Initial add from apps

packages/ui-identicon/src/beachball/seeder.spec.js

@@ -0,0 +1,27 @@
+// Copyright 2017-2018 @polkadot/ui-identicon authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import newSeeder from './seeder';
+
+describe('seeder', () => {
+  let seeder;
+
+  beforeEach(() => {
+    seeder = newSeeder(new Uint8Array([1, 2, 3, 4]));
+  });
+
+  it('generates numbers using 2 spaces', () => {
+    expect(
+      seeder()
+    ).toEqual(0.0156402587890625);
+  });
+
+  it('generates numbers using 2 spaces (incremented)', () => {
+    seeder();
+
+    expect(
+      seeder()
+    ).toEqual(0.0078582763671875);
+  });
+});