test(button): added unit-test

test/unit/button.js

@@ -0,0 +1,54 @@
+// import {TaskQueue} from 'aurelia-task-queue';
+import {initialize} from 'aurelia-pal-browser';
+import {MdButton} from 'src/button/button';
+
+describe('Button', () => {
+  let element;
+  // let taskQueue;
+  let button;
+
+  beforeEach(() => {
+    initialize();
+
+    element = document.createElement('a');
+    document.body.appendChild(element);
+
+    // taskQueue = new TaskQueue();
+    button = new MdButton(element);
+  });
+
+  it('sets btn class', () => {
+    button.attached();
+    expect(element.classList.contains('btn')).toBe(true);
+  });
+
+  it('sets accent class', () => {
+    button.attached();
+    expect(element.classList.contains('accent')).toBe(true);
+  });
+
+  it('sets flat class if flat is specified', () => {
+    button.flat = true;
+    button.attached();
+    expect(element.classList.contains('btn-flat')).toBe(true);
+  });
+
+  it('does not set accent class if flat is specified', () => {
+    button.flat = true;
+    button.attached();
+    expect(element.classList.contains('btn-flat')).toBe(true);
+    expect(element.classList.contains('accent')).toBe(false);
+  });
+
+  it('sets large class if large is specified', () => {
+    button.large = true;
+    button.attached();
+    expect(element.classList.contains('btn-large')).toBe(true);
+  });
+
+  it('sets disabled class if disabled is specified', () => {
+    button.disabled = true;
+    button.attached();
+    expect(element.classList.contains('disabled')).toBe(true);
+  });
+});