Capitalize background scripts

test/background/repositories/Mark.test.js

@@ -0,0 +1,26 @@
+import MarkRepository from 'background/repositories/MarkRepository';
+import GlobalMark from 'background/domains/GlobalMark';
+
+describe('background/repositories/mark', () => {
+  let repository;
+
+  beforeEach(() => {
+    repository = new MarkRepository;
+  });
+
+  it('get and set', async() => {
+    let mark = new GlobalMark(1, 'http://example.com', 10, 30);
+
+    repository.setMark('A', mark);
+
+    let got = await repository.getMark('A');
+    expect(got).to.be.a('object');
+    expect(got.tabId).to.equal(1);
+    expect(got.url).to.equal('http://example.com');
+    expect(got.x).to.equal(10);
+    expect(got.y).to.equal(30);
+
+    got = await repository.getMark('B');
+    expect(got).to.be.undefined;
+  });
+});