsProject = ts.createProject('tsconfig.json', { typescript });
+
+gulp.task('build', ['clean'], () => {
+	const result = gulp.src("src/**/*.ts")
+		.pipe(tsProject());
+
+	return result.js.pipe(gulp.dest('out'));
+});
+
+gulp.task('clean', () => {
+	return del(['out']);
+});
+
+gulp.task('mocha', ['build'], () => {
+	return gulp.src(['out/test/**/*.js'], { read: false })
+		.pipe(mocha({ reporter: 'list' }))
+		.on('error', gutil.log);
+});
+
+gulp.task('default', ['mocha']);