diff --git a/test-browser.js b/test-browser.js
@@ -0,0 +1,38 @@
+/* eslint-env jasmine */
+'use strict';
+const hashjs = require('hash.js');
+const is = require('@sindresorhus/is');
+const {sha1, sha256, sha384, sha512} = require('./browser');
+
+const fixture = 'foo bar baz';
+
+it('sha1', async () => {
+	expect(await sha1('🦄')).toEqual('5df82936cbf0864be4b7ba801bee392457fde9e4');
+	expect(await sha1(fixture)).toEqual(hashjs.sha1().update(fixture).digest('hex'));
+});
+
+it('sha256', async () => {
+	expect(await sha256('🦄')).toEqual('36bf255468003165652fe978eaaa8898e191664028475f83f506dabd95298efc');
+	expect(await sha256(fixture)).toEqual(hashjs.sha256().update(fixture).digest('hex'));
+});
+
+it('sha384', async () => {
+	expect(await sha384('🦄')).toEqual('a9d4dfb503394bd9701d60eb5fb1d7fb800580b43d874165103b16d311fb5c97545cb89f06c31f30e219f5b603e834ca');
+	expect(await sha384(fixture)).toEqual(hashjs.sha384().update(fixture).digest('hex'));
+});
+
+it('sha512', async () => {
+	expect(await sha512('🦄')).toEqual('7d9e515c59bd15d0692f9bc0c68f50f82b62a99bef4b8dc490cec165296210dff005529a4cb84a655eee6ddec82339e6bdbab21bdb287b71a543a56cfab53905');
+	expect(await sha512(fixture)).toEqual(hashjs.sha512().update(fixture).digest('hex'));
+});
+
+it('buffer input', async () => {
+	const fixture = new Uint16Array([1, 2, 3]);
+	expect(await sha1(fixture)).toEqual('5b9ba303e3d8ef9e9d421085303cda49d64c79bf');
+});
+
+it('buffer output', async () => {
+	const result = await sha1('🦄', {outputFormat: 'buffer'});
+	expect(is(result)).toEqual('ArrayBuffer');
+});
+
diff --git a/test.js b/test.js
@@ -0,0 +1,36 @@
+import test from 'ava';
+import hashjs from 'hash.js';
+import is from '@sindresorhus/is';
+import {sha1, sha256, sha384, sha512} from '.';
+
+const fixture = 'foo bar baz';
+
+test('sha1', async t => {
+	t.is(await sha1('🦄'), '5df82936cbf0864be4b7ba801bee392457fde9e4');
+	t.is(await sha1(fixture), hashjs.sha1().update(fixture).digest('hex'));
+});
+
+test('sha256', async t => {
+	t.is(await sha256('🦄'), '36bf255468003165652fe978eaaa8898e191664028475f83f506dabd95298efc');
+	t.is(await sha256(fixture), hashjs.sha256().update(fixture).digest('hex'));
+});
+
+test('sha384', async t => {
+	t.is(await sha384('🦄'), 'a9d4dfb503394bd9701d60eb5fb1d7fb800580b43d874165103b16d311fb5c97545cb89f06c31f30e219f5b603e834ca');
+	t.is(await sha384(fixture), hashjs.sha384().update(fixture).digest('hex'));
+});
+
+test('sha512', async t => {
+	t.is(await sha512('🦄'), '7d9e515c59bd15d0692f9bc0c68f50f82b62a99bef4b8dc490cec165296210dff005529a4cb84a655eee6ddec82339e6bdbab21bdb287b71a543a56cfab53905');
+	t.is(await sha512(fixture), hashjs.sha512().update(fixture).digest('hex'));
+});
+
+test('buffer input', async t => {
+	const fixture = new Uint16Array([1, 2, 3]);
+	t.is(await sha1(fixture), '5b9ba303e3d8ef9e9d421085303cda49d64c79bf');
+});
+
+test('buffer output', async t => {
+	const result = await sha1('🦄', {outputFormat: 'buffer'});
+	t.is(is(result), 'ArrayBuffer');
+});